- Improving photovoltaic properties of the linear A-Ar-A type small molecules with rhodanine by extending arylene core
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In order to efficiently tune photovoltaic performance, a series of linear A-Ar-A type small molecules (SMs) of (DRCN3T)2Ar were designed and synthesized, which contain the same terminal of 2-(1,1-dicyanomethylene) rhodanine (DRCN) and π-bridged space of 5-vinyl-trithiophene (3T), but different central arylene (Ar) unit, respectively. Significantly extending film absorption and increasing hole mobility were obtained in these SMs with enlarging Ar units from phenylene (Ph), naphthylene (Nap) to anthrylene (Ant). As a result, photovoltaic properties were remarkably improved in these SM/PC71BM based solution-processing organic solar cells (OSCs) by enlarging Ar units in (DRCN3T)2Ar. The highest power conversion efficiency of 5.15% with a short-circuit current density of 11.34 mA cm?2 was obtained in the (DRCN3T)2Ant based device, which is three times of that in the (DRCN3T)2Ph-based device. Our work further indicates that properly extending Ar core could be beneficial to improve photovoltaic properties for the A-Ar-A type SMs.
- Liu, Bin,Duan, Linrui,Chen, Jianhua,Duan, Xiongwei,Lei, Ting,Cai, Yufeng,Wang, Qiong,Tan, Hua,Yang, Renqiang,Zhu, Weiguo
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- Series of Quinoidal Methyl-Dioxocyano-Pyridine Based π-Extended Narrow-Bandgap Oligomers for Solution-Processed Small-Molecule Organic Solar Cells
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Small molecules with narrow bandgap of 71BM, showing the higher hole mobility and promising electric performance. (Graph Presented).
- Tang, Ailing,Zhan, Chuanlang,Yao, Jiannian
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- Acceptor-donor-acceptor small molecules containing benzo [1,2-b:4,5-b′]dithiophene and rhodanine units for solution processed organic solar cells
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Two novel solution-processed acceptor-donor-acceptor (A-D-A) structured organic molecules with 5,8-disubstituted benzo[1,2-b:4,5-b′]dithiophene (BDT or BDTT) as central and donor units, 2-(1,1-dicyanomethylene)rhodanine (DCRD) as acceptor unit and terminal group, and trithiophene (T3) as π-bridges, D(T3-DCRD)-BDT and D(T3-DCRD)-BDTT, are designed and synthesized for the application as donor materials in organic solar cells (OSCs). Both compounds exhibit broad absorption covering the wavelength range 300-750 nm and the relatively lower HOMO energy levels from -5.39 to -5.46 eV. D(T3-DCRD)-BDTT demonstrates strong absorbance and higher hole mobility than that of D(T3-DCRD)-BDT. The power conversion efficiency (PCE) values of the OSCs based on the compounds/PC61BM (1:1, w/w) are 1.10% for D(T3-DCRD)-BDT and 1.94% for D(T3-DCRD)-BDTT, under the illumination of AM. 1.5G, 100 mW/cm-2. Furthermore, the high open-circuit voltage (Voc) values are 0.93 V for D(T3-DCRD)-BDT and 0.96 V for D(T3-DCRD)-BDTT, respectively. It indicates that incorporating DCRD as an acceptor unit into D-A-D-type small molecule has proven to be promising candidates for high efficiency solution processed OSCs.
- Fan, Qunping,Li, Min,Yang, Pingao,Liu, Yu,Xiao, Manjun,Wang, Xiangdong,Tan, Hua,Wang, Yafei,Yang, Renqiang,Zhu, Weiguo
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- Chirality inversion in hydrogen-bonded rhodanine-oligothiophene derivatives by solvent and temperature
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The self-assembly process of hydrogen-bonded quinquethiophene-rhodanine derivatives has been explored as a function of solvent and temperature. We demonstrate the divergent supramolecular chirality emerging from a single enantiomer by subtle changes in solvent mixtures and sample preparation protocol. Spectroscopic techniques have proved the presence of aggregates where H-bonding interactions play a crucial role.
- Garcia, Ana M.,Ruiz-Carretero, Amparo
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supporting information
p. 529 - 532
(2022/01/22)
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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 ring and an organic solar cell comprising the same. The organic solar cell of the present invention comprises: a first electrode; a second electrode facing the first electrode; and one or more organic layers formed between the first electrode and the second electrode, and including a photoactivity layer, wherein one or more layers of the organic layers comprise the condensed ring of the present invention. By using the condensed ring of the present invention, it is expected to improvement in efficiency, and lifespan of a device caused by properties such as thermal stability of the condensed ring.COPYRIGHT KIPO 2017
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Paragraph 0194; 0205; 0206
(2017/04/19)
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- ORGANIC DYE FOR A DYE SENSITIZED SOLAR CELL
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An organic dye for a Dye Sensitized Solar Cell (DSSC) which comprises at least one electron acceptor unit and at least one ττ-conjugated unit. Said organic dye is particularly useful in a dye sensitized photoelectric conversion element which, in turn, may be used in a dye sensitized solar cell (DSSC).
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(2017/12/15)
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- The photoelectric material preparation
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A photoelectric active compound selected from the compounds having general formulas (1)-(3), and preparation method and uses thereof.
