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Successive large perturbation method for the elimination of initial value dependence in I-V curve fitting

Rev. Sci. Instrum. 80, 115111 (2009); doi:10.1063/1.3264083

Published 20 November 2009

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Jinhua Cai,1,2 Norifusa Satoh,1 Masatoshi Yanagida,1 and Liyuan Han1
1National Institute for Materials Science, Tsukuba, Ibaraki 305-0047, Japan
2Department of Physics, Shanghai Jiaotong University, Shanghai 200240, People's Republic of China
A successive large perturbation method (SLPM) is proposed to resolve the problem of initial value dependence in the numerical least-square fitting for the extraction of I-V parameters in solar cells. In this method a large perturbation is applied onto certain a parameter before next turn of Newton-like iteration is proceeded and an improved result is usually obtained if the I-V parameters suffer from a latent initial value dependence problem. The numerical insensitivity of mean square of deviation to the variation of large shunt resistance is a critical factor to cause the initial value dependence. An application example for a dye-sensitized solar cell shows that about a 60% change of reverse saturation current I0 occurs after SLPM is applied to the result obtained by Newton-like method. Our result demonstrates that SLPM is a powerful tool to eliminate the initial value dependence in I-V curve fitting. ©2009 American Institute of Physics
History: Received 1 October 2009; accepted 26 October 2009; published 20 November 2009
Permalink: http://link.aip.org/link/?RSINAK/80/115111/1
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KEYWORDS and PACS

Keywords
PACS
  • 88.40.H-
    Solar cells (photovoltaics)
  • YEAR: 2010

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ISSN:
0034-6748 (print)   1089-7623 (online)
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