Observation of metastable deep acceptor states in AgGaS{sub 2} from donor-acceptor pair-emission spectra
- Department of Physics, Chung-Ang University, Seoul (Korea)
- Department of Physics, University of California, Berkeley, California 94720 (United States)
We report the discovery of photoinduced quenching of donor-acceptor pair-emission peaks in AgGaS{sub 2} crystals at liquid-He temperatures. From previous high-pressure studies [Phys. Rev. B {bold 55}, 9642 (1997)] these peaks have been attributed to radiative recombination between shallow donors and {ital deep acceptors}. We explain our results by the optical capture of the deep neutral acceptors into optically inactive metastable states. At low temperatures the capture time is found to be {le}10{sup 2}s while the emission time is of the order of 10{sup 3}s. The thermal capture barrier height of the metastable states is determined to be about 2 meV. {copyright} {ital 1997} {ital The American Physical Society}
- Research Organization:
- Lawrence Berkeley National Laboratory
- DOE Contract Number:
- AC03-76SF00098
- OSTI ID:
- 538554
- Journal Information:
- Physical Review, B: Condensed Matter, Journal Name: Physical Review, B: Condensed Matter Journal Issue: 8 Vol. 56; ISSN 0163-1829; ISSN PRBMDO
- Country of Publication:
- United States
- Language:
- English
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