Optical Coefficients and PL Spectra with Variation in Ga-content in GaSeTe Thin Films: Visible Spectrum

Neeru, Chaudhary; Tripathi, S.K.; Navdeep, Goyal

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Title	Optical Coefficients and PL Spectra with Variation in Ga-content in GaSeTe Thin Films: Visible Spectrum
Authors	Neeru, Chaudhary Tripathi, S.K. Navdeep, Goyal
ORCID
Keywords	optical constants optical band gap semiconductors coordination number cohesive energy electronegativity
Type	Article
Date of Issue	2016
URI	http://essuir.sumdu.edu.ua/handle/123456789/47359
Publisher	Sumy State University
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Citation	Neeru, Chaudhary Optical Coefficients and PL Spectra with Variation in Ga-content in GaSeTe Thin Films: Visible Spectrum [Текст] / C. Neeru, S.K. Tripathi, G. Navdeep // Журнал нано- та електронної фізики. - 2016. - Т.8, №3. - 03019
Abstract	The optical properties (transmission and emission) for Ga[x]Se[85 – x]Te[15](x = 0, 2, 6, 10, 15) semiconductor were studied using UV Visible spectra and PL Spectra of thermally evaporated thin films. Optical band gap is found to be decreasing with increased Ga-content in the compositions. Increase in refractive index, dielectric constants and absorption coefficient is observed in the wavelength region 550-850 nm.The fall in the optical band gap is explained with chemical bond approach and electro negativity. The increase in refractive index (n) is interpreted in association to the mean coordination number and cohesive energy. Direct band gap is found to be allowed in these thin films.
Appears in Collections:	Журнал нано- та електронної фізики (Journal of nano- and electronic physics)