Fused thiophene/quinoxaline low band gap polymers for photovoltaic's with increased photochemical stability

被引：22

作者：

Carle, Jon E. ^{[1
]}

Jorgensen, Mikkel ^{[1
]}

Manceau, Matthieu ^{[1
]}

Helgesen, Martin ^{[1
]}

Hagemann, Ole ^{[1
]}

Sondergaard, Roar ^{[1
]}

Krebs, Frederik C. ^{[1
]}

机构：

[1] Tech Univ Denmark, Riso Natl Lab Sustainable Energy, DK-4000 Roskilde, Denmark

来源：

SOLAR ENERGY MATERIALS AND SOLAR CELLS | 2011年 / 95卷 / 12期

关键词：

Polymer photovoltaic; Low band gap; Quinoxaline; Fused thiophene; Photochemical stability; SOLAR-CELLS;

D O I：

10.1016/j.solmat.2011.07.016

中图分类号：

TE [石油、天然气工业]; TK [能源与动力工程];

学科分类号：

0807 ; 0820 ;

摘要：

We investigate a family of low band-gap polymers based on the common acceptor moiety 2,3-bis-(3-octyloxyphenyl)quinoxaline (Q) combined with thiophene (T) or the fused thiophene systems: benzo[2,1-b:3,4-b']-dithioPhene (BDT) or dithieno[3,2-b,2',3'-d]-thiophene (OTT). The photochemical stability of the three polymers was examined and compared to P3HT. They were found to be substantially more robust than P3HT with a ranking of DrfQ > BDTQ > TQ1 >> P3HT, indicating that the fused ring systems of OTT and BDT impart a large degree of photochemical stability than thiophene. Furthermore devices with normal and inverted geometry were prepared and tested in air. The normal geometry devices showed the highest efficiencies compared to the inverted, in particular owing to a higher V(oc), with TQl being the most efficient with a power conversion efficiency (PCE) of 1.5% (1000W m(-2) AM 1.5 G). For the inverted devices TQ1 and DTTQ showed the best PCEs of 0.9%. (C) 2011 Elsevier B.V. All rights reserved.

引用

页码：3222 / 3226

页数：5

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