Thiadiazole quinoxaline-based copolymers with ∼1.0 eV bandgap for ternary polymer solar cells

被引：18

作者：

Yu, Jiangsheng ^{[1
]}

An, Qiaoshi ^{[2
]}

Hai, Jiefeng ^{[1
]}

Nie, Xuemei ^{[1
]}

Zhou, Baojing ^{[1
]}

Zhang, Fujun ^{[2
]}

Tang, Weihua ^{[1
]}

机构：

[1] Nanjing Univ Sci & Technol, Minist Educ, Key Lab Soft Chem & Funct Mat, Nanjing, Jiangsu, Peoples R China

[2] Beijing Jiaotong Univ, Minist Educ, Key Lab Luminescence & Opt Informat, Beijing 100044, Peoples R China

来源：

POLYMER | 2015年 / 79卷

基金：

中国国家自然科学基金;

关键词：

Thiadiazole quinoxaline-based copolymers; Ultra low bandgaps; Ternary polymer solar cells; OPEN-CIRCUIT VOLTAGE; CONJUGATED POLYMERS; SINGLE-JUNCTION; TANDEM POLYMER; EFFICIENT; PERFORMANCE; DESIGN; THIADIAZOLOQUINOXALINE; SENSITIZATION; DERIVATIVES;

D O I：

10.1016/j.polymer.2015.09.047

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

A new strong electron-deficient acceptor unit, 4,9-bis(5-bromothiophen-2-yl)-6,7-bis(5-dodecylthiophen-2-yl)-[1,2,5]thiadiazolo[3,4-g]quinoxaline (TQxT), is designed. Three TQxT based new conjugated polymers have been further developed by alternating with benzo[1,2-b:4,5-b']dithiophene or naphtho[1,2-b:5,6-b']difuran. Featuring ultra low bandgaps of 1.03-1.10 eV, these polymers exhibit absorption spectra beyond near-infrared (NIR) region. The polymer: PC71BM (1:2) solar cells deliver a best power conversion efficiency (PCE) of 0.43%. The doping of 9 wt% PBDTT-TQxP into P3HT:PC71BM (1:2) blend, however, leads to a highest PCE of 3.58% for the resultant ternary solar cells, corresponding to similar to 22% improvement in comparison to 2.93% PCE for P3HT:PC71BM binary cells. (C) 2015 Elsevier Ltd. All rights reserved.

引用

页码：12 / 20

页数：9

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