Metastable States in Semi-Insulating GaAs Revealed by Thermally Stimulated Current Spectroscopy
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Thermally stimulated current spectroscopy (TSC) with near band-edge and infrared (IR) light excitation, in conjunction with photocurrent responses at low temperatures, has proved to be a very useful technique for investigating the quenching and recovery of EL2. During the IR quenching process, changes in trap species and carrier lifetime are correlated with the normal and metastable state of EL2. The traps observed in TSC spectra before and after IR quenching are believed to be due to point defects their complexes, especially complexes involving AaGA1 and show a very clear stoichiometry dependence.
& Look, D. C.
(1992). Metastable States in Semi-Insulating GaAs Revealed by Thermally Stimulated Current Spectroscopy. Proceedings of the 16th International Conference on Defects in Semiconductors, 83-87, 991-996.