title: Successive large perturbation method for the elimination of initial value dependence in I-V curve fitting.
abstract: 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 I(0) 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.
authors: National Institute for Materials Science, Tsukuba, Ibaraki 305-0047, Japan.
authors: Jinhua
authors: J
authors: Cai
authors: Norifusa
authors: N
authors: Satoh
authors: Masatoshi
authors: M
authors: Yanagida
authors: Liyuan
authors: L
authors: Han