Semiclassical density-of-states and optical-absorption analysis of amorphous semiconductors

Autor:	Stefan Zukotynski, J. M. Perz, Stephen K. O’Leary
Rok vydání:	1995
Předmět:	Amorphous silicon Amorphous semiconductors Formalism (philosophy of mathematics) chemistry.chemical_compound Materials science Condensed matter physics chemistry Density of states Semiclassical physics
Zdroj:	Physical Review B. 51:4143-4149
ISSN:	1095-3795 0163-1829
DOI:	10.1103/physrevb.51.4143
Popis:	A semiclassical analysis of amorphous semiconductors is presented. This analysis, cast within an effective-mass setting, provides for the overall density-of-states by averaging a local density-of-states over a distribution of potential fluctuations. Our density-of-states results span the transition from the tail states to the band states, and both analytical and numerical results are obtained. We then determine the functional form of the optical-absorption coefficient, and show that both subgap and Tauc absorption edges are captured within this analytical framework. Finally, we apply this formalism to the case of hydrogenated amorphous silicon, and find that our results are consistent with those of experiment.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::30a08a9dc0eda569cb9ed329bc02d0d8 https://doi.org/10.1103/physrevb.51.4143 Zobrazit plný text záznamu