<smarttagtype namespaceuri="urn:schemas-microsoft-com:office:smarttags" name="chmetcnv"> Role of SiO₂ in Zn₂SiO₄:Mn²⁺ phosphor used in optoelectronic materials </smarttagtype>

Abstract

Zn_2-xMn_xSiO₄ 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. Zn_2-xMn_xSiO₄ is ground and fired at 1200^oC for 4 h in air, but intensity of emission is weak. Therefore, the conditions of firing are changed and Zn_2-xMn_xSiO₄ are ground and fired at 1000^oC 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.