Side-chain effects on phenothiazine-based donor-acceptor copolymer properties in organic photovoltaic devices
作者:Young-Hoon Seo、Woo-Hyung Lee、Jong-Hyeok Park、Cheolbeom Bae、Yongtaek Hong、Jong-Wook Park、In-Nam Kang
DOI:10.1002/pola.25074
日期:2012.2.15
Solution‐processed field‐effect transistors fabricated with these polymers exhibited p‐type organic thin film transistor characteristics. The field‐effect mobilities of P1 and P2 were measured to be 1.0 × 10−4 and 7.5 × 10−5 cm2 V−1 s−1, respectively, with on/off ratios in the order of 104 for all polymers. A photovoltaic device in which a P2/PC71BM (1/3) blend film was used as the active layer exhibited an open‐circuit
通过Suzuki偶联反应合成了一系列新的基于吩噻嗪的供体-受体共聚物P1和P2。重均分子量(M wP1和P2的)分别为16,700和16,100,多分散指数分别为1.74和1.39。聚合物薄膜的紫外可见吸收光谱在318-320 nm,430-436 nm和527-568 nm范围内包含三个强吸收带。在320和430 nm处的吸收峰主要源自吩噻嗪基单体单元,而在527–568 nm处更长的波长吸收带归因于聚合物主链的有效共轭长度增加。用这些聚合物制成的溶液处理的场效应晶体管表现出p型有机薄膜晶体管的特性。P1和P2的场效应迁移率测量为1.0×10 -4和7.5×10 -5 cm 2 V -1 s对于所有聚合物,-1分别具有10 4数量级的开/关比。使用P2 / PC 71 BM(1/3)混合膜作为有源层的光伏器件的开路电压(V OC)为0.70 V,短路电流(J SC)为6.79 mA cm