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Paragraph 0151-0154
(2016/12/01)
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- ORGANIC DYE FOR A DYE-SENSITIZED SOLAR CELL
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Organic dye for a dye-sensitized solar cell (DSSC) comprising at least one electron-acceptor unit and at least one π-conjugated unit. Said organic dye is particularly useful in a dye-sensitized photoelectric transformation element which, in its turn, can be used in a dye-sensitized solar cell (DSSC).
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Paragraph 0131; 0133
(2016/10/04)
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- Photoelectric materials and preparation thereof
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Receptor type oligothiopene compounds, methods of preparing the compounds, and use of the compounds in photoelectric materials.
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(2015/11/30)
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- Design, synthesis and photophysical properties of A-D-A-D-A small molecules for photovoltaic application
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A series of linear-conjugated small molecule compounds featured with the acceptor-donor-acceptor-donor-acceptor (A-D-A-D-A) structure were designed, synthesized and characterized. The films of the compounds showed a broad UV-Vis absorption range of 300-800 nm with high molar absorption coefficient of more than 1.0 × 104 cm-1. Their hole-mobility can be as high as 1.0 × 10-3 cm2 V-1 s-1. The compounds have a compatible HOMO energy level of -5.0 eV to PC71BM and a high solubility up to 20 mg mL-1 in chloroform. Therefore, compounds can blend with PC71BM in the chloroform and form an active layer for a photovoltaic cell device by spin-coating of the blend solution. A maximum power conversion efficiency of 3.2% was achieved with the DERH3TT solar cell device. These results indicate that the A-D-A-D-A small molecules with electron-withdrawing dyes as terminals are promising candidates for the high efficiency solution processed organic photovoltaic cells.
- Yan, Weibo,Zhang, Qian,Qin, Qingsong,Ye, Senyun,Lin, Yuanwei,Liu, Zhiwei,Bian, Zuqiang,Chen, Yongsheng,Huang, Chunhui
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- ORGANIC DYE FOR A DYE-SENSITIZED SOLAR CELL
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Organic dye for a dye-sensitized solar cell (DSSC) comprising at least one electron-acceptor unit and at least one π-conjugated unit. Said organic dye is particularly useful in a dye-sensitized photoelectric transformation element which, in its turn, can be used in a dye-sensitized solar cell (DSSC).
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(2013/11/18)
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- Effect of molecular weight on electronic, electrochemical and spectroelectrochemical properties of poly(3,3″-dioctyl-2,2′5′, 2″-terthiophene)
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Poly(3,3″-dioctyl-2,2′5′,2″-terthiophene), obtained from its corresponding monomer by oxidative polymerization with FeCl 3, has been fractionated into five fractions of reduced polydispersity, covering the Mn range from 1.50 kDa to 10.50 kDa (measured vs. polystyrene standards). The effect of Mn on spectroscopic, electrochemical, spectroelectrochemical and electrical transport properties has been investigated. Fractions of growing Mn show an increasing bathochromic shift of the band originating from the π-π* transition in the neutral polymer with the appearance of a clear vibrational structure for the two highest molecular fractions. The onset of oxidative doping determined from the cyclic voltammogram shifts towards lower potentials with increasing molecular weight. A similar trend is observed for doping induced near infrared bands, which shift towards lower energies (higher wavelengths) with increasing molecular weight and appear at lower potentials in spectroelectrochemical experiments. Finally, a comparison of the FET mobility in two transistors fabricated under identical conditions from polymer fractions differing in their molecular weight shows that a ca. fourfold increase of M n (from 2.40 kDa to 10.50 kDa) results in a two orders of magnitude increase in the carriers' mobility (from μsat = 4 × 10 -5 cm2 V-1 s-1 to μsat = 2 × 10-3 cm2 V-1 s-1). The obtained results underline the importance of the control of the macromolecular parameters in the preparation of electronic and electrochemical devices from poly(3,3″-dioctyl-2,2′5′,2″-terthiophene). The Royal Society of Chemistry 2006.
- Pokrop, Rafal,Verilhac, Jean-Marie,Gasior, Anna,Wielgus, Ireneusz,Zagorska, Malgorzata,Travers, Jean-Pierre,Pron, Adam
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p. 3099 - 3106
(2007/10/03)
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- Novel photoluminescent polymers containing oligothiophene and m-phenylene-1,3,4-oxadiazole moieties: Synthesis and spectroscopic and electrochemical studies
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Three conjugated polymers containing oligothiophene units (from one to three thiophene rings) and aromatic 1,3,4-oxadiazole moieties have been successfully synthesized. The polymer structures were characterized and confirmed by 1H and 13C NMR, FT-IR, and elemental analysis. Thermogravimetric analysis demonstrated that the polymers are highly thermal stable. Tunable absorption (from 342 to 428 nm) and fluorescence (from 411 to 558 nm) properties of polymers were observed: The electrochemical investigation indicated that the LUMO and HOMO energy levels of the new polymers could be adjusted. It was also revealed by the electrochemical analysis that the polymers have good charge injection properties for both p-type and n-type charge carriers, as well as good color tunable luminescence and film-forming properties, which makes them potentially useful for fabricating efficient light-emitting devices.
- Meng,Huang
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p. 3894 - 3901
(2007/10/03)
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