- Rationalize the roles of electron donating-withdrawing groups in the impacts on solvatochromism, nonlinear optics, and electroluminescence devices
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The correlation between chemical structure and photophysical behavior is vital for development of luminogens in the application of optoelectronics. Different donor, acceptor and π-bridge were systematically combined to produce a series of D-π-A-π-D chromo
- Chen, Chih-Hsien,Luo, Zi-Huan,Huan, I-Hong,Chen, Yu-Han,Lim, Tsong-Shin
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Read Online
- Tailoring Excited State Properties and Energy Levels Arrangement via Subtle Structural Design on D-π-A Materials
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The donor-π-conjugated-acceptor (D-π-A) structure is an important design for the luminescent materials because of its diversity in the selections of donor, π-bridge and acceptor groups. Herein, we demonstrate two examples of D-π-A structures capable to finely modulate the excited state properties and arrangement of energy levels, TPA-AN-BP and CZP-AN-BP, which possess the same acceptor and π-bridge but different donor. The investigation of their photophysical properties and DFT calculation revealed that the D-π-A structure with proper donor, π-bridge and acceptor can result in separation of frontier molecular orbitals on the corresponding donor and acceptor with an obvious overlap on the π-bridge, resulting in a hybridized local and charge-transfer (HLCT) excited state with high photoluminescent (PL) efficiencies. Meanwhile, their singlet and triplet states are arranged on corresponding moieties with large energy gap between T2 and T1, and a small energy gap between S1 and T2, which favor the reverse intersystem crossing (RISC) from high-lying triplet levels to singlet levels. As a result, the sky-blue emission non-doped OLED based on the TPA-AN-BP reached maximum external quantum efficiency (EQE) of 4.39% and a high exciton utilization efficiency (EUE) of 77%. This study demonstrates a new strategy to construct highly efficient OLED materials.
- Liang, Xiaoming,Wang, Zhiheng,Wang, Liangxuan,Hanif, Muddasir,Hu, Dehua,Su, Shijian,Xie, Zengqi,Gao, Yu,Yang, Bing,Ma, Yuguang
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- 6,6′-Ditriphenylamine-2,2′-bipyridine: Coordination Chemistry and Electrochemical and Photophysical Properties
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A 2,2′-bipyridine with bulky triphenylamine substituents in the 6 and 6′ positions of the ligand (6,6′-ditriphenylamine-2,2′-bipyridine, 6,6′-diTPAbpy) was generated. Despite the steric bulk, the ligand readily formed bis(homoleptic) complexes with copper
- Cording, Andrew P.,Crowley, James D.,Gordon, Keith C.,Mapley, Joseph I.,McAdam, C. John,Ross, Daniel A. W.,Vasdev, Roan A. S.
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- Effect of anchoring group in anthracene/ thiophene-bridged triphenylamine-based organic dyes for dye-sensitized solar cells
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Triphenylamine-based metal-free organic dyes (D1–D3) with different electron acceptors such as 2-cyanoacetic acid, rhodanine-3-acetic acid, or 5-oxo-1-phenyl-2-pyrazolin-3-carboxylic acid connected through anthracene and thiophene -spacers were synthesized and applied in dye-sensitized solar cells. The photophysical and electrochemical properties of these dyes were investigated and their performance as sensitizers in dye-sensitized solar cells was evaluated. Electrochemical studies showed that the lowest unoccupied molecular orbital energy levels can be tuned by introduction of various anchoring groups with different electron withdrawing abilities. The power conversion efficiencies of the dye-sensitized solar cells based on D1–D3 decreased as the electron withdrawing ability of their anchoring groups increased in the order D1 D2 D3. The D1-based device showed the highest power conversion efficiency (1.27%).
- Thuy, Le Thi,Ho, Phuong,Bao, Le Quoc,Thuy, Chau Thi Thanh,Cheruku, Rajesh,Jo, Hyun-Jun,Thogiti, Suresh,Kim, Jae Hong
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- Decreasing the energy consumption of memory devices by enhancing the conjugation extent of the terminal electron- donating moieties within molecules
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Three small organic molecules that contained a phenothiazine backbone and triphenylamine (TPA), carbazole (CZ), or anthracene (AN) as a terminal electron donor were synthesized and fabricated in ITO/organic film/Al sandwiched memory devices. The influence
- Bo, Rongcheng,Liu, Hongzhang,Zhou, Qianhao,Chen, Dongyun,Xu, Qingfeng,Li, Najun,Li, Hua,Lu, Jianmei
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- Administration of the D-A structure and steric hindrance effect to construct efficient red emitters for high-performance OLEDs with low efficiency roll-off
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Restricted by the energy-gap law and π-π stacking, developing highly efficient red emitting materials and corresponding organic light-emitting diodes (OLEDs) having the emission over 600 nm is a formidable challenge. Three red emitters, namely DPABz-TPA,
- Ding, Guan-Yu,Zang, Chun-Xiu,Zhang, Han,Su, Zhong-Min,Li, Guang-Fu,Wen, Li-Li,Han, Xu,Xie, Wen-Fa,Shan, Guo-Gang
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Read Online
- Multiple Luminescence Responses towards Mechanical Stimulus and Photo-Induction: The Key Role of the Stuck Packing Mode and Tunable Intermolecular Interactions
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Organic luminescence with different forms continues to be one of the most active research fields in science and technology. Herein, an ultra-simple organic molecule (TPA-B), which exhibits both mechanoluminescence (ML) and photo-induced room-temperature phosphorescence (RTP) in the crystalline state, provides an opportunity to reveal the internal mechanism of ML and the dynamic process of photo-induced RTP in the same molecule. Through the detailed investigation of photophysical properties together with crystal structures, the key role of molecular packing and intermolecular interactions was highlighted in the luminescence response by mechanical and light stimulus, affording efficient strategies to design potential smart functional materials with multiple luminescence properties.
