Effect of temperature on the morphological and photovoltaic stability of bulk heterojunction polymer: fullerene solar cells

被引：249

作者：

Bertho, Sabine ^{[1
]}

Janssen, Griet ^{[2
]}

Cleij, Thomas J. ^{[1
]}

Conings, Bert ^{[1
]}

Moons, Wouter ^{[1
]}

Gadisa, Abay ^{[3
]}

D'Haen, Jan ^{[1
]}

Goovaerts, Etienne ^{[2
]}

Lutsen, Laurence ^{[3
]}

Manca, Jean ^{[1
,3
]}

Vanderzande, Dirk ^{[1
,3
]}

机构：

[1] Hasselt Univ, Inst Mat Res, B-3590 Diepenbeek, Belgium

[2] Univ Antwerp, Dept Phys, B-2610 Antwerp, Belgium

[3] IMOMEC, IMEC VZW, B-3590 Diepenbeek, Belgium

来源：

SOLAR ENERGY MATERIALS AND SOLAR CELLS | 2008年 / 92卷 / 07期

关键词：

organic photovoltaics; thermal stability; glass transition temperature; morphology;

D O I：

10.1016/j.solmat.2008.01.006

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：

In high performance polymer: fullerene bulk heterojunction solar cells the nanoscale morphology of interpenetrating acceptor:donor materials is optimized through appropriate preparation conditions such as annealing and choice of solvent, but this initial state-of-the-art morphology will not remain stable during long-term operation. We report the effects of prolonged storage at elevated temperatures on both the morphology and the photovoltaic performance for the model systems MDMO-PPV:PCBM and P3HT:PCBM as compared to 'High T-g PPV':PCBM based solar cells, where the 'High Tg PPV' is characterized by its high glass transition temperature (138 degrees Q. In situ monitoring of the photocurrent-voltage characteristics at elevated temperatures, in combination with a systematic transmission electron microscopy (TEM) study and complementary optical spectroscopy, reveals distinct degradation kinetics and morphological changes that indicate the occurrence of different underlying physico-chemical mechanisms. (c) 2008 Elsevier B.V. All rights reserved.

引用

页码：753 / 760

页数：8

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