Mandal, Abhijit and Saha, Jony and De, Goutam (2011) Stable CdS QDs with intense broadband photoluminescence and high quantum yields. Optical Materials , 34 (1). pp. 6-11. ISSN 0925-3467

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Abstract

Aqueous synthesis of CdS quantum dots (QDs) using thiolactic acid (TLA) as a capping agent was reported. These QDs exhibited excellent colloidal and photostability over a span of 2 years and showed intense broadband and almost white photoluminescence suitable for solid state lighting devices. The photoluminescence (PL) property of the aqueous CdS QDs is optimized by adjusting various processing parameters. The highest quantum yield (QY) achieved for TLA capped CdS QDs of average size 3.5 nm was similar to 50%. Luminescence lifetime measurements of CdS-TLA QDs indicated longer lifetimes and a larger contribution of the surface-related emission, indicating removal of quenching defects. (C) 2011 Elsevier B.V. All rights reserved.

Item Type:	Article
Uncontrolled Keywords:	CdS QDs; Thiolactic acid; Photoluminescence; High quantum yield
Subjects:	Physical Properties
Divisions:	Nano-Structured Materials
Depositing User:	Bidhan Chaudhuri
Date Deposited:	16 Jan 2012 12:09
Last Modified:	25 Feb 2013 08:18
URI:	http://cgcri.csircentral.net/id/eprint/289

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