Optical properties of ZnS:Mn2+ yellow nanophosphor prepared by spray pyrolysis
|Sung Hoon Lee 1, Je Hong Park 1, Jong Su Kim 1, Tae Wan Kim 2, Hong Lee Park 2|
1. Pukyong National University, Dept. of Image System, Nam-Gu, Young-Dang-Dong, Busan 608-739, Korea, South
Spray pyrolysis was applied to prepare ZnS:Mn2+ yellow nanophosphor. As an increase of pH of spraying solution, the ZnS:Mn2+ nanophosphor showed the hexagonal-dominant phase, whereas, as an increase of firing temperature for spray pyrolysis, it showed the cubic-dominant phase. The emission intensity of the ZnS:Mn2+ nanophosphor was optimized at the pH of 3.5 and the temperature of 900 ℃. The ZnS:Mn2+ nanophosphor showed the broader excitation spectrum but no difference in the emission spectrum in comparison with the microphosphor synthesized by solid-state reaction. The temperature-dependence photoluminescence showed the different spectroscopic behavior from the microphosphor. The time-resolved photoluminescence show slightly longer decay time than the microphosphor. These behaviors can be explained in terms of the interaction of Mn2+ state and impurity level of nanophosphor.
Presentation: Poster at E-MRS Fall Meeting 2006, Symposium C, by Sung Hoon Lee
See On-line Journal of E-MRS Fall Meeting 2006
Submitted: 2006-08-06 10:04 Revised: 2009-06-07 00:44
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