Electrical properties of the interfaces in bulk heterojunction organic solar cells investigated by electrochemical impedance spectroscopy

被引：80

作者：

Zhang, Yang ^{[1
]}

Li, Liru

Yuan, Shanshan

Li, Guoqiang

Zhang, Weifeng

机构：

[1] Henan Univ, Key Lab Photovolta Mat, Inst Phys Microsyst, Kaifeng 475004, Henan, Peoples R China

来源：

ELECTROCHIMICA ACTA | 2013年 / 109卷

关键词：

Organic solar cells; Electrochemical impedance spectroscopy; Interfacial capacitance; Slow drying; POLYMER; PERFORMANCE; POLY(3-HEXYLTHIOPHENE); MORPHOLOGY; FULLERENE; DIFFUSION; TRANSPORT; SOLVENT; VOLTAGE; CPE;

D O I：

10.1016/j.electacta.2013.07.152

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Organic photovoltaic cells based on P3HT:PCBM bulk heterojunctions were fabricated with different drying durations of 0, 30, 60, and 80 min before annealing. The 60 min drying of the active layer was optimal to form perfect P3HT crystals, and to achieve the power conversion efficiency of 3.97%, increased by 10.3% compared with the device without drying. AC impedance analysis indicated the 60 min drying of the active layer formed the electrically perfect interface between P3HT and PCBM for efficient charge transport and dissociation of excitons. (C) 2013 Elsevier Ltd. All rights reserved.

引用

页码：221 / 225

页数：5

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