The role of solvent and morphology on miscibility of methanofullerene and poly(3-hexylthiophene)

被引：15

作者：

Gadisa, Abay ^{[1
]}

Tumbleston, John R. ^{[2
]}

Ko, Doo-Hyun ^{[1
]}

Aryal, Mukti ^{[2
]}

Lopez, Rene ^{[2
]}

Samulski, Edward T. ^{[1
]}

机构：

[1] Univ N Carolina, Dept Chem, Caudill & Kenan Labs, Chapel Hill, NC 27599 USA

[2] Univ N Carolina, Dept Phys & Astron, Chapel Hill, NC 27599 USA

来源：

THIN SOLID FILMS | 2012年 / 520卷 / 16期

基金：

美国国家科学基金会;

关键词：

P3HT/PCBM bilayer; Poly(3-hexylthiophene); Miscibility; Morphology; Photovoltaic; Interdiffusion; OPEN-CIRCUIT VOLTAGE; POLYMER PHOTOVOLTAIC CELLS; SOLAR-CELLS; PHOTOCURRENT GENERATION; CHARGE-TRANSPORT; PHASE-SEPARATION; PERFORMANCE; ORGANIZATION; FILMS;

D O I：

10.1016/j.tsf.2012.03.117

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A bicontinuous, percolating bulk heterojunction morphology is integral to organic polymer solar cells. Understanding the factors affecting the miscibility of photovoltaic polymers with a fullerene electron acceptor molecule is a key to controlling the morphology. Starting from discreet pure phases - a poly(3-hexylthiophene) (P3HT) and [6,6]-phenyl-C-61-butyric acid methyl ester (PCBM) bilayer film - the evolution of the P3HT-PCBM interface was studied with particular attention to the role of residual solvent in P3HT on PCBM interdiffusion. This investigation shows that in the bilayer geometry PCBM can rapidly diffuse into amorphous P3HT, but phase separation is maintained if the P3HT layer is cast from a very volatile solvent or if it is annealed prior to casting the PCBM overlayer to complete the bilayer geometry. Published by Elsevier B.V.

引用

页码：5466 / 5471

页数：6

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