Diffusion Lengths of Excitons in Polymers in Relation to External Quantum Efficiency of the Photocurrent of Solar Cells

被引：17

作者：

Leow, Cheahli ^{[1
]}

Ohnishi, Toshihiro ^{[1
,2
]}

Matsumura, Michio ^{[1
]}

机构：

[1] Osaka Univ, Res Ctr Solar Energy Chem, Toyonaka, Osaka 5608531, Japan

[2] Sumitomo Chem Co Ltd, Chuo Ku, Osaka 5418550, Japan

来源：

JOURNAL OF PHYSICAL CHEMISTRY C | 2014年 / 118卷 / 01期

关键词：

POLY(3-HEXYLTHIOPHENE); GENERATION; DYNAMICS; FILMS;

D O I：

10.1021/jp4079376

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

By measuring quenching of fluorescence from polymers by C-60 at a planar C-60/polymer junction as a function of thickness of the polymer layers, we determined diffusion lengths of excitons for four kinds of polymers. The exciton diffusion lengths ranged from 5 to 12 nm depending on the polymer. We also fabricated solar cells with a bilayer C-60/polymer junction using the polymers. The external quantum efficiency of short-circuit photocurrents was reproduced well using the exciton diffusion lengths, indicating the usefulness of the analytical method. The results also suggest low carrier recombination efficiency at the C-60/polymer interface.

引用

页码：71 / 76

页数：6

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