Singh, A. K. and Singh, S. K. and Kumar, Pawan and Gupta, Bipin Kumar and Prakash, R. and Rai, S. B. (2014) Lanthanide Doped Dual-Mode Nanophosphor as a Spectral Converter for Promising Next Generation Solar Cells. Science of Advanced Materials, 6 (2). pp. 405-412. ISSN 1947-2935

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Abstract

Herein, we have successfully synthesized a lanthanide based dual-mode nanophosphor (Y0.975Yb0.020 Ho0.005VO4), capable to emit both by down-shifting and upconversion processes, via facile combustion method. The dual-mode emission in phosphor materials is still an unexplored area. The present work covers the study of structure, surface morphology, luminescent behavior and decay profile of the synthesized nanophosphor. The nanophosphor exhibits strong green emission (corresponding to F-5(4), S-5(2) -> I-5(8) transition of Ho3+ ion) on UV excitation (lambda(ex) = 318 nm), via an excited state energy transfer from the charge transfer band of [VO4](3-) to F-5(4) state of Ho3+ ions. On the other hand, an efficient red emission of Ho3+ (F-5(5) -> I-5(8)) is obtained upon infrared excitation (lambda(ex) = 976 nm). We propose that the dual-mode nanophosphor could be an exceptional prospect to incorporate in next generation solar cell applications.

Item Type:	Article
Additional Information:	Copyright for this article belongs to M/S American Scientific Publishers.
Uncontrolled Keywords:	Lanthanide, Nanophosphor, Optical Properties, Upconversion, Solar Cells
Subjects:	Materials Science Physics
Divisions:	UNSPECIFIED
Depositing User:	Dr. Rajpal Walke
Date Deposited:	19 Oct 2015 05:37
Last Modified:	19 Oct 2015 05:37
URI:	http://npl.csircentral.net/id/eprint/1366

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