- Synthesis and structure study of copolymers from thiadiazole fused indolocarbazole and dithienosilole
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We report synthesis and characterization of two D-A polymers (PSDT-C12 and PSDT-EH) with different side chains. Both polymers are based on alternate 12,13-dioctyl-indolo[2,3-a][1,2,5]thiadiazolo[3,4-c]carbazole (TDZIC) and dithienosilole derivative units in polymer main chain. We used TDZIC to enlarge the 2D conjugated plane of acceptor monomers by fusing benzothiadiazole (BT) unit with an indole unit having alkyl groups. PSDT-C12 exhibited 10 nm redshift compared to PSDT-EH in solid films, while their absorption spectra were almost identical in solutions. Since the backbone and side chains on the indolocarbazole group are the same, the redshift on PSDT-C12 could be resulted from the dodecyl (C12) side chain on the dithienosilole unit and different molecular weight between these two polymers. PSDT-C12 has a larger molecular weight than PSDT-EH. Therefore possibly both side chains and molecular weight contributed to the difference in the absorption spectra in solid films. The straight C-12 side chain has less steric hindrance than the branched EH side chain in solid films. PSDT-C12 has a longer main chain (larger molecule weight) than PSDT-EH, which can favour a more extended main chain interaction. The vibronic peak at 519 nm and shoulder at 563 nm in the PSDT-C12 film further confirmed stronger main chain interaction. Geometry optimization showed that head-tail (HT)-PSDT had a more twisting conjugated backbone with larger dihedral angle between dithienosilole unit and thiadiazole-fused ring compared to head-head/tail-tail (HH/TT)-PSDT.
- Chen, Qiliang,Zhang, Lianjie,Ebrahim, Shaker,Soliman, Moataz,Zhang, Cheng,Qiao, Qiquan
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- Conjugated polymers based on C, Si and N-bridged dithiophene and thienopyrroledione units: Synthesis, field-effect transistors and bulk heterojunction polymer solar cells
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A series of low band-gap conjugated polymers (PDTC, PDTSi and PDTP) containing electron-rich C-, Si-, and N-bridged bithiophene and electron-deficient thienopyrroledione units were synthesized via Stille coupling polymerization. All these polymers possess a low-lying energy level for the highest occupied molecular orbital (HOMO) (as low as -5.44 eV). As a result, photovoltaic devices derived from these polymers show high open circuit voltage (Voc as high as 0.91 V). These rigid polymers also possess respectable hole mobilities of 1.50 × 10-3, 6.0 × 10 -4, and 3.9 × 10-4 cm2 V-1 s-1 for PDTC, PDTSi, and PDTP, respectively. The combined high V oc and good hole mobility enable bulk hetero-junction photovoltaic cells to be fabricated with relatively high power conversion efficiency (PCE as high as 3.74% for the PDTC-based device). The Royal Society of Chemistry 2011.
- Zhang, Yong,Zou, Jingyu,Yip, Hin-Lap,Sun, Ying,Davies, Josh A.,Chen, Kung-Shih,Acton, Orb,Jen, Alex K.-Y.
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- FUSED RING DERIVATIVE AND ORGANIC SOLAR CELL COMPRISING THE SAME
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The present invention relates to a condensed cyclic derivative represented by chemical formula 1, and an organic solar cell containing the same. According to an embodiment of the present invention, the condensed cyclic derivative exhibits excellent coating properties by having a hydroxyl group, an alkyl group, an alkoxy group, and a sulfide group as a substituent.COPYRIGHT KIPO 2017
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- Synthesis and photophysical properties of semiconductor molecules D1-A-D2-A-D1-type structure based on derivatives of quinoxaline and dithienosilole for organics solar cells
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A novel small molecule with D1-A-D2-A-D1 structure denoted as DTS(QxHT2)2 based on quinoxaline acceptor and dithienosilone donor units was synthesized and its optical and electrochemical properties were investigated. The thin film of DTS(QxHT2)2 showed a broad absorption profile covering the solar spectrum from 350?nm to 780?nm with an optical bandgap of 1.63?eV. The energy levels estimated from the cyclic voltammetry indicate that this small molecule is suitable as donor along with PC71BM as acceptor for the fabrication solution processed bulk heterojunction solar cells for efficient exciton dissociation and high open circuit voltage. The organic solar cells based on optimized DTS(QxHT2)2:PC71BM active layers processed with chloroform and DIO/CF showed overall power conversion efficiency of 3.16% and 6.30%, respectively. The higher power conversion efficiency of the solar cell based on the DIO/CF processed active layer is attributed to enhanced short circuit photocurrent and fill factor may be related to better phase separation between donor and acceptor in the active layer and more balanced charge transport, induced by the solvent additive. The power conversion efficiency of the organic solar cell was further improved up to 7.81% based on active layer processed with solvent additive, using CuSCN as hole transport layer instead of PEDOT:PSS and mainly attributed to increased fill factor and open circuit voltage due the formation of better Ohmic contact between the active layer and the CuSCN layer.
- Keshtov,Godovsky, D. Yu,Kuklin,Nicolaev,Lee,Lim,Lee,Koukaras,Sharma, Ganesh D.
