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Title:  Role of SiO2 in Zn2SiO4:Mn2+ phosphor used in optoelectronic materials
Authors: Parmar, M C
Zhuang, W D
Murthy, K V R
Huang, X W
Hu, Y S
Natarajan, V
Keywords: Phosphors
X-ray method
Issue Date: Jun-2009
Publisher: CSIR
Abstract: Zn2-xMnxSiO4 is a classical green phosphor, and it has been used in many applications, such as CCFL, CRT, PDP etc. In this paper, Zn2SiO4:Mn2+ green phosphor is fabricated with the solid-state reaction method. Photoluminescence and crystalline properties are examined as functions of the firing temperatures. Zn2-xMnxSiO4 is ground and fired at 1200oC for 4 h in air, but intensity of emission is weak. Therefore, the conditions of firing are changed and Zn2-xMnxSiO4 are ground and fired at 1000oC for 2 h in air and again ground and fired at 1200 oC for 4 h in air respectively. When varies SiO2 value from 0.9 to 1.8 however the ZnO is 1.92 as well as MnCO3 is 0.08 are constant, The SiO2 concentration (1.1) show good PL spectra. The PL peak observed at 524 nm in these phosphors suggests their potential as green emitting phosphors under 254 nm excitation.
Page(s): 185-187
ISSN: 0975-1017 (Online); 0971-4588 (Print)
Source:IJEMS Vol.16(3) [June 2009]

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