Imbalanced mobilities causing S-shaped IV curves in planar heterojunction organic solar cells

被引：199

作者：

Tress, Wolfgang ^{[1
]}

Petrich, Annette ^{[1
]}

Hummert, Markus ^{[1
]}

Hein, Moritz ^{[1
]}

Leo, Karl ^{[1
]}

Riede, Moritz ^{[1
]}

机构：

[1] Tech Univ Dresden, Inst Angew Photophys, D-01069 Dresden, Germany

来源：

APPLIED PHYSICS LETTERS | 2011年 / 98卷 / 06期

关键词：

D O I：

10.1063/1.3553764

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We show that S-kinks in the current voltage characteristics, which decrease the fill factor significantly, can be caused by a strong imbalance of charge carrier mobilities (hole mobility in donor and electron mobility in acceptor) in planar/flat heterojunction organic solar cells. Electrical simulations according to a drift-diffusion model predict the occurrence of an S-kink for a mobility mismatch factor larger than 100. By combining a low-mobility donor material, (1,2,3,4,9,10,11,12-octaphenyl-diindeno[1,2,3-cd: 1',2',3'-lm]perylene), with the acceptors C(60) and N, N'-dimethylperylene-3,4: 9,10-dicarboximide, which show different electron mobilities, we experimentally verify the predictions. Our results demonstrate that not only interface effects but also the photoactive material itself can cause S-kinks. (C) 2011 American Institute of Physics. [doi:10.1063/1.3553764]

引用

页数：3

共 12 条

[1] Polymer-Electrode Interfacial Effect on Photovoltaic Performances in Poly(3-hexylthiophene):Phenyl-C61-butyric Acid Methyl Ester Based Solar Cells [J].