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Title of Journal: Appl Phys A

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Abbravation: Applied Physics A

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Springer Berlin Heidelberg

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DOI

10.1016/0090-4295(82)90586-6

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1432-0630

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Study of the optical properties of CuAlSSubscript

Authors: S M Ahmad
Publish Date: 2017/03/08
Volume: 123, Issue: 4, Pages: 228-
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Abstract

CuAlS2 thin films were successfully deposited on glass substrates using two methods chemical spray pyrolysis CSP and chemical bath deposition CBD It was confirmed from the Xray diffraction XRD analysis that CSP films exhibited a polycrystalline nature while amorphous nature was diagnosed for CBD films Also XRD analysis was utilized to compute grain size strain and dislocation density Surface morphology was characterized using scanning electron microscope and photomicroscope images The optical absorption measurement revealed that the direct allowed electronic transition with band gaps 28 eV and 30 eV for CBD and CSP methods respectively The optical constants such as extinction coefficient k refractive index n real and imaginary dielectric constants ε 1 ε 2 were discussed The photoluminescence PL spectra of CuAlS2 thin films appeared as a single peak for each of them and this is attributed to bandtoband transition

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