Morphology evolution by controlling solvent-solute interactions using a binary solvent in bulk heterojunction solar cells

被引：11
|
作者：
Cho, Namchul [1 ]
Yip, Hin-Lap [1 ]
Jen, Alex K. -Y. [1 ]
机构：
[1] Univ Washington, Dept Mat Sci & Engn, Seattle, WA 98195 USA
来源：
APPLIED PHYSICS LETTERS | 2013年 / 102卷 / 23期
基金：
美国国家科学基金会;
关键词：
CONJUGATED POLYMERS; CHARGE-TRANSPORT; ORGANIZATION; PERFORMANCE;
D O I：
10.1063/1.4811173
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
Improved power conversion efficiency of poly(indacenodithiophene-co-phananthrene-quinoxaline) (PIDT-PhanQ)/[6,6]-phenyl-C71-butyric acid methyl ester (PC71BM) based bulk- heterojunction (BHJ) solar cells was achieved upon adding tetrahydrofuran (THF) as a co-solvent to 1,2-dichlorobenzene (DCB). This reasonably large enhancement is achieved due to THF changes the morphology in the active layer by reducing the solvent-solute interaction. The Flory-Huggins interaction parameter and cohesive energy densities for PIDT-PhanQ and PD71BM with different solvents were further studied to understand the underlying phase separation mechanism in BHJ films. (C) 2013 AIP Publishing LLC.
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页数：4
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