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Effect of High Substrate Temperature on Morphology, Structural and Optical Properties of CdZnS Nanostructures

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Abstract:

One-dimensional CdZnS nanostructures have been synthesized through the sublimation. Effect of high substrate temperature on morphology, structural and optical properties of these nanostructures has been studied. X-Ray diffraction peak intensity, lattice parameters, crystallite size decreased with an increase in substrate temperature. The morphology changed with the increase in the substrate temperature. Raman Spectroscopy confirmed the existence of constituent elements in CdZnS solid solution and an increase of Zn concentration with the rise in substrate temperature. The nanostructures exhibited strong photoluminescence emission in the green light region with a substrate temperature-dependent blue shift of 53 meV in emission energy. The Stoke’s shift energy raised from 45 meV to 302 meV as the substrate temperature increased from 510 °C to 550 °C. The stoichiometric deviancies, crystallite size, and quantum confinement effects resulted into an increase in the optical band gap from 2.4 eV to 2.71 eV. The results showed that CdZnS nanostructures could be potential candidates for nanostructure based optoelectronics and photovoltaic devices.

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Periodical:

Materials Science Forum (Volume 886)

Pages:

24-31

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.886.24

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Online since:

March 2017

Authors:

Allah Bakhsh*, Iftikhar Hussain Gul, Ashari Maqsood, Shang Hsuan Wu, Ching Hsiang Chan, Yia Chung Chang

Keywords:

Nanostructures, Optical Properties, Photoluminescence, Raman Scattering, Vapor Deposition

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© 2017 Trans Tech Publications Ltd. All Rights Reserved

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