期刊
JOURNAL OF APPLIED SPECTROSCOPY
卷 78, 期 2, 页码 223-227出版社
SPRINGER
DOI: 10.1007/s10812-011-9450-9
关键词
amorphous semiconductors; electron density of state distribution; Kubo-Greenwood formula; Davis-Mott approximation; types of electronic optical transitions; absorption spectrum; Urbach energy
类别
Formulas are derived for the Urbach energy as a function of the parameters controlling the slope of the exponential tails in the valence and conduction bands of amorphous semiconductors. It is shown that the Urbach energy remains constant, even if one of these parameters varies over a wide range.
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