- Dang, Qianxi,Hu, Lanzhen,Wang, Jiaqiang,Zhang, Qunhua,Han, Mengmeng,Luo, Simeng,Gong, Yanbin,Wang, Can,Li, Qianqian,Li, Zhen
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Read Online
- Structural studies and photovoltaic investigation of indolo[2,3-: B] quinoxaline-based sensitizers/co-sensitizers achieving highly efficient DSSCs
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Three metal-free organic dyes, coded FS10, FS11, and FS12, were designed and synthesized by employing indolo[2,3-b]quinoxaline (IQ) as the main building block and three different edged donors, viz., triphenylamine, carbazole, and phenothiazine, respective
- Su, Rui,Lyu, Luping,Elmorsy, Mohamed R.,El-Shafei, Ahmed
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Read Online
- Arylamine-based organic compound and organic electroluminescent device containing same
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The invention relates to the technical field of semiconductor materials, in particular to an arylamine organic compound and an organic electroluminescent device containing the same. The structure of the compound is shown in the general formula (I). The ar
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Paragraph 0236-0237; 0239
(2021/09/21)
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- Optical and electrochemical effects of triarylamine inclusion to alkoxy BODIPY-based derivatives
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Three new triphenylamine-BODIPY dyadsBDPT1-3have been designed and synthesized. Their optoelectronic properties were investigated, which revealed strong electronic interactions between the donor and acceptor moieties, together with high sensitivity to the inclusion of alkoxy groups. The properties of the dyads were compared with those of reference compoundsAandBDP1, which exhibit broader absorption in the visible region as a result of the inclusion of donor groups and extended conjugation of the BODIPY core. Fluorescence quenching was also observed, which was attributed to the photoinduced electron transfer, evidenced from solvatochromic measurements, quantum yields and theoretical calculations. The oxidation potentials of new compounds were found to be lower when compared with those of other BODIPY analogues with donor groups attached. The redox, computational, absorbance and emission data suggest that compoundsBDPT1-3exhibit promising properties for their application in organic photovoltaic or light emitting (optoelectronic) devices.
- Insuasty, Alberto,Madrid-Usuga, Duvalier,Mora-León, Ana G.,Ortiz, Alejandro,Rocha-Ortiz, Juan S.
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p. 18114 - 18123
(2021/10/12)
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- Cyclometalated Platinum(II) Complexes with Donor-Acceptor-Containing Bidentate Ligands and Their Application Studies as Organic Resistive Memories
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A series of heteroleptic cyclometalated platinum(II) complexes, [Pt(C^N)(O^O)], (1–10) with various donors and acceptors has been synthesized and characterized by 1H NMR spectroscopy, elemental analyses, infrared spectroscopy and mass spectrometry. The X-ray structure of 2 has also been determined. The electrochemical and photophysical properties of the platinum(II) complexes were studied. These experimental results have been supported by computational studies. Furthermore, two of the complexes have been employed as the active material in the fabrication of resistive memory devices, exhibiting stable binary memory performance with low operating voltage, high ON/OFF ratio and long retention time.
- Poh, Wei Church,Au-Yeung, Ho-Leung,Chan, Alan Kwun-Wa,Hong, Eugene Yau-Hin,Cheng, Yat-Hin,Leung, Ming-Yi,Lai, Shiu-Lun,Low, Kam-Hung,Yam, Vivian Wing-Wah
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supporting information
p. 3669 - 3676
(2021/09/29)
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- UV to NIR multistate electrochromism and electrofluorochromism in dibenzophenazine-arylamine derivatives
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An intriguing case of intramolecular and intervalence charge transfer-driven multistate electrochromism and electrofluorochromism in dibenzophenazin-(phenyl)methanone and arylamine-based redox-active donor-acceptor-donor molecules was elucidated. Tunable
- Patra, Abhijit,Sarkar, Madhurima,Sengupta, Arunava,Singh, Kuldeep,Sk, Bahadur
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supporting information
p. 13590 - 13593
(2021/12/23)
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- Charge separation and singlet fission in covalently linked diketopyrrolopyrrole derivatives and triphenylamine triad in solution
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A covalently linked push-pull type triad containing two unsymmetrical electron donors, triphenylamine (TPA) and benzothiophene (BT), and diketopyrrolopyrrole (DPP), an electron acceptor, through thiophene spacer has been synthesized (BT-DPP-TPA(7)) and ultrafast relaxation dynamics of the triad has been explored in solution phase by various spectroscopic methods. Steady-state and time-resolved emission studies show the efficient fluorescence quenching of the DPP entity of as prepared BT-DPP-TPA(7) triad. The negative free energy values comprising the redox potentials and singlet state energy of BT-DPP-TPA(7) revealed the probability of electron transfer from the singlet ground state of TPA to the excited singlet state of DPP. Femtosecond transient absorption (fsTA) spectroscopic studies confirmed the formation of charge separation state by detecting triphenylamine radical cation as electron-transfer transients. The rate of charge separation, kCS, is (109?108 s?1) observed to be increasing from nonpolar to polar solvents and the rate of charge recombination, kCR, was found to be slower (μs time scale) in polar solvents like DMF and chloroform, than that in hexane, non-polar solvent (ns time scale). This novel aspect could be due to asymmetrically designed push-pull type triad, a feature that was not evident in push-pull triad constructed using symmetric TPA as electron donors. Furthermore, fsTA studies also demonstrate, for the first time, that the DPP derivatives, TDPP(4) and BT-DPP-TPA(7), both undergo singlet fission (SF) event (S→TT) in 100?200 ps time scale in solution phase for the solution of concentration above ~100 μM. These results may pave the new avenue for device design comprising DPP derivatives.
