Spectral Response of Photoconductivity in CuAl1-xGaxS2
- 1 August 1988
- journal article
- Published by IOP Publishing in Japanese Journal of Applied Physics
- Vol. 27 (8R)
- https://doi.org/10.1143/jjap.27.1422
Abstract
The excitation spectra of photoconductivity are studied at room temperature on p-type CuAl1-x Ga x S2 crystals. The effect of polarized light excitation reveals that the structure in the intrinsic range is attributable to band-to-band transitions, corresponding to the direct transitions from two valence subbands split off by a crystal field. In the extrinsic range, two major photo excitations are found to be due to a free to shallow donor transition and a deep donor transition. Photocarrier generation via the shallow donor states assisted by thermal activation plays an important role in these samples.Keywords
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