Imbalanced charge mobility in oxygen treated polythiophene/fullerene based bulk heterojunction solar cells

被引：43

作者：

Chellappan, Vijila ^{[1
]}

Ng, Ging Meng ^{[1
]}

Tan, Mein Jin ^{[1
]}

Goh, Wei-Peng ^{[1
]}

Zhu, Furong ^{[2
,3
]}

机构：

[1] ASTAR, Inst Mat Res & Engn, Singapore 117602, Singapore

[2] Hong Kong Baptist Univ, Dept Phys, Kowloon Tong, Hong Kong, Peoples R China

[3] Hong Kong Baptist Univ, Ctr Adv Luminescence Mat, Kowloon Tong, Hong Kong, Peoples R China

来源：

APPLIED PHYSICS LETTERS | 2009年 / 95卷 / 26期

关键词：

carrier mobility; conducting polymers; fullerene compounds; organic semiconductors; solar cells; EFFICIENCY; RECOMBINATION; TRANSPORT;

D O I：

10.1063/1.3279135

中图分类号：

O59 [应用物理学];

学科分类号：

070305 [高分子化学与物理];

摘要：

The effect of oxygen induced traps on charge mobility in bulk heterojunction solar cells using poly(3-hexylthiophene) (P3HT):l-(3-methoxycarbonyl)-propyl-l-phenyl-(6, 6) methanofullerene (PCBM) blend have been studied using photoinduced charge extraction by linearly increasing voltage (PhotoCELIV) technique. The solar cells exposed to oxygen exhibit dual PhotoCELIV peaks, whereas the solar cell without oxygen treatment show single PhotoCELIV peak with the charge mobility of the order of 10(-4) cm(2)/V s. It is demonstrated that the oxygen treatment imbalance the charge mobility in the P3HT/PCBM photoactive layer, which affects the power conversion efficiency and lifetime of the solar cell. The single PhotoCELIV peak for the device without oxygen treatment indicates that the charge mobility is balanced, that causes the overlapping of electron and hole transients.

引用

页数：3

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