Synthesis, characterization, and photovoltaic property of a low band gap polymer alternating dithienopyrrole and thienopyrroledione units

被引：33

作者：

Hu, Xiaolian ^{[1
]}

Shi, Minmin ^{[1
]}

Zuo, Lijian ^{[1
]}

Nan, Yaxiong ^{[1
]}

Liu, Yujing ^{[1
]}

Fu, Lei ^{[1
]}

Chen, Hongzheng ^{[1
]}

机构：

[1] Zhejiang Univ, MOE Key Lab Macromol Synth & Functionalizat, State Key Lab Silicon Mat, Dept Polymer Sci & Engn, Hangzhou 310027, Peoples R China

来源：

POLYMER | 2011年 / 52卷 / 12期

基金：

中国国家自然科学基金; 新加坡国家研究基金会;

关键词：

Polymer solar cells; Dithienopyrrole; Thienopyrroledione; SOLAR-CELLS; EFFICIENCY; COPOLYMERS;

D O I：

10.1016/j.polymer.2011.03.057

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

The lower the highest occupied molecular orbital (HOMO) energy level of the conjugated polymer is, the higher the open-circuit voltage (V-OC) of the obtained polymer solar cell (PSC) is. To achieve this goal, a new conjugated polymer (PDTPTPD) alternating dithienopyrrole (DTP) and thienopyrroledione (TPD) units was designed and synthesized by Stille coupling reaction. Through UV-vis absorption and cyclic voltammetry (CV) measurements, it was found that the resulting copolymer exhibited both a low optical band gap of 1.62 eV and a low HOMO energy level of -5.09 eV owing to the electronegativity of TPD moiety. Preliminary photovoltaic study disclosed that the PSC based on PDTPTPD:PCBM ([6,6]-phenyl-C-61 butyric acid methyl ester) blend showed a power conversion efficiency (PCE) of 1.9%, with a V-OC of 0.70 V. and a short circuit current (I-SC) of 6.97 mA/cm(2), suggesting that PDTPTPD is a promising photovoltaic polymer. (C) 2011 Elsevier Ltd. All rights reserved.

引用

页码：2559 / 2564

页数：6

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