Nakkiran, A. and Thirumalai, J. and Jagannathan, R. (2007) Luminescence blinking in Eu3+ doped yttrium oxysulfide (Y2O2S:Eu3+) quantum-dot ensembles: Photo-assisted relaxation of surface state(s). Chemical Physics Letters, 436. pp. 155-161. ISSN 0009-2614

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Abstract

Ensembles of Y2O2S:Eu3+ widegap semiconductor nano-crystals exhibit ON–OFF fluorescence blinking phenomenon, which mimic II–VI semiconductor quantum-structures. Attempt has been made to explain this phenomenon under the ambit of diffusion controlled electron transfer (DCET) model. Insights derived using opto-impedance technique in conjunction with the DCET model clearly establish the relaxation of surface state(s) through a diffusion process. Ensembles of Y2O3:Eu3+ nano-crystals, the insulating counterpart investigated for comparison does not show such fluorescence blinking.

Item Type:	Article
Subjects:	Electrochemical Materials Science
Divisions:	UNSPECIFIED
Depositing User:	ttbdar CECRI
Date Deposited:	26 Mar 2012 17:49
Last Modified:	26 Mar 2012 17:49
URI:	http://cecri.csircentral.net/id/eprint/583

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