- Synthesis and dye sensitized solar cell applications of Bodipy derivatives with bis-dimethylfluorenyl amine donor groups
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Three Bodipy dyes with strong absorptivities in the visible and near infrared regions were designed, synthesized and their potential as photosensitizers for liquid electrolyte-based dye sensitized solar cells have been evaluated. For the first time Bodipy derivatives with bis-dimethylfluorenyl amine donor groups which were known for their bulky structures as donor groups have been used together. We altered our mostly used triphenylamine group with these and investigated the dye-sensitized solar cell efficiencies of this new class of Bodipy dyes.
- ?akmak, Yusuf,Kolemen, Safacan,Buyuktemiz, Muhammed,Dede, Yavuz,Erten-Ela, Sule
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- Aromatic compound and organoelectroluminescent device comprising the compound
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The present invention relates to an aromatic compound and an organic electroluminescent device including the same. The aromatic compound is represented by chemical formula 1, and the organic electroluminescent device is excellent in driving voltage, luminous efficiency and lifetime characteristics.
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Paragraph 0772-0778
(2021/08/31)
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- Aromatic compound and organoelectro luminescent device comprising the compound
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The present invention relates to an aromatic compound denoted by chemical formula 1, and an organic electroluminescent device comprising the compound. The organic electroluminescent device comprising the aromatic compound by the present invention has low driving voltage, and excellent lifetime properties and luminance efficiency.
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Paragraph 0391; 0397-0401
(2020/12/08)
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- Preparation method of photoelectric material intermediate (by machine translation)
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The invention discloses a preparation method of a photoelectric material intermediate, and is not reported in China at present. To the preparation method provided by the invention, the raw 2 material fluorene -9 is used as a series of operations such as single iodination and the C-N acenyman coupling, crude purification 9 and 9 - the like 4 -2 - 99.0%. The preparation method provided by the invention is simple to operate and suitable for industrial production. (by machine translation)
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Paragraph 0008; 0012; 0013
(2019/10/08)
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- Heterocyclic com pounds and organic light-emitting diode including the same
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The present invention relates to novel heterocyclic compounds of chemical formula 1 and an organic electroluminescent device containing the same as a light emitting material and, more specifically, to stable heterocyclic compounds with superior light emitting properties such as driving voltage and light emitting efficiency; and an organic electroluminescent device containing the same. Also, the present invention provides an organic electroluminescent device comprising an anode, a cathode, and layers which are inserted between the anode and the cathode and contain the heterocyclic compounds of chemical formula 1.
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Paragraph 0330; 0331-0336
(2019/11/29)
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- Triarylamine-based dual-function coadsorbents with extended π-conjugation aryl linkers for organic dye-sensitized solar cells
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Triarylamine-based dual-function coadsorbents containing a carboxylic acid acceptor linked by extended π-conjugation aryl linkers (e.g., phenylene: HC-A3, naphthalene: HC-A4 and anthracene: HC-A5) were newly designed and synthesized. They were used as coadsorbents in organic dye-sensitized solar cells (DSSCs) based on a porphyrin dye (hexyloxy-biphenyl-ZnP-CN-COOH (HOP)). For comparison, the π-conjugated phenyl linker (HC-A3) previously developed by our group was also used as a coadsorbent. The structural effects on the photophysical and electrochemical properties and DSSC performance were systematically investigated. As a result, the DSSCs based on HC-A4 and HC-5 displayed power conversion efficiencies (PCEs) of 8.2% and 5.1%, respectively, while the HC-A3-based DSSC achieved a PCE of 7.7%. In the case of HC-A4, both the short-circuit photocurrent densities (Jsc) and open-circuit voltages (Voc) of DSSCs were simultaneously improved to a large extent due to the more effective prevention of π-π stacking of organic dye molecules and the better light-harvesting effect at short wavelengths. The HC-A5-based DSSC exhibited a much lower short-circuit current (Jsc) and open-circuit voltages (Voc) compared to the HC-A4-based DSSC, due to the fact that the dihedral angle of the π-conjugated linkers was too high for electron injection into the TiO2 conduction band (CB) level. This had a reduced effect on preventing the π-π stacking of dye molecules, resulting in lower Jsc and Voc values.
- Choi, In Taek,You, Ban Seok,Eom, Yu Kyung,Ju, Myung Jong,Choi, Won Seok,Kang, Sung Ho,Kang, Min Soo,Seo, Kang Deuk,Hong, Ji Yeoun,Song, Sang Hyun,Yang, Ji-Woon,Kim, Hwan Kyu
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supporting information
p. 3316 - 3326
(2015/02/19)
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- Compounds having hole conducting property, co-adsorbent body comprising same, and dye-sensitized solar cell comprising the co-adsorbent body
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An object of the present invention is to provide a novel concept coadsorbent that can be used instead of conventionally-used deoxycholic acid (DCA). The present invention provides a coadsorbent having hole conduction characteristics, including the compound represented by Formula 3, and provides a dye-sensitized solar cell including a light absorbing layer including the coadsorbent having hole conduction characteristics. The photocurrent and photovoltage of the dye-sensitized solar cell can be improved because it includes a light absorbing layer including the coadsorbent having hole conduction characteristics.
