Optical properties of ZnS:Mn2+ yellow nanophosphor prepared by spray pyrolysis

Sung Hoon Lee 1Je Hong Park 1Jong Su Kim 1Tae Wan Kim 2Hong Lee Park 2

1. Pukyong National University, