Synthesis of wurtzite-phase ZnS nanocrystal and its optical properties

Tiwary, CS and Kumbhakar, P and Mitra, AK and Chattopadhyay, K (2009) Synthesis of wurtzite-phase ZnS nanocrystal and its optical properties. In: Journal of Luminescence, 129 (11). pp. 1366-1370.

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Abstract

The wurtzite phase of ZnS nanocrystal has been prepared by annealing in 200-600 degrees C temperature range, its cubic phase of 2-3 nm size. prepared through soft chemical method. Results of isochronal experiments of 2 h at different temperatures indicate that visible transformation to wurtzite from cubic ZnS appears at a temperature of 400 degrees C, which is about three times smaller than that of bulk ZnS phase transition temperature. The phases, nanostructures, and optical absorption characteristics are obtained through X-ray diffraction. transmission electron microscopy, and UV-visible absorption spectroscopy. A stable and green photoluminescence emission peaked at 518 nm is observed from the 600 degrees C annealed samples, under ultraviolet light excitation.

Item Type:	Journal Article
Publication:	Journal of Luminescence
Publisher:	Elsevier Science B.V.
Additional Information:	Copyright of this article belongs to Elsevier B. V., 2009
Keywords:	Zinc sulphide; Wurtzite phase; Nanostructures; Photoluminescence; Characterization
Department/Centre:	Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Date Deposited:	17 Dec 2009 11:15
Last Modified:	19 Sep 2010 05:49
URI:	http://eprints.iisc.ac.in/id/eprint/24216

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