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Title: <smarttagtype namespaceuri="urn:schemas-microsoft-com:office:smarttags" name="chmetcnv"> Role of SiO<sub>2</sub> in Zn<sub>2</sub>SiO<sub>4</sub>:Mn<sup>2+</sup> phosphor used in optoelectronic materials </smarttagtype>
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: Zn<sub>2-x</sub>Mn<sub>x</sub>SiO<sub>4</sub> is a classical green phosphor, and it has been used in many applications, such as CCFL, CRT, PDP etc. In this paper, Zn<sub>2</sub>SiO<sub>4</sub>:Mn<sup>2+</sup> green phosphor is fabricated with the solid-state reaction method. Photoluminescence and crystalline properties are examined as functions of the firing temperatures. Zn<sub>2-x</sub>Mn<sub>x</sub>SiO<sub>4</sub> is ground and fired at 1200<sup>o</sup>C for 4 h in air, but intensity of emission is weak. Therefore, the conditions of firing are changed and Zn<sub>2-x</sub>Mn<sub>x</sub>SiO<sub>4</sub> are ground and fired at 1000<sup>o</sup>C for 2 h in air and again ground and fired at 1200<sup> o</sup>C for 4 h in air respectively. When varies SiO<sub>2</sub> value from 0.9 to 1.8 however the ZnO is 1.92 as well as MnCO<sub>3</sub> is 0.08 are constant, The SiO<sub>2</sub> 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.
Description: 185-187
ISSN: 0975-1017 (Online); 0971-4588 (Print)
Appears in Collections:IJEMS Vol.16(3) [June 2009]

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