Abstract
Experimental results are presented for the decay of photoconductivity in amorphous As2Se3 following single-pulse, repetitive-pulse and steady-state illumination, at various temperatures. The observed decays are compared with calculations using a discretized density of band-tail states decaying exponentially into the band gap. The connection between the decays after repetitive-pulse and steady-state illumination is described. It is shown that agreement between calculation and experiment requires a band tail which extends deep into the band gap, and that the presence of a deep band tail can be inferred from measurements made on relatively short time scales.
| Original language | English |
|---|---|
| Pages (from-to) | 635-647 |
| Number of pages | 13 |
| Journal | Philosophical Magazine B: Physics of Condensed Matter; Statistical Mechanics, Electronic, Optical and Magnetic Properties |
| Volume | 57 |
| Issue number | 5 |
| DOIs | |
| Publication status | Published - May 1988 |
Funding
This work was supported by the Science and Engineering Research Council. D. W. is grateful to the Science and Engineering Research Council for the provision of a research studentship and would like to thank Dr E. Vateva, Professor K. Shimakawa and Professor J. M. Marshall for helpful discussions. We would like to thank Dr Terry Clapp of STL for performing the infrared transmission measurements for us and for giving us the benefit of his experience in their interpretation.
ASJC Scopus subject areas
- General Chemical Engineering
- General Physics and Astronomy