- Bangal, Prakriti Ranjan,Chakali, Madhu,Dyaga, Bharath,Mandal, Haraprasad,Rao, V. Jayathirtha,Venkatesan, Munisamy
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- D-A type excited state proton transfer high-efficiency fluorescent material, and preparation method and application thereof
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The invention belongs to the technical field of organic fluorescent materials, and discloses a D-A type excited state proton transfer high-efficiency fluorescent material, and a preparation method andan application thereof. The specific structure of the D-A type excited state proton transfer high-efficiency fluorescent material is shown in the specification. The method comprises the following steps: carrying out a Suzuki coupling reaction on triphenylamine-4-boronic acid pinacol ester and 4-bromo-2-((N-phenyl)-9,10-phenanthroimidazole)phenol in a catalytic system, and carrying out subsequenttreatment to obtain the organic small molecular fluorescent material with the D-A structure. The fluorescent material has efficient fluorescence quantum efficiency, and can improve the luminous efficiency of an OLED device; and the large delta ET2-T1 and the small delta ES1-T2 are helpful for T2 to jump to the reverse system of S1, so that the exciton utilization rate and the external quantum efficiency of the OLED device are improved. The method is simple. The application is an application f the fluorescent material in the organic light-emitting device.
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- One-pot synthesis of a white-light emissive bichromophore operated by aggregation-induced dual emission (AIDE) and partial energy transfer
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Merocyanine-triarylamine bichromophores are readily synthesized by sequentially Pd-catalyzed insertion-alkynylation-Michael-Suzuki four-component reactions. White-light emissive systems form upon aggregation in 1 : 99 and 0.1 : 99.9 vol percent CH2Cl2-cyclohexane mixtures, ascribed to aggregation-induced dual emission (AIDE) in combination with partial energy transfer between both chromophore units as supported by spectroscopic studies.
- Biesen, Lukas,Deni?en, Melanie,Hannen, Ricarda,Hoffmann, Katrin,Itskalov, Dana,Müller, Thomas J. J.,Nirmalananthan-Budau, Nithiya,Reiss, Guido J.,Resch-Genger, Ute
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supporting information
p. 7407 - 7410
(2020/07/15)
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- Organic compound based on azabenzene and dicarboximide derivative and application of organic compound
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The invention discloses an organic compound based on azabenzene and a dicarboximide derivative and application of the organic compound, belonging to the technical field of semiconductors. The structure of the compound provided by the invention is shown as
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Paragraph 0062; 0066-0068; 0069-0070; 0072
(2020/09/09)
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- ORGANIC ELECTROLUMINESCENCE ELEMENT AND MATERIAL
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PROBLEM TO BE SOLVED: To provide a phosphorescent metal complex emitting blue light, which shows a low drive voltage, high emission efficiency, high color purity of emission and a long emission life when used for an element, and to provide an organic electroluminescence element containing the above metal complex. SOLUTION: The present invention provides a compound represented by general formula (I): ML1mL2n, and an organic electroluminescence element containing the above compound. SELECTED DRAWING: Figure 1 COPYRIGHT: (C)2020,JPOandINPIT
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- Study on new quinacridone derivatives with enhanced third-order nonlinear optical properties
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Seven new quinacridone derivatives were designed and synthesized. The relationship between molecular structure and nonlinear optical properties was studied by cyclic voltammetry, DFT calculation and Z-scan. By introducing strong electron donating groups at the two sides of the quinacridone, and then introducing a strong electron withdrawing group dicyanoethylene group, the band gap of the molecule can be effectively reduced, and the intramolecular charge transfer can be promoted. The results shown that the HOMO/LUMO band gaps of the target compounds are all reduced, and QA-F has the best third-order nonlinear optical performance, and its γ (γ = 5.32 × 10?33 esu) is 4.38 times that of QA-1 (γ = 1.21 × 10?33 esu).
