Theory of Impedance Spectroscopy of Ambipolar Solar Cells with Trap-Mediated Recombination

被引：24

作者：

Bertoluzzi, Luca ^{[1
]}

Boix, Pablo P. ^{[2
]}

Mora-Sero, Ivan ^{[1
]}

Bisquert, Juan ^{[1
]}

机构：

[1] Univ Jaume 1, Dept Fis, Photovolta & Optoelect Devices Grp, Castellon de La Plana 12071, Spain

[2] Energy Res Inst NTU ERI N, Singapore 637553, Singapore

来源：

JOURNAL OF PHYSICAL CHEMISTRY C | 2014年 / 118卷 / 30期

关键词：

EQUIVALENT-CIRCUIT; ELECTRONS; HOLES;

D O I：

10.1021/jp411004e

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The analysis of recombination in solar cells suggests in many cases the presence of trap-mediated recombination in the absorber. We present a theory of the recombination of electrons and holes, the Shockley-Read-Hall model, using the impedance spectroscopy technique. We derive the impedance functions and the corresponding equivalent circuit model. After examining some cases of interest, we show that two semicircles can be obtained in the recombination circuit only if the chemical capacitance associated with traps is substantially larger than the chemical capacitances of free electrons and holes in the absorber bands, while in the other cases the normal behavior of one recombination arc will be obtained.

引用

页码：16574 / 16580

页数：7

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