Kharkwal, Aneeta and Jain, Kiran and Tyagi, S. B. and Singh, A. K. and Sharma, Shailesh N. and Kharkwal, Mamta (2014) One-pot synthesis of CuInS2 and CuInS2/MS (M=Cd, Zn) core-shell luminescent nanocrystals: a low-temperature and low-cost approach. Colloid and Polymer Science, 292 (11). pp. 2913-2926. ISSN 0303-402X

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Abstract

The single-pot synthesis of highly crystalline and fluorescent chalcopyrite CuInS2 (CIS) colloidal nanoparticles has been reported by thermal decomposition of metal ethyl xanthate (at similar to 110 degrees C) for the first time. The fluorescence emission wavelength can also be readily tuned from the UV to the visible region by merely prolonging the reaction time, as the PL emission may be varied from 550 to 675 nm. The synthesized CIS is subjected to postdeposition treatment with CdS/ZnS in one pot route using cadmium/zinc xanthate at low temperature (similar to 80 degrees C) to improve the quantum yield of core-shell (CIS/CdS or ZnS) nanocrystallites as compared to CIS core. The stability of core-shell particularly CIS/ZnS system upon continuous laser exposure suggests the formation of surface bonds with superior mechanical stability. This low-cost synthesis of such nontoxic QDs using green chemical routes is a promising approach for the fabrication of optoelectronic and biosensing devices.

Item Type:	Article
Additional Information:	Copyright for this article belongs to M/S Springer Verlag.
Uncontrolled Keywords:	Fluorescent chalcopyrite CdS and ZnS capping Metal xanthate
Subjects:	Chemistry Polymer Science
Divisions:	UNSPECIFIED
Depositing User:	Dr. Rajpal Walke
Date Deposited:	29 Oct 2015 11:09
Last Modified:	29 Oct 2015 11:09
URI:	http://npl.csircentral.net/id/eprint/1447

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