期刊
SOLAR ENERGY MATERIALS AND SOLAR CELLS
卷 93, 期 8, 页码 1290-1295出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.solmat.2009.01.022
关键词
CIGS; Defects; Capacitance; Device modelling
Many electrical characteristics of Cu(In,Ga)Se(2)-based solar cells, including current-voltage characteristics, are affected by specific properties of negative-U defects in the absorber. We present these characteristics and discuss them in the framework of a V(Se)-V(Cu) defect model proposed by Lany and Zunger. We show how these defects influence photocarrier transport and the dominant recombination mechanism, and hence also the photovoltaic parameters of the cells. Numerical simulations validating our approach will also be presented. (C) 2009 Elsevier B.V. All rights reserved.
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