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Title: Optical band gap of Bi<sub>2</sub>Te<sub>2.8</sub>Se<sub>0.2</sub> thin films
Authors: Soni, P H
Otia, J R
Desai, C F
Issue Date: Jun-2004
Publisher: CSIR
Series/Report no.: Int. Cl.<sup>7</sup> H01 L 29/18
Abstract: Bi<sub>2</sub>Te<sub>2.8</sub>Se<sub>0.2 </sub>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<sup>-1</sup>. 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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