Kubo-greenwood Formula For The Exponential Absorption Region Of Amorphous Semiconductors And Distribution Of The Density Of Electronic States In The Tail Of The Conduction Band

• Published in: Journal of Applied Science and Engineering Vol. 26; no. 8; pp. 1167 - 1171
• Main Authors: R.G. Ikramov, M.A. Nuriddinova, Kh. A. Muminov, O.T. HolmirzaeV, B.Q. Sultonov
• Format: Journal Article
• Language: English
• Published: 淡江大學 01.01.2023; Tamkang University Press
• Subjects: distribution of the density of electronic states; exponential region of absorption spectra; partial absorption spectra; tail of the conduction band; partial absorption spectra; tail of the conduction band; exponential region of absorption spectra; distribution of the density of electronic states
• ISSN: 2708-9967; 2708-9975
• DOI: 10.6180/jase.202308_26(8).0012

The region of exponential absorption of the spectra of amorphous semiconductors is theoretically investigated using the Davis-Mott approximation method from the Kubo-Greenwood formula. Analytical expressions for the partial absorption spectra for the exponential region are derived from two different types of the Kubo- Greenwood formula. A new method is presented for calculating the distribution density of electronic states in the tails of the conduction band of amorphous semiconductors based on the analytical expression for experimental exponential absorption spectra. The density of electronic states in the tail of the conduction band of an amorphous solid selenium-sulfur alloy is determined from the experimental exponential absorption spectrum of this material.