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Simple measurement of 300 K electron capture cross section for EL2 in GaAs

Journal of Applied Physics, ISSN: 0021-8979, Vol: 80, Issue: 6, Page: 3590-3591
1996
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Article Description

A simple experiment involving only the measurement of dark current I and 1.1 μm photocurrent I in semi-insulating (SI) GaAs allows an accurate determination of the electron capture cross section σ for the important defect EL2 in GaAs. For 45 SI GaAs samples, from 12 different boules, grown by three different techniques, we find that I/I=1.96±0.05 at 300 K. This relationship gives σ=1.4±0.4×10 cm, which is compared to previously estimated values. © 1996 American Institute of Physics.

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