Current transients in planar optoelectronic devices are of great importance to both the scientific and industrial communities. The authors offer a simple, general theory to describe these transients, with specific examples for an important class of solar cells. Their analysis reveals that the apparent free-carrier concentration obtained via the usual integral approach is altered by a nontrivial factor of two, which could lead to misinterpretations of the charge densities and overall device physics. This fresh perspective could have far-reaching effects on semiconductor research and technology.
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Hawks et al. (2015) studied this question.
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