- Cui, Yanhong,Jia, Jianhong,Liang, Guanqiu,Sha, Yangcheng,She, Yuanbin,Yu, Guoyi,Zhou, Chunsong
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supporting information
(2020/04/28)
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- Twisted donor-acceptor molecules for efficient deep blue electroluminescence with CIE: Y ~ 0.06
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Blue luminescent materials for organic light-emitting diodes (OLEDs) are crucial for full-color displays and white-lighting. However, challenges remain in high color purity and efficiency of blue emitters. Herein, two highly twisted D-A molecules, using b
- Feng, Xin Jiang,Lu, Hua,Shen, Ziqiu,Tang, Weiguo,Zhao, Zujin,Zhu, Xiangyu
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p. 9401 - 9409
(2020/07/27)
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- Novel small-molecule fluorophores for: In vivo NIR-IIa and NIR-IIb imaging
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Near-infrared fluorescence imaging in the 1000-1700 nm-wavelength window (NIR-II) has exhibited great potential for deep-Tissue bioimaging due to its diminished auto-fluorescence, suppressed photo-scattering, deep penetration, and high spatial and tempora
- Deng, Zixin,Ding, Qihang,Li, Qianqian,Li, Yang,Liu, Yishen,Lu, Siyu,Meng, Xianli,Wang, Xiaofei,Wu, Junzhu,Xiao, Yuling,Zeng, Xiaodong,Zhou, Hui
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supporting information
p. 3289 - 3292
(2020/04/02)
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- Effect of a π-linker of push-pull D-π-A donor molecules on the performance of organic photodetectors
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We report organic photodetectors (OPDs) exhibiting high photocurrent density (Jph), low dark current density (Jd), and broadband external quantum efficiency (EQE) based on three push-pull type D-π-A small molecule donors (H1, H2, and H3) with different π-
- Chae, Sangmin,Choi, Min-Soo,Hong, Jong-In,Kim, Hyo Jung,Kim, Jang-Joo,Lim, Hong Chul
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supporting information
p. 11145 - 11152
(2020/09/09)
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- Triarylamine-BODIPY derivatives: A promising building block as hole transporting materials for efficient perovskite solar cells
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In this work, the syntheses and characterization of four new TPA-BODIPY dyads as hole-transporting layers (HTLs) are reported. The photophysical and electrochemical properties of the dyads BTPA-I, BTPA-II, BTPA-III and BTPA-IV are investigated in solution and compared with the reference compounds BDP, BDP1, BDP2, TPA, A (triphenylamine) and B (4,4′-dimethoxitriphenylamine). The TPA-BODIPY derivatives strongly absorb visible light and upon photoexcitation at the BODIPY unit, these dyads undergo photoinduced electron transfer to form the corresponding charge-separated species, which was confirmed by solvatochromic measures of fluorescence. Their redox potentials and photophysical properties suggested that the new BTPAs derivatives showed a better ionization potential that free triphenylamines, which makes them promising candidates to use as hole transport layers (HTLs).
- Ortiz, Alejandro
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- COMPOUND FOR ORGANIC DYES OF DYE-SENSITIZED SOLAR CELL AND DYE-SENSITIZED SOLAR CELL COMPRISING THE SAME
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The present invention relates to a compound for an organic dye of a dye-sensitized solar cell and the dye-sensitized solar cell including the same. The compound for an organic dye of a dye-sensitized solar cell includes anthracene-thiophene as a andpi;-spacer and is represented by chemical structural formula 1. In chemical structural formula 1, X is an anchoring group of organic dye and is any one of chemical structural formulas 2-1 to 2-3. The present invention enhances an intramolecular charge transfer through an anchoring group.COPYRIGHT KIPO 2020
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- BORON DIIODIDE COMPOUND, AND BORONIC ACID, BORONIC ESTER AND THE LIKE OBTAINED THEREFROM, AND PRODUCTION METHOD OF THEM
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PROBLEM TO BE SOLVED: To provide a method which enables simple production of a boronic acid, a boronic ester compound or the like suitable for production of various compounds. SOLUTION: The problem is solved by a boron diiodide compound represented by the following general formula (Y). (In the formula (Y), Ar is an n-valent heteroaryl ring, aryl ring having 10 or more carbon atoms, or substituted benzene ring, where at least one hydrogen atom in these rings may be substituted; n is an integer from 1 to 6; and at least one hydrogen atom in the compound represented by the formula (Y) may be substituted with deuterium.) COPYRIGHT: (C)2019,JPO&INPIT
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Paragraph 0255
(2019/05/10)
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- A universal host material with a simple structure for monochrome and white phosphorescent/TADF OLEDs
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The development of universal host materials suitable for both phosphorescent and thermally activated delayed fluorescent (TADF) emitters is still a bottleneck for fabricating highly efficient full-color and white organic light-emitting diodes (OLEDs) with
- Wu, Chao,Wang, Binyan,Wang, Yafei,Hu, Jianyong,Jiang, Jiaxing,Ma, Dongge,Wang, Qiang
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supporting information
p. 558 - 566
(2019/01/24)
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- Molecular engineering and investigation of new efficient photosensitizers/co-sensitizers based on bulky donor enriched with EDOT for DSSCs
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Herein, we report design, synthesis and photovoltaic performance of four novel metal-free heteroaromatic photosensitizers coded IA 1-4 with (D-D)2-D-A architecture carrying electron donating triphenylamine coupled with EDOT core which is direct
- Abdellah, Islam M.,Koraiem, Ahmed I.,El-Shafei, Ahmed
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p. 244 - 256
(2019/02/03)
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- CYANO-DERIVATIZED OLIGONOPHENYLACETYLENE-BASED FLUORESCENT SMALL MOLECULES SUITABLE FOR USE IN ORGANIC LIGHT-EMITTING DIODE APPLICATIONS AND THEIR USE IN ORGANIC LIGHT-EMITTING DIODE APPLICATIONS
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The present invention relates to the synthesis of oligonophenylacetylene-based fluorescent π-conjugated small molecules, which are derivatized with group or groups of cyano (-CN) and have the ability to emit light with very sharp emission peaks at differe
