Bipolar charge transport in poly(3-hexyl thiophene)/methanofullerene blends: A ratio dependent study

被引：67

作者：

Baumann, A. ^{[1
]}

Lorrmann, J. ^{[1
]}

Deibel, C. ^{[1
]}

Dyakonov, V. ^{[1
,2
]}

机构：

[1] Univ Wurzburg, D-97074 Wurzburg, Germany

[2] Bavarian Ctr Appl Energy Res eV ZAE Bayern, D-97074 Wurzburg, Germany

来源：

APPLIED PHYSICS LETTERS | 2008年 / 93卷 / 25期

关键词：

electron mobility; hole mobility; impurity states; organic semiconductors; photoconductivity; polymer blends; solar cells; time resolved spectra;

D O I：

10.1063/1.3055608

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We investigated the charge carrier mobility in pristine poly(3-hexyl thiophene-2,5-diyl) (P3HT):[6,6]-phenyl-C(61) butyric acid methyl ester (PCBM) blend devices by applying the time resolved photoconductivity experiment in dependence on the donor:acceptor ratio. We observe a bipolar transport in all studied samples ranging from pure polymer to polymer:fullerene with 90% PCBM content. For the ratios P3HT:PCBM 1:4 and 1:1 we observe two transit times in the electron current transients as well as hole double transients for P3HT:PCBM 1:2. We find high hole and electron mobilities in the order of 10(-3)-10(-2) cm(2)/V s for a concentration of 90% PCBM in the blend.

引用

页数：3

共 12 条

[1] NONDISPERSIVE-TO-DISPERSIVE CHARGE-TRANSPORT TRANSITION IN DISORDERED MOLECULAR-SOLIDS [J].