Mishra, Savvi and Swati, G. and Rajesh, B. and Tyagi, Kriti and Gahtori, Bhasker and Sivaiah, B. and Vijayan, N. and Dalai, M. K. and Dhar, A. and Auluck, S. and Jayasimhadri, M. and Haranath, D. (2016) Luminescence and advanced mass spectroscopic characterization of sodium zinc orthophosphate phosphor for low-cost light-emitting diodes. Luminescence, 31 (2). 348-355 . ISSN 1522-7235

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Abstract

A new rare-earth-free NaZnPO4:Mn2+ (NZP:Mn) phosphor powder has been developed by our group and investigated meticulously for the first time using secondary ion mass spectroscopy and chemical imaging techniques. The studies confirmed the effective incorporation of Mn2+ into the host lattice, resulting in an enhancement of photoluminescence intensity. Phase purity has been verified and structure parameters have been determined successfully by Rietveld refinement studies. The NZP:Mn phosphor powder exhibits strong absorption bands in the ultraviolet and visible (300-470 nm) regions with a significant broad yellow-green (similar to 543 nm) emission due to the characteristic spin forbidden d-d transition ((4)T(1)(6)A(1)) of Mn2+ ions, indicating weak crystal field strength at the zinc-replaced manganese site. The decay constants are a few milliseconds, which is a pre-requisite for applications in many display devices. The results obtained suggest that this new phosphor powder will find many interesting applications in semiconductor physics, as cost-effective light-emitting diodes (LEDs), as solar cells and in photo-physics.

Item Type:	Article
Additional Information:	Copyright for this article belongs to M/s Wiley.
Uncontrolled Keywords:	luminescence orthophosphates ToF SIMS
Subjects:	Biochemistry & Molecular Biology
Divisions:	UNSPECIFIED
Depositing User:	Dr. Rajpal Walke
Date Deposited:	30 Jan 2018 11:17
Last Modified:	30 Jan 2018 11:17
URI:	http://npl.csircentral.net/id/eprint/2270

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