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Page/Page column 3; 9-10
(2019/12/28)
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- Palladium-Catalyzed Decarbonylative Borylation of Carboxylic Acids: Tuning Reaction Selectivity by Computation
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Decarbonylative borylation of carboxylic acids is reported. Carbon electrophiles are generated directly after reagent-enabled decarbonylation of the in situ accessible sterically-hindered acyl derivative of a carboxylic acid under catalyst controlled conditions. The scope and the potential impact of this method are demonstrated in the selective borylation of a variety of aromatics (>50 examples). This strategy was used in the late-stage derivatization of pharmaceuticals and natural products. Computations reveal the mechanistic details of the unprecedented C?O bond activation of carboxylic acids. By circumventing the challenging decarboxylation, this strategy provides a general synthetic platform to access arylpalladium species for a wide array of bond formations from abundant carboxylic acids. The study shows a powerful combination of experiment and computation to predict decarbonylation selectivity.
- Liu, Chengwei,Ji, Chong-Lei,Hong, Xin,Szostak, Michal
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supporting information
p. 16721 - 16726
(2018/11/30)
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- A benzhydryl radical based on the room temperature of the organic light-emitting material and using the material preparation of organic electroluminescent device
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A benzhydryl radical based on the stability of the organic light-emitting material at room temperature and using the material preparation of the organic electroluminescent device, which belongs to the field of organic light-emitting technology. The present invention in the preparation of the organic light-emitting material, the center of the common characteristic is the carbon free radical, is composed of two C - C covalent bond and a C - N to form a covalent bond. Stability is the light-emitting free radical material in the application of the key nature, connected to the electronic group conducive to stable free radical, in this invention through the nitrogen-containing heterocyclic carbazole, indole, dimethyl acridine and the like in the electronic group to the nitrogen atom is connected directly to the benzyl group, to obtain a stable benzhydryl radical, its stability and PTM, compared with the TTM is greatly improved, and has a room temperature fluorescent. The preparation of the material of the organic electroluminescent device using double thread condition exciton light-emitting, can avoid the traditional organic electroluminescent device in the use of the triplet state exciton, the maximum external quantum efficiency of the device is 0.66%.
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Paragraph 0089; 0123; 0124
(2018/07/30)
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- Organic micromolecule material based on 2,6-dimethyl-4-cyanophenyl receptor unit, preparation and application
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The invention belongs to the technical field of organic photoelectric materials, and discloses an organic micromolecule material based on a 2,6-dimethyl-4-cyanophenyl receptor unit, preparation and application. The organic micromolecule material has a structural formula as shown in formula (I), and Ar in the formula shows a phenyl aromatic amine heterocycle or phenyl aromatic amine donor unit. Thematerial has a weak intramolecular charge transfer state, and thus, fluorescence emission of a zone from dark blue to ultraviolet can be realized. Meanwhile, because the molecules have quite short effective conjugated length, the material has high triplet state energy level. In the application of an organic electroluminescent device, the problem of unbalanced charge carriers of a unipolar organicphotoelectric material can be solved effectively, therefore, the structure of the device is simplified, and the performance of the device is improved.
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Paragraph 0128; 0130; 0131
(2018/10/19)
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- Effect of the π-linker on the performance of organic photovoltaic devices based on push-pull D-π-A molecules
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Two push-pull D-π-A molecules, 3T and DTT as donor materials, were synthesized and characterized for solution-processed bulk heterojunction (BHJ) organic photovoltaic (OPV) devices. The π-linker plays a vital role not only in electrochemical and thermal p
- Lim, Hong Chul,Kim, Jang-Joo,Jang, Jyongsik,Hong, Jong-In
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p. 11458 - 11464
(2018/07/24)
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- Effects of donors of bodipy dyes on the performance of dye-sensitized solar cells
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A new series of donor-acceptor-π-linker-acceptor (D–A–π–A) featured organic dyes containing Bodipy derivative as the auxiliary acceptor, furan unit as the π conjugated spacer, and 2-cyanoacrylic acid as the anchor group were synthesized and applied in dye-sensitized solar cells (DSSCs). The incorporated electron-withdrawing unit of Bodipy enhances light harvesting by decreasing the molecular energy gap and red-shifting absorption spectra. For comparison, three different arylamine chromophores namely 3-methoxy-9H-carbazole (CBZ-B), triphenylamine (TPA-B) and phenoxazine (POZ-B) were separately appended onto the 6-position of Bodipy unit to study the effect of the electron donating groups on device performance. The UV–vis absorption spectra, electrochemical properties, density functional theory calculation, photovoltaic properties and electrochemical impedance measurements of DSSCs with these three dyes were systematically investigated. The Bodipy dyes have broad absorption spectra covering the range of 250–700?nm with the highest molar extinction coefficient up to >55?000?M?1?cm?1. The molecular energy level tuning can be conveniently accomplished by alternating the donor moiety. The DSSCs based on TPA-B showed the best photovoltaic performance: a maximum monochromatic incident photon-to-current conversion efficiency (IPCE) of 70%, a short-circuit photocurrent density (Jsc) of 13.95?mA?cm?2, an open-circuit photovoltage (Voc) of 557?mV, and a fill factor (ff) of 0.61, corresponding to an overall conversion efficiency of 4.76% under standard global AM 1.5G solar light conditions. Our research demonstrates that Bodipy based D–A–π–A molecular architecture is a highly promising class for the improvement of the performance of DSSCs in the future.
