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Anomalous photovoltaic effect in ferroelectrics

1978; Lebedev Physical Institute; Volume: 21; Issue: 12 Linguagem: Inglês

10.1070/pu1978v021n12abeh005722

2169-5296

V. M. Fridkin, Branko N. Popov,

Engineering Diagnostics and Reliability

It is well known that the photovoltage in semiconductors, whatever its nature, cannot exceed the energy gap, which is several volts. For instance, in a homogeneous semiconductor the Dember (diffusion) photovoltage does not exceed the following value [3.6] for an infinitely large intensity of the exciting light: $$ V = \frac{{kT}}{q}\ell n\frac{{{n_1}}}{{{n_0}}} < < \frac{{kT}}{q}\ell n\frac{{{N_c}}}{{{n_0}}} = {E_g}.$$ (6.1)