A shallow state in molecular beam epitaxial grown CuGaSe2film detectable by 1.62 eV photoluminescence
作者:
Akimasa Yamada,
Paul Fons,
Shigeru Niki,
Hajime Shibata,
Akira Obara,
Yunosuke Makita,
Hiroyuki Oyanagi,
期刊:
Journal of Applied Physics
(AIP Available online 1997)
卷期:
Volume 81,
issue 6
页码: 2794-2798
ISSN:0021-8979
年代: 1997
DOI:10.1063/1.363936
出版商: AIP
数据来源: AIP
摘要:
Cu-rich CuGaSe2films grown on [001] oriented GaAs substrates by molecular beam epitaxy show a remarkable low temperature photoluminescence emission peaked at 1.620 eV. This emission can be attributed to a free-to-bound recombination accompanying a donor-to-acceptor pair recombination. The ionization energies of these states are found to be 3.4 and 108 meV, respectively, via temperature dependent photoluminescence. The 108 meV state is attributed to a donor and the 3.4 meV state to an acceptor state observed. ©1997 American Institute of Physics.
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