- Mao, Mao,Li, Qing-Song,Zhang, Xiao-Lin,Wu, Guo-Hua,Dai, Chun-Guang,Ding, Yong,Dai, Song-Yuan,Song, Qin-Hua
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p. 148 - 160
(2017/03/24)
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- Organic compound taking triazine and benzimidazole as cores and application thereof
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The invention relates to an organic compound taking triazine and benzimidazole as cores and application thereof to an OLED (Organic Light Emitting Diode) device. The compound provided by the invention has relatively high glass transition temperature and m
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Paragraph 0067; 0068; 0069; 0070
(2017/09/01)
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- A novel electron-acceptor moiety as a building block for efficient donor-acceptor based fluorescent organic lighting-emitting diodes
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A new electron-withdrawing moiety (BFPz) has been used for the first time as an acceptor in OLEDs and its corresponding core unit (2-Br-BFPz) was synthesized. Combined with an electron-donating moiety triphenylamine, a novel fluorescent material with a D-A structure named TPA-BFPz was synthesized. Encouragingly, the EQE values of non-doped and doped blue OLEDs reach 3.68% and 4.42%, respectively.
- Xue, Miao-Miao,Huang, Chen-Chao,Yuan, Yi,Zhang, Ye-Xin,Fung, Man-Keung,Liao, Liang-Sheng
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supporting information
p. 263 - 265
(2016/12/27)
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- Tuning photovoltaic performance of DOBT-based dyes via molecular design with ethynyl-linker and terminal electron-donating segment
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Two novel D-π-A-π-D-typed dioctyloxy-benzothiadiazole (DOBT)-based small molecules (SMs), TPAEDOBT and CZEDOBT, were designed and synthesized, consisting of ethynyl as π-linkage, besides, incorporating triphenylamine (TPA) and alkylated-carbazole (Cz) as
- Wang, Lihui,Yin, Lunxiang,Wang, Lijuan,Xie, Bao,Ji, Changyan,Li, Yanqin
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p. 203 - 211
(2017/02/05)
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- Bipolar luminescent material based on aromatic heterocyclic-2,8-S,S-dioxodibenzothiophene unit as well as preparation method and application of bipolar luminescent material
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The invention discloses a bipolar luminescent material based on an aromatic heterocyclic-2,8-S,S-dioxodibenzothiophene unit as well as a preparation method and an application of the bipolar luminescent material. The bipolar luminescent material is prepare
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Paragraph 0069; 0070; 0071; 0072
(2017/07/19)
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- Bipolar luminescent material based on bis-heteroaromatic ring-fused-3,7-S,S-dioxodibenzothiophene unit, and preparation method and application thereof
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The invention discloses a bipolar luminescent material based on a bis-heteroaromatic ring-fused-3,7-S,S-dioxodibenzothiophene unit, and a preparation method and an application thereof. In the invention, with the bis-heteroaromatic ring-fused-3,7-S,S-dioxodibenzothiophene unit as a nucleus, a donor unit is connected to the bis-heteroaromatic ring-fused-3,7-S,S-dioxodibenzothiophene unit through a Suzuki coupling reaction to prepare the bipolar luminescent material based on the bis-heteroaromatic ring-fused-3,7-S,S-dioxodibenzothiophene unit. The bipolar luminescent material has good solubility; when being dissolved in an organic solvent, the bipolar luminescent material can be used for preparing a luminous layer of a light emitting diode through spin-coating, ink-jet printing or printing film forming. The bipolar luminescent material contains both an electron transport unit and a hole transport unit, so that efficiency of an OLED based on the material is improved.
