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Title: Optical band gap of Bi2Te2.8Se0.2 thin films
Authors: Soni, P H
Otia, J R
Desai, C F
Issue Date: Jun-2004
Publisher: CSIR
Series/Report no.: Int. Cl.7 H01 L 29/18
Abstract: Bi2Te2.8Se0.2 thin films were grown using the thermal evaporation technique on a (001) face of NaCl crystal as a substrate at room temperature. The optical absorption was measured in the wave number range 500-4000 cm-1. From the optical absorption data the band gap has been evaluated and studied as a function of the film thickness and deposition temperature. The data indicate absorption through direct interband transition with a band gap of around 0.24 eV.
Description: 221-223
ISSN: 0975-1017 (Online); 0971-4588 (Print)
Appears in Collections:IJEMS Vol.11(3) [June 2004]

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