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	Significant Enhancement of Polymer Solar Cell Performance via Side-Chain Engineering and Simple Solvent Treatment
	Ge ZY(葛子义) ; Yang Wang,†,‡ Ying Liu,† Shaojie Chen,† Ruixiang Peng,† and Ziyi Ge*,†
刊名	Chemistry of Materials
	2013-07-09
卷号	3期号:15页码:3196—3204
通讯作者	葛子义
合作状况	李雨桐
中文摘要	Rational design and synthesis of polymeric semiconductors is critical to the development of polymer solar cells (PSCs). In this work, a new series of benzodithiophene？ difuranylbenzooxadiazole-based donor？acceptor co-polymersnamely, PBDT-DFBO, PBDTT-DFBO, and PBDTF-DFBO, with various side groupshave been developed for bulk-heterojunction PSCs. These side-group substituents provide the opportunity to tailor the opto-electrical properties of the polymers. In addition, we show that the reduction of the bandgap of polymers and the enhancement of charge mobility in the devices can be accomplished concurrently by substituting the alkylthienyl side group with its furan counterpart. In the preliminary investigation, one could obtain PSCs with a power conversion efficiency (PCE) of 2.1% for PBDT-DFBO with an alkoxyl side chain, 2.2% for PBDTT-DFBO with an alkylthienyl side group, and 3.0% for PBDTF-DFBO with an alkylfuranyl side group. Further optimizing the performance of the devices was conducted via a simple solvent treatment. The PSCs based on PBDTF-DFBO:PC71BM could even achieve 7.0% PCE, which exhibited an enhancement of 130%. To the best of our knowledge, the value of 7.0% is the highest efficiency for furan-containing PSCs to date and is also comparable with the hitherto reported highest efficiency of the single junction PSCs. Through a combination of testing charge transport by the space-charge limited current (SCLC) model and examining the morphology by atomic force microscopy (AFM), we found that the effects of solvent treatment on the improved performance originate from higher and more balanced charge transport and the formation of fiberlike interpenetrating morphologies, which are beneficial to the increase of short-circuit current density (Jsc) and fill factor (FF). This work demonstrates a good example for tuning absorption range, energy level, charge transport, and photovoltaic properties of the polymers by side-chain engineering and the solvent treatment can offer a simple and effective method to improve the efficiency of PSCs.
学科主题	有机光电
原文出处	SCI收录
公开日期	2013-12-16
内容类型	期刊论文
源URL	[http://ir.nimte.ac.cn/handle/174433/9974]
专题	宁波材料技术与工程研究所_宁波所知识产出
推荐引用方式 GB/T 7714	Ge ZY,Yang Wang,†,‡ Ying Liu,† Shaojie Chen,† Ruixiang Peng,† and Ziyi Ge*,†. Significant Enhancement of Polymer Solar Cell Performance via Side-Chain Engineering and Simple Solvent Treatment[J]. Chemistry of Materials,2013,3(15):3196—3204.
APA	Ge ZY,&Yang Wang,†,‡ Ying Liu,† Shaojie Chen,† Ruixiang Peng,† and Ziyi Ge*,†.(2013).Significant Enhancement of Polymer Solar Cell Performance via Side-Chain Engineering and Simple Solvent Treatment.Chemistry of Materials,3(15),3196—3204.
MLA	Ge ZY,et al."Significant Enhancement of Polymer Solar Cell Performance via Side-Chain Engineering and Simple Solvent Treatment".Chemistry of Materials 3.15(2013):3196—3204.

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