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Paragraph 0035; 0070; 0071
(2014/04/04)
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- A zinc porphyrin sensitizer modified with donor and acceptor groups for dye-sensitized solar cells
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In this article, we have designed and synthesized a novel donor-π-acceptor (D-π-A) type porphyrin-based sensitizer (denoted UI-5), in which a carboxyl anchoring group and a 9,9-dimethyl fluorene were introduced at the meso-positions of porphyrin ring via phenylethynyl and ethynyl bridging units, respectively. Long alkoxy chains in ortho-positions of the phenyls were supposed to reduce the degree of dye aggregation, which tends to affect electron injection yield in a photovoltaic cell. The cyclic voltammetry was employed to determine the band gap of UI-5 to be 1.41 eV based on the HOMO and LUMO energy levels, which were estimated by the onset oxidation and reduction potentials. The incident monochromatic photon-to-current conversion efficiency of the UI-5 DSSC assembled with double-layer (20 nm-sized TiO2/400 nm-sized TiO2) film electrodes appeared lower upon overall ranges of the excitation wavelengths, but exhibited a higher value over the NIR ranges (λ = 650-700 nm) compared to the common reference sensitizer N719. The UI-5-sensitized cell yielded a relatively poor device performance with an overall conversion efficiency of 0.74% with a short circuit photocurrent density of 3.05 mA/cm2, an open circuit voltage of 0.54 mV and a fill factor of 0.44 under the standard global air mass (AM 1.5) solar conditions. However, our report about the synthesis and the photovoltaic characteristics of a porphyrin-based sensitizer in a D-π - A structure demonstrated a significant complex relationship between the sensitizer structure and the cell performance.
- Lee, Seewoo,Sarker, Ashis K.,Hong, Jong-Dal
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p. 3052 - 3058
(2014/12/11)
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- Stepwise co-sensitization as a useful tool for enhancement of power conversion efficiency of dye-sensitized solar cells: The case of an unsymmetrical porphyrin dyad and a metal-free organic dye
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A tertiary arylamine compound (DC), which contains a terminal cyano-acetic group in one of its aryl groups, and an unsymmetrical porphyrin dyad of the type Zn[Porph]-L-H2[Porph] (ZnP-H2P), where Zn[Porph] and H2[Porph] are metallated and free-base porphyrin units, respectively, and L is a bridging triazine group functionalized with a glycine moiety, and were synthesized and used for the fabrication of co-sensitized dye-sensitized solar cells (DSSCs). The photophysical and electronic properties of the two compounds revealed spectral absorption features and frontier orbital energy levels that are appropriate for use in DSSCs. Following a stepwise co-sensitization procedure, by immersing the TiO2 electrode in separate solutions of the dyes in different sequence, two co-sensitized solar cells were obtained: devices C (ZnP-H2P/DC) and D (DC/ZnP-H 2P).The two solar cells were found to exhibit power conversion efficiencies (PCEs) of 6.16% and 4.80%, respectively. The higher PCE value of device C, which is also higher than that of the individually sensitized devices based on the ZnP-H2P and DC dyes, is attributed to enhanced photovoltaic parameters, i.e. short circuit current (Jsc = 11.72 mA/cm2), open circuit voltage (Voc = 0.72 V), fill factor (FF = 0.73), as it is revealed by photovoltaic measurements (J-V curves) and by incident photon to current conversion efficiency (IPCE) spectra of the devices, and to a higher total dye loading. The overall performance of device C was further improved up to 7.68% (with Jsc = 13.45 mA/cm2, Voc = 0.76 V, and FF = 0.75), when a formic acid treated TiO 2 ZnP-H2P co-sensitized photoanode was employed (device E). The increased PCE value of device E has been attributed to an enhanced Jsc value (=13.45 mA/cm2), which resulted from an increased dye loading, and an enhanced Voc value (=0.76 V), attributed to an upward shift and increased of electron density in the TiO 2 CB. Furthermore, dark current and electrochemical impedance spectra (EIS) of device E revealed an enhanced electron transport rate in the formic acid treated TiO2 photoanode, suppressed electron recombination at the photoanode/dye/electrolyte interface, as well as shorter electron transport time (τd), and longer electron lifetime (τe).
- Sharma,Zervaki,Angaridis,Vatikioti,Gupta,Gayathri,Nagarjuna,Singh, Surya Prakash,Chandrasekharam,Banthiya, Ajita,Bhanuprakash,Petrou,Coutsolelos
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p. 1324 - 1337
(2014/05/06)
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- Quinoxaline Derivative, And Light-Emitting Element And Light-Emitting Device Using Quinoxaline Derivative
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An object is to provide a novel organic compound capable of visible light emission. In particular, an object is to provide a novel organic compound that exhibits a broad emission spectrum when it is used for a light-emitting element. In addition, an object is to provide a light-emitting element and a light-emitting device that gives white light emission with an excellent color rendering property. The quinoxaline derivative represented by General Formula (1) is provided. Since the quinoxaline derivative represented by General Formula (1) is capable of emitting visible light, it can be favorably used for a light-emitting element. In particular, since the quinoxaline derivative represented by General Formula (1) exhibits a broad emission spectrum when it is used for a light-emitting element, by using it for a light-emitting element, a light-emitting element that gives white light emission with an excellent color rendering property can be obtained.
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Page/Page column 34
(2008/06/13)
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- DYE-SENSITIZED PHOTOELECTRIC CONVERSION DEVICE
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Disclosed is a photoelectric conversion device wherein a methine dye represented by the formula (1) below is supported by a thin film of oxide semiconductor particles arranged on a substrate. Also disclosed is a solar cell manufactured by using such a photoelectric conversion device. (In the formula (1), n represents an integer of 0-5; m represents an integer of 0-5; R1-R4 independently represent a hydrogen atom, an optionally substituted aromatic residue, an optionally substituted aliphatic hydrocarbon residue or the like; X and Y independently represent a hydrogen atom; an optionally substituted aromatic residue, an optionally substituted aliphatic hydrocarbon residue or the like; Z represents an oxygen atom, a sulfur atom or the like; A1, A2, A3, A4 and A5 independently represent a hydrogen atom, an optionally substituted aromatic residue, an optionally substituted aliphatic hydrocarbon residue or the like; and rings a, b and c may be substituted.)
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Page/Page column 62
(2008/12/08)
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