功能高分子材料教育部重点实验室

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陈永胜课题组 | DYES AND PIGMENTS

发布人:功能高分子材料教育部重点实验室    发布时间:2017/10/27   浏览次数:

Impact of end-capped groups on the properties of dithienosilole-based small molecules for solution-processed organic solar cells

Chen, XJ (Chen, Xianjie)1 ] Feng, HR (Feng, Huanran)2,3,4 ] Lin, ZJ (Lin, Zhijing)1 ] Jiang, ZW (Jiang, Zhaowei)1 ] He, T (He, Tian)1 ] Yin, SC (Yin, Shouchun)1 ] Wan, XJ (Wan, Xiangjian)2,3,4 ] Chen, YS (Chen, Yongsheng)2,3,4 ] Zhang, Q (Zhang, Qian)1 ] Qiu, HY (Qiu, Huayu)1 ]

DYES AND PIGMENTS, 2017, 147: 183-189

DOI: 10.1016/j.dyepig.2017.07.059

 WOS:000412612400022

Abstract

Two new acceptor-donor-acceptor small molecules DINDTS and DINCNDTS, with dithienosilole as a core unit and 1,3-indanedione (IN) or malononitrile derivative 1,3-indanedione (INCN) units as end-capped groups, respectively, have been designed and synthesized for solution-processable bulk-heterojunction (BHJ) solar cells. The impact of these two end-capped groups on their optical, electrochemical properties and photovoltaic performance was systematically studied. The optimal DINDTS:PC71BM based solar cells showed a short-circuit current density (J(sc)) of 13.50 mA cm(-2) and power conversion efficiency (PCE) of 6.60%. However, DINCNDTS:PC71BM based devices exhibited a poor PCE of 0.58% with a very low J(sc) of 1.82 mA cm(-2), which are mainly due to its poor morphology of active layers. (C) 2017 Elsevier Ltd. All rights reserved.