Bulk heterojunction solar cells with thick active layers and high fill factors enabled by a bithiophene-co-thiazolothiazole push-pull copolymer

被引:152
作者
Peet, J. [1 ]
Wen, L. [1 ]
Byrne, P. [1 ]
Rodman, S. [1 ]
Forberich, K. [1 ]
Shao, Y. [1 ]
Drolet, N. [1 ]
Gaudiana, R. [1 ]
Dennler, G. [1 ]
Waller, D. [1 ]
机构
[1] Konarka Technol, Lowell, MA 01852 USA
关键词
SEMICONDUCTING POLYMERS; THIOPHENE COPOLYMERS; ATOM;
D O I
10.1063/1.3544940
中图分类号
O59 [应用物理学];
学科分类号
摘要
A push-pull copolymer is presented which can be used in bulk heterojunction (BHJ) solar cells with active layers greater than 200 nm and fill factors above 60%. The efficiencies of most BHJ solar cells are limited by the fact that they have active layers which are between 60 and 110 nm. While this thickness regime enables peak quantum efficiencies (EQE) of 60%-70%, the ability to fabricate thicker devices would increase average EQE values and thus device efficiencies. Discovery of materials which can maintain high performance at large thicknesses will enable higher performance in BHJ hero cells and increase the commercial viability of this technology. (C) 2011 American Institute of Physics. [doi: 10.1063/1.3544940]
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页数:3
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