Thermally stimulated luminescence from x-irradiated porous silicon
作者:
D. W. Cooke,
B. L. Bennett,
E. H. Farnum,
W. L. Hults,
R. E. Muenchausen,
J. L. Smith,
期刊:
Applied Physics Letters
(AIP Available online 1997)
卷期:
Volume 70,
issue 26
页码: 3594-3596
ISSN:0003-6951
年代: 1997
DOI:10.1063/1.119243
出版商: AIP
数据来源: AIP
摘要:
We have measured thermally stimulated luminescence from light-emitting porous silicon that has been x irradiated at room temperature and heated to 400 °C. The glow curve exhibits peaks at 103, 155, 219, and 271 °C, with additional maxima occurring above 400 °C. Each of the peaks emits similar emission spectra characterized by a band with a maximum near 720 nm and 0.39 eV full width at half-maximum. Following x irradiation at room temperature, the sample exhibits well-known photoluminescence, but after heating to 400 °C, the loss of hydrogen renders the sample nonphotoluminescent. However, thermally stimulated luminescence can be repeatedly induced. Observation of thermally stimulated luminescence is unambiguous evidence for the existence of an insulating surface layer on porous silicon. ©1997 American Institute of Physics.
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