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Title: Structural and optical property characterization of epitaxial ZnO:Te thin films grown by pulsed laser deposition
Authors: Sahu, R.
Dileep, K.
Negi, D. S.
Nagaraja, K. K.
Shetty, S.
Datta, Ranjan
Keywords: Crystallography
Materials Science
Applied Physics
Laser epitaxy
Semiconducting II-VI materials
Magnetic Semiconductors
Publisher: Elsevier Science Bv
Citation: Journal of Crystal Growth
Sahu, R.; Dileep, K.; Negi, D. S.; Nagaraja, K. K.; Shetty, S.; Datta, R., Structural and optical property characterization of epitaxial ZnO:Te thin films grown by pulsed laser deposition. Journal of Crystal Growth 2015, 410, 69-76.
Abstract: We have investigated the Te atom incorporation, solubility, structural features and the corresponding optical property of epitaxial ZnO:Te thin film grown on c-plane sapphire by pulsed laser deposition. Incorporation of Te at the oxygen (Te-o) or zinc (Te-zn) site can be controlled through the deposition scheme to transfer Te during the film growth. Solubility of Teat the oxygen site is strongly dependent on the growth temperature and a maximum of similar to 4 at% Te is obtained at 400 degrees C with the film remained to be in epitaxial form. Lowering the temperature further increases Te incorporation but films turn out to be amorphous. For Teat the Zn site a maximum of similar to 3.4 at% is achieved with the film to be in the epitaxial form with tilt and phase separation is observed beyond this composition. Band gap decreases with Te incorporation both in the oxygen and zinc sites but decrease in band gap is found to be pronounced and composition dependent for the former case. (C) 2014 Elsevier B.V. All rights reserved,
Description: Restricted access
ISSN: 0022-0248
Appears in Collections:Research Articles (Ranjan Datta)

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