All-polymer solar cells based on side-chain-isolated polythiophenes and poly(perylene diimide-alt-dithienothiophene)
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- 作者：Xia-Xia Liao ; Xingang Zhao ; Zhi-Guo Zhang ; Hui-Qiong Wang ; Xiaowei Zhan ; Yongfang Li ; Jizheng Wang ; Jin-Cheng Zheng
- 关键词：All polymer solar cell ; Power conversion efficiency ; Ideality factor ; Two dimensional conjugated polymers
- 刊名：Solar Energy Materials and Solar Cells
- 出版年：2013
- 出版时间：October, 2013
- 年：2013
- 卷：117
- 期：Complete
- 页码：336-342
- 全文大小：8296 K
文摘
Two dimensional conjugated polymers have emerged as excellent polymer donor components in recent years. Here, all-polymer solar cells based on two conjugated side-chain isolated polythiophene derivatives (PT4TV and PT4TV-C) as donors and perylene diimide (PDI)-based polymer (PPDI-DTT) as acceptor are fabricated and investigated in detail. The structure similarity of the two polymers provides more insightful structure-property relationships. PT4TV based device displays a power conversion efficiency (PCE) of 0.99 % , higher than that of PT4TV-C based device (0.55 % ). The high fill factor of larger than 50 % in PT4TV based device is ascribed to the balanced hole and electron mobility of the donor and the acceptor. By adding chloronaphthalene solvent in PT4TV: PPDI-DTT solution, the PCE of PT4TV based solar cells is enhanced to 1.17 % . Such improvement is interpreted in terms of the refined morphology of the film and ideality factor of the solar cell diode.