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首页> 外文期刊>Polymers >Novel Two-Dimensional Conjugated Polymer Containing Fluorinated Bithiophene as Donor and Benzoselenodiazole as Acceptor Units with Vinyl-Terthiophene Pendants for Polymer Photovoltaic Cells
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Novel Two-Dimensional Conjugated Polymer Containing Fluorinated Bithiophene as Donor and Benzoselenodiazole as Acceptor Units with Vinyl-Terthiophene Pendants for Polymer Photovoltaic Cells

机译：含有氟化二硫代噻吩的新型二维共轭聚合物作为供体和苯并苯甲酸苯并唑作为具有乙烯基噻吩垂侧的聚合物光伏电池的受体单元

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Novel two-dimensional conjugated copolymer, abbreviated as PDTBSeVTT-2TF, containing electron-deficient 4,7-di(thiophen-2-yl)benzo[ c ][1,2,5]selenodiazole (DTBSe) unit, conjugated vinyl-terthiophene (VTT) side chain and 3,3′-difluoro-2,2′-bithiophene (2TF) was designed and synthesized using microwave-assisted Stille cross-coupling polymerization. UV–visible absorption and cyclic voltammetry studies revealed that this copolymer possesses a strong and broad absorption in the range of 300–800 nm and a narrow optical bandgap ( E g ) of 1.57 eV with low-lying HOMO and LUMO energy levels. Further, the bulk heterojunction polymer solar cells (PSCs) were fabricated using PDTBSeVTT-2TF as donor and [6,6]-phenyl-C 71 -butyric acid methyl ester (PC 71 BM) as acceptor with an inverted device structure of ITO/ZnO/PDTBSeVTT-2TF:PC 71 BM/V 2 O 5 /Ag. The processing temperature of blend solution for preparing PDTBSeVTT-2TF:PC 71 BM active layer showed obvious impact on the photovoltaic performance of solar devices. The cell fabricated from the blend solution at 65 °C exhibited enhanced power conversion efficiencies (PCE) of 5.11% with a J sc of 10.99 mA/cm ?2 compared with the one at 50 °C, which had a PCE of 4.69% with a J sc of 10.10 mA/cm ?2 . This enhancement is due to the dissolution of PDTBSeVTT-2TF clusters into single molecules and small aggregates, improving the miscibility between the polymer and PC 71 BM and thus increasing the donor/acceptor interface.
机译：新型二维共轭共聚物，缩写为PDTBSEVTT-2TF，含有电子缺陷4,7-DI（噻吩-2-基）苯并[C] [1,2,5]硒二唑（DTBSE）单位，共轭乙烯基 - 萜烯（VTT）侧链和3,3'-二氟-2,2'-二硫代丙烯（2TF）设计和合成使用微波辅助STILLE交叉偶联聚合。 UV可见的吸收和循环伏安法研究表明，该共聚物在300-800nm的范围内具有强烈且宽的吸收和1.57eV的窄光学带隙（E G），具有低躺线的HOMO和LUMO能量水平。此外，使用PDTBSEVTT-2TF作为供体和[6,6] - 苯基-C 71-与酸甲基酯（PC 71 BM）作为受体，用ITO /的倒置器件结构制造所述致荷杂结的聚合物太阳能电池（PSC）。 ZnO / PDTBSEVTT-2TF：PC 71 BM / V 2 O 5 / AG。制备用于制备PDTBSEVTT-2TF的混合溶液的加工温度：PC 71 BM有源层对太阳能器件的光伏性能显而易见。从65℃制造的细胞在65℃下表现出增强的功率转换效率（PCE）为5.11％，J SC为10.99 mA / cm 2 2，与50°C为50℃，其PCE为4.69％ J SC为10.10 mA / cm？2。这种增强是由于PDTBSEVTT-2TF簇的溶解成单分子和小聚集体，提高了聚合物和PC 71 BM之间的混合物，从而增加了供体/受体界面。

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