Title

Band gap energy modifications observed in trivalent In substituted nanocrystalline SnO2

Authors

Authors

C. Drake;S. Seal

Comments

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Abbreviated Journal Title

Appl. Phys. Lett.

Keywords

OXIDE THIN-FILM; OPTICAL-PROPERTIES; HYDROGEN SENSOR; NANOPARTICLES; SIZE; Physics, Applied

Abstract

The effect of In doping concentration on the optical band gap of nano-SnO2 is investigated as a function of calcination temperature. Changes in the band gap explain the room temperature H-2 gas sensing of doped nano-SnO2. The band gap was found to be lower than those reported for SnO2 (3.6 eV) from 2.55 to 3.43 eV and may be explained by the presence of nonequilibrium oxygen vacancies in the oxide lattice and band bending effects at the nanoscale. (c) 2007 American Institute of Physics.

Journal Title

Applied Physics Letters

Volume

90

Issue/Number

23

Publication Date

1-1-2007

Document Type

Article

Language

English

First Page

3

WOS Identifier

WOS:000247145500075

ISSN

0003-6951

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