Enhanced dissociation of charge-transfer states in narrow band gap polymer:fullerene solar cells processed with 1,8-octanedithiol

被引：30

作者：

Moet, D. J. D. ^{[1
]}

Lenes, M. ^{[1
]}

Morana, M. ^{[2
]}

Azimi, H. ^{[2
]}

Brabec, C. J. ^{[3
]}

Blom, P. W. M. ^{[1
,4
]}

机构：

[1] Univ Groningen, Zernike Inst Adv Mat, NL-9747 AG Groningen, Netherlands

[2] Konarka Austria, A-4040 Linz, Austria

[3] Univ Erlangen Nurnberg, i MEET, D-91058 Erlangen, Germany

[4] Holst Ctr, NL-5605 KN Eindhoven, Netherlands

来源：

APPLIED PHYSICS LETTERS | 2010年 / 96卷 / 21期

关键词：

charge exchange; conducting polymers; dissociation; fullerenes; photoconductivity; solar cells; RECOMBINATION;

D O I：

10.1063/1.3435468

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The improved photovoltaic performance of narrow band gap polymer:fullerene solar cells processed from solutions containing small amounts of 1,8-octanedithiol is analyzed by modeling of the experimental photocurrent. In contrast to devices that are spin coated from pristine chlorobenzene, these cells do not produce a recombination-limited photocurrent. Modeling of the experimental data reveals that a sixfold reduction in the decay rate of photogenerated bound electron-hole pairs can account for the marked increase in short-circuit current density and fill factor. At short-circuit conditions, the dissociation probability of bound pairs is found to increase from 48% to 70%.

引用

页数：3

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