Violation of Quasineutrality in Semiconductor Transport: The Dember Effect

Details Violation of Quasineutrality in Semiconductor Transport: The Dember Effect Violation of Quasineutrality in Semiconductor Transport: The Dember Effect

2001-07-06

arxiv.org/abs/cond-mat/0107152v1

Physics

Condensed Matter

Scientific paper

Exact solution of the linearized equations for steady-state transport in semiconductors yields two modes that vary exponentially in space, one involving screening (without entropy production) and one involving diffusion and recombination (with entropy production). Neither mode is quasineutral. For constant surface photoexcitation with generation of electrons and holes, the steady-state response is a linear combination of these modes, subject to global electroneutrality. The resultant charge separation produces a voltage difference across the sample (the Dember effect).

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