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Paragraph 0063; 0064; 0065; 0066
(2017/08/30)
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- based on fragrant heterocyclic and - 3 - S, S - two oxygen benzoin and thiophene unit double-polar small molecular light-emitting material and its preparation and use (by machine translation)
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The invention discloses based on fragrant heterocyclic and - 3 - S, S - two oxygen benzoin and thiophene unit double-polar small molecular light-emitting material and its preparation and use. The invention through the Suzuki coupling reaction, the electronic donor unit connected to the heterocycle and - 3 - S, S - two oxygen benzoin and thiophene prepared by the sides of the two units. The invention of based on fragrant heterocyclic and - 3 - S, S - two oxygen benzoin and thiophene unit double-polar small molecular light-emitting material has good solubility, film-forming property and thin membrane shape stability, while at the same time has good electron and hole transmission performance, can balance the carrier injection with the transmission, so that the more electron and hole effectively composite generating excitons, and avoid the hole/electron transport layer with the interface between the mixing phenomenon, thereby improving the efficiency of the light emitting device; based on the material of the luminescent layer in the electroluminescent light-emitting device can be used without the annealing treatment, so that the simple preparation process. (by machine translation)
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Paragraph 0063; 0064; 0065; 0066
(2017/08/30)
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- Bipolar small molecular light-emitting material based on naphthothiodibenzofuran unit as well as preparation method and application of bipolar small molecular light-emitting material
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The invention discloses a bipolar small molecular light-emitting material based on a naphthothiodibenzofuran unit as well as a preparation method and application of the bipolar small molecular light-emitting material. The preparation method provided by th
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Paragraph 0065; 0066; 0067; 0068
(2017/07/19)
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- Bipolar blue-light micro-molecular luminescent material based on naphtho-8-S,S-dioxydibenzothiophene unit, and preparation method and application thereof
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The invention discloses a bipolar blue-light micro-molecular luminescent material based on a naphtho-8-S,S-dioxydibenzothiophene unit, and a preparation method and application thereof. According to the invention, the naphtho-8-S,S-dioxydibenzothiophene un
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Paragraph 0066; 0067; 0068; 0069
(2017/09/13)
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- Bipolar small molecular luminescent material based on phenanthro-S,S-dioxo-dibenzothiophene unit and preparation method and application thereof
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The invention discloses a bipolar small molecular luminescent material based on a phenanthro-S,S-dioxo-dibenzothiophene unit and a preparation method and application thereof. The phenanthro-S,S-dioxo-dibenzothiophene unit is adopted as a core, a Suzuki coupling reaction is performed, a donor unit is connected to the phenanthro-S,S-dioxo-dibenzothiophene unit and the bipolar small molecular luminescent material based on the phenanthro-S,S-dioxo-dibenzothiophene unit is obtained. The bipolar small molecular luminescent material based on the phenanthro-S,S-dioxo-dibenzothiophene unit has the good solubleness, after the bipolar small molecular luminescent material is dissolved into an organic solvent, and a film is formed by spinning, ink-jet printing or printing to obtain a light emitting layer of a light-emitting diode. The bipolar small molecular luminescent material based on the phenanthro-S,S-dioxo-dibenzothiophene unit comprises both an electron transmission unit and a hole transport unit, and the material device efficiency is improved.
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Paragraph 0065-0068
(2017/09/26)
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- Bipolar micro-molecular luminescent material based on naphtho-2,7-S,S-dioxydibenzothiophene unit, and preparation method and application thereof
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The invention discloses a bipolar micro-molecular luminescent material based on a naphtho-2,7-S,S-dioxydibenzothiophene unit, and a preparation method and application thereof. According to the invention, the naphtho-2,7-S,S-dioxydibenzothiophene unit is u
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Paragraph 0068; 0069; 0070; 0071
(2017/09/13)
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- Diphenanthro-2,8-sulfur dibenzofuran unit-based bipolar micromolecular luminescent material, as well as preparation method and application thereof
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The invention discloses a diphenanthro-2,8-sulfur dibenzofuran unit-based bipolar micromolecular luminescent material, as well as a preparation method and application thereof. The diphenanthro-2,8-sulfur dibenzofuran unit-based bipolar micromolecular lumi
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Paragraph 0065; 0066; 0067; 0068
(2017/09/18)
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- Bipolar molecular luminescent material based on dithiofluorene unit, as well as preparation method and application of bipolar molecular luminescent material
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The invention discloses a bipolar molecular luminescent material based on a dithiofluorene unit, as well as a preparation method and application of the bipolar molecular luminescent material. The bipolar molecular luminescent material based on the dithiof
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Paragraph 0065; 0066; 0067; 0068
(2018/03/13)
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- An electroluminescent compound and an electroluminescent device comprising the same
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The present invention relates to an organic light emitting compound adopted to an organic electroluminescent device. The organic light emitting compound is represented by chemical formula 1 or chemical formula 2. In the case of adopting the organic light emitting compound as a phosphorescence host compound in a hole transport functional layer or a luminous layer, an organic electroluminescent device having excellent luminous characteristics such as operating voltage, brightness, long lifespan, etc.
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Paragraph 0292-0294; 0709-0711
(2016/10/10)
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- A series of organic electroluminescent material and its preparation method and application
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The invention discloses a series of organic electroluminescent materials, and a preparation method and an application thereof. A structural formula of the materials is shown as a formula I. The organic electroluminescent materials shown as the formula I have capacities of electron transportation and hole transportation. An organic electroluminescent device prepared by using the materials has a reduced starting voltage. The series of the materials have relatively good fluorescent quantum efficiency and electroluminescent efficiency, and relatively good film-forming property. Besides, the method for material synthesis and purification is simple and suitable for large-scale production. The organic electroluminescent materials are ideal selection for blue-light emitting materials of the organic electroluminescent device. Applications of the organic electroluminescent materials as luminescent materials independently or as main materials or doping dyes in luminescent layers are also in a protection range. The formula I is shown in the description.
