Nondestructive local analysis of current-voltage characteristics of solar cells by lock-in thermography

[摘要]：

By evaluating dark lock-in thermography images taken at one reverse and three forward biases, images of all two-diode-parameters J(01), J(02), n (ideality factor of J(02)), and G(p). (the parallel Ohmic conductivity) of the dark current voltage characteristic are obtained. A local series resistance is explicitly considered and may be provided as a series resistance image, e.g. resulting from luminescence imaging. The results enable a separate investigation of factors influencing the depletion region recombination current and the diffusion current, which is governed by the bulk lifetime. Local I V characteristics of special sites may be simulated. (C) 2011 Elsevier B.V. All rights reserved.

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