Effect of oxidation on the thermoelectric properties of PbTe and PbS epitaxial films
- 19 March 2001
- journal article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 78 (12) , 1661-1663
- https://doi.org/10.1063/1.1355995
Abstract
We report on the thickness d dependences of the Seebeck coefficient, electrical conductivity, and Hall coefficient of PbTe and PbS epitaxial thin films (d=5–200 nm), prepared by thermal evaporation in vacuum and deposition on (001) KCl substrates. The oxidation of the films in air at 300 K leads to a sign inversion of the carrier type from n to p in films with d⩽125 and 110 nm for PbTe and PbS, respectively. The observed d dependences are interpreted in terms of compensating acceptor states created by oxygen on the film surface.Keywords
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