Spectral Variation of Amorphous As_2S_3 after the Initial Annealing and Photodarkening

概要

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The initial annealing at low temperature, e.g. 443 K and 373 K, increased slightlythe absorption around the top of the fundamental absorption band at - 6 eV, whileat high temperature, e.g. 463 K, increased largely the absorption near the top. Thelight illumination in the edge of the band at 90 K increased the absorption around thetail ( - 3 eV) of the band, while depressed that around the top. This light illuminationbrought the identical absorption shape independent of the initial annealing temperalure. Once the light illumination was made, spectral variations under repetitions offurther thermal annealing at 463 K and light illumination at 90 K were reversiblyreproduced in several times. It was made clear that the thermal annealing and thelight illumination caused not only the edge shift, but total change of absorption bandshape which arose from heavy distortion of the layer structure of films.
社団法人日本物理学会の論文
1990-12-15