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Influence of substrate temperature on the properties of electron beam evaporated ZnSe films

✍ Scribed by M. G. Syed Basheer Ahamed; V. S. Nagarethinam; A. R. Balu; A. Thayumanavan; K. R. Murali; C. Sanjeeviraja; M. Jayachandran

Publisher: John Wiley and Sons
Year: 2010
Tongue: English
Weight: 284 KB
Volume: 45
Category: Article
ISSN: 0232-1300
DOI: 10.1002/crat.200900614

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✦ Synopsis

Abstract

ZnSe films were deposited on glass substrates keeping the substrate temperatures, at room temperature (RT), 75, 150 and 250 °C. The films have exhibited cubic structure oriented along the (111) direction. Both the crystallinity and the grain size increased with increasing deposition temperature. A very high value of absorption co‐efficient (10^4^ cm^‐1^) is observed. The band gap values decrease from a value of 2.94 eV to 2.69 eV with increasing substrate temperature. The average refractive index value is in the range of 2.39 – 2.41 for the films deposited at different substrate temperatures. The conductivity values increases continuously with temperature. Laser Raman spectra showed peaks at 140.8 cm^‐1^, 246.7 cm^‐1^and 204.5 cm^‐1^which are attributable to 2TA LO phonon and TO phonon respectively. (© 2010 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

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