Halogen-free solvent processing for sustainable development of high efficiency organic solar cells

被引：83

作者：

Chen, Kung-Shih ^{[1
]}

Yip, Hin-Lap ^{[1
]}

Schlenker, Cody W. ^{[2
]}

Ginger, David S. ^{[2
]}

Jen, Alex K-Y ^{[1
]}

机构：

[1] Univ Washington, Dept Mat Sci & Engn, Seattle, WA 98195 USA

[2] Univ Washington, Dept Chem, Seattle, WA 98195 USA

来源：

ORGANIC ELECTRONICS | 2012年 / 13卷 / 12期

基金：

新加坡国家研究基金会; 美国国家科学基金会;

关键词：

Additive; Bulk-heterojunction; Non-halogenated solvent; Phase-separation; EXCITON DIFFUSION LENGTH; OPEN-CIRCUIT VOLTAGE; OPTICAL INTERFERENCE; CONJUGATED POLYMERS; PHASE-SEPARATION; MORPHOLOGY; PERFORMANCE; POLY(3-HEXYLTHIOPHENE); ENHANCEMENT; FULLERENES;

D O I：

10.1016/j.orgel.2012.08.026

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Eliminating processing with halogenated solvents is desirable to achieve sustainable large-scale fabrication of organic solar cells. This work demonstrates a device processing approach completely free of halogenated solvents to yield high-performance (power conversion efficiency, eta(P) > 6%) polymer: fullerene bulk-heterojunction solar cells comprising a conjugated polymer PIDT-phanQ and [6,6]-phenyl-C71-butyric acid methyl ester (PC71BM). Introducing 2% 1-methylnaphthalene (Me-naph) as a processing additive to toluene alleviates PC71BM solubility problems, reduces phase domain size by two orders of magnitude, and boosts efficiency from eta(P) = 0.02% to 6.10%. Both AFM and TEM imaging show that the Me-naph additive promotes a more finely phase-separated morphology in spin-coated films, while photoluminescence quenching and photoinduced absorption spectroscopy confirm that this finer morphology results in both better exciton quenching and more efficient charge separation. (C) 2012 Elsevier B.V. All rights reserved.

引用

页码：2870 / 2878

页数：9

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