Impedance spectroscopy investigation of electron transport in solar cells based on blend film of polymer and nanocrystals

被引：33

作者：

Huang, Wenbo ^{[1
]}

Peng, Junbiao ^{[1
]}

Wang, Li ^{[1
]}

Wang, Jian ^{[1
]}

Cao, Yong ^{[1
]}

机构：

[1] S China Univ Technol, Inst Polymer Optoelect Mat & Devices, Key Lab Special Funct Mat, Guangzhou 510640, Peoples R China

来源：

APPLIED PHYSICS LETTERS | 2008年 / 92卷 / 01期

基金：

中国国家自然科学基金;

关键词：

D O I：

10.1063/1.2831661

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Bulk heterojunction solar cells, consisting of the active film of poly[2-methoxy,5-(2-ethylhexoxy)-1,4-phenylene vinylene] (MEH-PPV) doped with cadmium selenium (CdSe) nanoparticles, were fabricated and investigated using impedance spectroscopy (IS) technique. The spectroscopy displayed a phenomenon of negative imaginary impedance (NII) related to the inductive effect in low frequencies in the device with low CdSe concentrations, and the NII phenomenon may disappear with increasing the CdSe concentrations. We propose an equivalent circuit to explain the IS and deduce that the NII phenomenon is related to inadequate channels for electron transport in the blend film of CdSe nanocrystals and MEH-PPV. The method based on the IS is available to probe the formation of a continuous network for electron transport in the nanocrystal dispersed polymer system. (c) 2008 American Institute of Physics.

引用

页数：3

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