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A General Analysis of Steady State Photocarrier Grating Technique for the Determination of Ambipolar Diffusion Length
Published online by Cambridge University Press: 25 February 2011
Abstract
A general photoconductivity formula is derived for the case of a semiconductor steady state photocarrier grating (SSPG)1. It is shown that, under the condition of weak applied electric field, the ambipolar diffusion length can be determined by the SSPG technique1without the lifetime-regime restriction2,3 if the lifetime of photocarriers is known. The general formula presented here is reduced to the simple lifetime-regime formula1–3 under the condition of fast dielectric relaxation.
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