Journal
REVIEW OF SCIENTIFIC INSTRUMENTS
Volume 80, Issue 11, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.3264083
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Funding
- Chinese National Science Foundation [10374066]
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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 l-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 to 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. (C) 2009 American Institute of Physics. [doi:10.1063/1.3264083]
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