Structural and Optical Studies of 100 MeV Ni+7 Irradiated Cadmium Selenide Thin Films
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Date
2015
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Sumy State University
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Abstract
The effect of irradiation with Swift (100 MeV) Ni+ 7 ions on the structural and optical properties of
Cadmium Selenide (CdSe) thin films have been investigated at different fluencies in the range of 1 1011-
1 1013 ions/cm – 2. The CdSe films on glass substrates were prepared by thermal evaporation. The structural
and optical changes with respect to increasing fluence were observed by the means of X-ray diffraction
(XRD), UV-VIS and Raman spectroscopy. After irradiating the films with Ni+ 7 ions XRD show the increased
in peak intensity and crystallite size with increasing fluence. The UV-VIS-IR spectroscopy revealed
that there is decrease in band gap energy of the films after irradiation with increasing fluencies.
Raman spectrum for as deposited and irradiated films show two peak, one at 209 cm – 1 and at 410 cm – 1
which is assigned to the longitudinal optical (LO) phonon mode.
Keywords
CdSe thin films, Swift heavy ion irradiation, XRD, UV, Micro-Raman
Citation
Rajesh Singh, A.D. Yadav, V. Jadhav, S.K. Dubey, J. Nano- Electron. Phys. 7 No 3, 03002 (2015)