Title

Enhanced Luminescence In Camoo4: Eu3+ Red Phosphor Nanoparticles Prepared By Mechanochemically Assisted Solid State Meta-Thesis Reaction Method

Abstract

For the first time, CaMoO4: xEu3+ (x = 0.02, 0.04, 0.06, 0.08, 0.1) red phosphor nanoparticles were synthesized using the simple mechanochemically assisted solid state meta-thesis (SSM) reaction method and the luminescence properties as a function of Eu3+ ion concentration was investigated. The characteristics of the phosphor materials were analyzed using X-ray diffraction, fourier transform infrared spectroscopy, photoluminescence (PL) and diffuse reflectance spectroscopy. For 8 mol% of Eu3+ concentration, the phosphor shows an intensified excitation peak at 392 nm indicating a strong absorption. The PL emission spectra of CaMoO4: Eu3+ phosphors showed an intense peak at 615 nm (red) which corresponds to 5D0 → 7F2 transition of Eu3+. The optimal Eu3+ concentration in CaMoO4 phosphors for enhanced red emission occurs for 8 mol% and above this concentration, the emission intensity decreases due to quenching effect. The CIE colour coordinates of the CaMoO4: 0.08Eu3+ red phosphor coincide very well with the standard values of NTSC. The red emission intensity of the SSM prepared CaMoO4: 0.08Eu3+ red phosphor is 4.7 times greater than that of the commercial Y 2O2S: Eu3+ red phosphor and 1.6 times more than the same phosphor prepared by the solid state reaction method. © 2013 Springer Science+Business Media New York.

Publication Date

11-1-2013

Publication Title

Journal of Materials Science: Materials in Electronics

Volume

24

Issue

11

Number of Pages

4503-4509

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1007/s10854-013-1433-6

Socpus ID

84887060805 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/84887060805

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