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p. 361 - 370
(2016/11/09)
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- Electronic area comprising rich and lean of electronic area of the organic compounds and their use in the application of electronic (by machine translation)
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The donor-acceptor strategy based on a semiconductive or conductive organic small molecule, oligomer and polymer, characterized in that the receptor unit core of heavy section 16 group element (Se and Te). Small molecule, oligomer and polymer can have the
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Paragraph 0087; 0088
(2016/10/10)
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- Synthesis and photovoltaic properties of dithieno[3,2-b:2′,3′-d]silole-based conjugated copolymers
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A new low band gap conjugated polymer containing a dithieno[3,2-b:2′,3′-d]silole (DTS) donor unit and a fluorinated 4,7-dithien-2-yl-2,1,3-benzothiadiazole (DTffBT) acceptor unit was synthesized by Stille cross-coupling polymerization. The structural and thermal properties of the copolymer were characterized by using nuclear magnetic resonance, gel permeation chromatography and thermogravimetric analysis. This copolymer shows good thermal stability with a decomposition temperature of 325°C and a broad absorption band from 300 to 800 nm. The HOMO and LUMO energy levels were estimated to be -5.28 and -3.66 eV, with an electrochemical band gap of 1.62 eV. Efficient bulk heterojunction solar cells were fabricated by blending this copolymer with PC71BM, and they reached a power conversion efficiency up to 5.26% under 100 mW cm-2 AM 1.5 illumination, indicating that PDTS-DTffBT is a potential candidate for polymer solar cells.
- Wen, Shanpeng,Wang, Chen,Ma, Pengfei,Zhao, Ying-Xuan,Li, Chang,Ruan, Shengping
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p. 13794 - 13800
(2015/06/30)
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- Synthesis and photovoltaic properties of A-D-A type non-fullerene acceptors containing isoindigo terminal units
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Four solution-processable acceptor-donor-acceptor (A-D-A) structured organic molecules with isoindigo as terminal acceptor units and different aromatic rigid planar cores such as indacenodithiophene (IDT), dithienosilole (DTS), anthracene, and pyrene as d
- Liu, Xin,Xie, Yuan,Cai, Xinyi,Li, Yunchuan,Wu, Hongbin,Su, Shi-Jian,Cao, Yong
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p. 107566 - 107574
(2016/01/09)
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- PROCESS FOR PRODUCING FUSED-RING AROMATIC COMPOUND, AND CONJUGATED POLYMER
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The invention addresses a problem of purifying a monomer to be a precursor according to a simpler and milder method so as to obtain a polymer having a higher molecular weight. The invention relates to a method for producing a condensed polycyclic aromatic compound having n active groups (wherein n is an integer of 1 or more and 4 or less), which comprises bringing a composition containing the condensed polycyclic aromatic compound and a solvent into contact with zeolite.
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Paragraph 0212; 0213; 0214; 0215; 0216; 0217
(2014/09/29)
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- HETEROCYCLIC QUINOID THIOPHENE ORGANIC PHOTOELECTRIC MATERIAL, PREPARATION METHOD AND APPLICATION THEREOF
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A heterocyclic quinoid thiophene organic photoelectric material, which comprises a compound represented by formula (1), in which R1, R2, R5 and R6, which may be identical or different, are H or C1-C20 alkyl or alkoxyl; R3 and R4, which may be identical or different, are C1-C20 alkyl or alkoxyl; a and b, which may be identical or different, are integer of 1-12; X is Si or C. A preparation method of said heterocyclic quinoid thiophene organic photoelectric material and the use thereof are also disclosed.
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- HETEROCYCLOQUINOID THIOPHENE ORGANIC PHOTOELECTRIC MATERIAL, PREPARATION METHOD AND USE THEREOF
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A heterocyclic quinoid thiophene organic photoelectric material, which comprises a compound represented by formula (1), in which R1, R2, R5 and R6, which may be identical or different, are H or C1-C20 alkyl or alkoxyl; R3 and R4, which may be identical or different, are C1-C20 alkyl or alkoxyl; a and b, which may be indentical or different, are integer of 1-12; X is Si or C. A preparation method of said heterocyclic quinoid thiophene organic photoelectric material and the use thereof are also disclosed.
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- ORGANIC ELECTRONIC DEVICES AND POLYMERS, INCLUDING PHOTOVOLTAIC CELLS AND DIKETONE-BASED POLYMERS
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Polymers which can be used in p-type materials for organic electronic devices and photovoltaic cells. Compounds, monomers, dimers, trimers, and polymers comprising formula (I); Good photovoltaic efficiency and lifetime can be achieved. The R group can provide solubility, environmental stability, and fine tuning of spectroscopic and/or electronic properties. Different polymer microstructures can be prepared which encourage multiple band gaps and broad and strong absorptions. The carbonyl can interact with adjacent thiophene rings to provide backbone with rigidity, induce planarity, and reduce and/or eliminate intramolecular chain twisting defects. Polymers comprising benzodithiophene and/or benzothiadiazole structures can show particularly high performance.
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Page/Page column 51
(2011/04/14)
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- Synthesis, characterization, and photovoltaic properties of a low band gap polymer based on silole-containing polythiophenes and 2,1,3-benzothiadiazole
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A new low band gap silole-containing conjugated polymer, PSBTBT, was designed and synthesized. Photovoltaic properties of PSBTBT were initially investigated, and an average power conversion efficiency (PCE) of 4.7 % with a best PCE of 5.1 % was recorded under illumination (AM 1.5G, 100 mW/cm2). The response range of the device covers the whole visible range from 380 to 800 nm. These results indicate that PSBTBT is a promising polymer material for applications in polymer solar cells. Copyright
- Hou, Jianhui,Chen, Hsiang-Yu,Zhang, Shaoqing,Li, Gang,Yang, Yang
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p. 16144 - 16145
(2009/05/08)
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