Premium
On the theory of absorption and luminescence spectra in amorphous semiconductors
Author(s) -
Sprenger D.
Publication year - 1979
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.2220940230
Subject(s) - luminescence , spectral line , absorption spectroscopy , absorption (acoustics) , amorphous semiconductors , amorphous solid , semiconductor , attenuation coefficient , phonon , density of states , representation (politics) , electron , atomic electron transition , molecular physics , atomic physics , materials science , chemistry , physics , optics , condensed matter physics , optoelectronics , quantum mechanics , crystallography , politics , political science , law
Optical transitions in a system of randomly distributed localized electron states coupled to the phonon system are considered. A general expression for the spectral dependence of the absorption coefficient and the luminescence intensity is derived. This expression is applied to the uncorrelated case where the spectral dependences are determined by a density‐of‐states model. Various types of optical transitions within a density‐of‐states model are considered and the corresponding spectral dependences discussed. The derived spectral representation allows the direct calculation of the temperature dependent moments for the various bands.