Optical bleaching of metastable defects in amorphous silicon
- 17 February 1992
- journal article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 60 (7), 874-876
- https://doi.org/10.1063/1.107435
Abstract
Sub-band-gap absorption due to metastable defects induced by intense visible illumination in hydrogenated amorphous silicon is bleached when treated with low intensity, intensely absorbed, ultraviolet light. The bleaching effect is shown to occur in the bulk and is nonthermal. It is proposed that the energy from the surface absorbed light can be transferred to the bulk through phonons generated by cooling of photo injected hot carriers.Keywords
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