Disorder and optical absorption in amorphous silicon and amorphous germanium

The role that disorder plays in shaping the functional form of the optical absorption spectra of both amorphous silicon and amorphous germanium is investigated. Disorder leads to a redistribution of states, which both reduces the empirical optical energy gap and broadens the optical absorption tail....

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Bibliographic Details
Published in:Journal of non-crystalline solids 1997-03, Vol.210 (2), p.249-253
Main Authors: O'Leary, Stephen K., Zukotynski, Stefan, Perz, John M.
Format: Article
Language:English
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Summary:The role that disorder plays in shaping the functional form of the optical absorption spectra of both amorphous silicon and amorphous germanium is investigated. Disorder leads to a redistribution of states, which both reduces the empirical optical energy gap and broadens the optical absorption tail. The relationship between the optical gap and the breadth of the absorption tail observed in amorphous semiconductors is thus explained.
ISSN:0022-3093
1873-4812
DOI:10.1016/S0022-3093(96)00612-6