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Paragraph 0074-0078; 0103-0105
(2019/11/21)
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- COMPOUND FOR ORGANIC ELECTRIC ELEMENT, ORGANIC ELECTRIC ELEMENT COMPRISING THE SAME AND ELECTRONIC DEVICE THEREOF
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In the present invention, provided is a compound represented by chemical formula 1. In addition, provided is an organic electric element which comprises a first electrode, a second electrode, and an organic matter layer. The organic matter layer is embedded between the first electrode and the second electrode, and includes a compound represented by chemical formula 1. If the organic matter layer of an organic electric element comprises the compound represented by chemical formula 1, driving voltage of the organic electric device can be reduced and luminous efficiency, color purity, and lifetime of the organic electric device can be enhanced.(110) Substrate(120) Positive electrode(130) Hole injection layer(140) Hole transport layer(141) Buffer layer(150) Light emitting layer(151) Light-emitting assisting layer(160) Electron transport layer(170) Electron injection layer(180) Negative electrodeCOPYRIGHT KIPO 2016
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- Effect of heterocycles on field-effect transistor performances of donor-acceptor-donor type small molecules
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Two D–A–D small molecules comprising triphenylamine and diketopyrrolopyrrole were synthesized having either furan or thiophene connected to the fused lactam ring. In this design, furan/thiophene diketopyrrolopyrrole acts as an acceptor and triphenylamine acts as a donor. Propeller shaped triphenylamine has its effect on packing, processability and plays a vital role in determining the π-π molecular orbital stacking in such compounds and thus the mobility of charge carriers. With TDPPT and FDPPT, maximum hole carrier mobility obtained is 2.88?×?10?3?cm2?V?1?s?1 and 1.60?×?10?3?cm2?V?1?s?1, respectively using bottom gate bottom contact field-effect transistor.
- Chini, Mrinmoy Kumar,Mahale, Rajashree Y.,Chatterjee, Shyambo
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p. 107 - 113
(2016/09/07)
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- One kind has electronic to the receptor structure of vinyl polymer main body material and its preparation and application method (by machine translation)
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The invention belongs to the field of photoelectric functional materials, in particular to a kind of by the electron donor group with the electron acceptor group are respectively functional modification of the PVK vinyl polymer main body material, and based on this polymer a series of optical, electrical, electrochemical performance characterization, we would be applied to the organic light-emitting field, has been succeeded in preparing a series of high-efficiency light-emitting device. Wherein the polymer material of the main body and PTPACzPO PVPPOK as an example, their traditional hole transporting material (polyvinyl carbazole) PVK as the skeleton, through a series of molecular modification, to obtain a more superior to the PVK carrier transmission performance. (by machine translation)
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Paragraph 0045; 0046
(2017/01/02)
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- Carbazole-based sensitizers for potential application to dye sensitized solar cells
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Two push-pull molecules employing carbazole and alkyl thiophene (CAR-THIOHX) or carbazole and triphenylamine (CAR-TPA) as donor moieties, with the cyanoacrylic group as the acceptor, have been designed and synthesized by simple organic transformations. Photophysical and electrochemical studies revealed the potential of these two systems in dye sensitized solar cells (DSSC). Under standard irradiation conditions, CAR-TPA and CAR-THIOHX exhibited 2.12 and 1.83% of overall power conversion efficiencies respectively. The moderate photovoltaic efficiency of the sensitizers has been attributed to the poor light absorption of the sensitizers in the visible region. Density functional theory (DFT) calculations have shown a strong intramolecular charge transfer character, with the HOMOs of both the sensitizers exclusively localized on the corresponding donor moieties and LUMOs on the cyanoacrylic acid acceptor. On the other hand, the calculated high dihedral angle between the carbazole donor and the phenyl bridge for these sensitizers impedes the conjugation along the dyes backbone, and thus leads to less extended and intense absorption spectra in the visible region. [Figure not available: see fulltext.]
- Duvva, Naresh,Kanaparthi, Ravi Kumar,Kandhadi, Jaipal,Marotta, Gabriele,Salvatori, Paolo,De Angelis, Filippo,Giribabu, Lingamallu
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p. 383 - 394
(2015/05/13)
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- Thermally activated delayed fluorescence of N-phenylcarbazole and triphenylamine functionalised tris(aryl)triazines
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N-phenyl carbazole and triphenylamine functionalized tris(aryl)triazines, as well as the corresponding mononers, have been synthesized by Suzuki cross-coupling reactions. The electronic, photophysical and electrochemical properties of these materials can be effectively tuned by manipulation of the constitution of acceptor and donor units. N-phenyl carbazole and triphenylamine functionalized 2,4,6-trisphenyl-1,3,5-triazines exhibit small energy gaps between the singlet and triplet (0.24 eV and 0.18 eV), and offer potential for application as thermally activated delayed fluorescence materials. The results are supported by time-dependent density functional theory calculations, delayed and time-resolved fluorescence data.
- Huang, Bin,Yin, Zhihui,Ban, Xinxin,Jiang, Wei,Dai, Yu,Zhang, Junya,Liu, Yuanyuan,Yang, Yaping,Sun, Yueming
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p. 141 - 148
(2015/03/18)
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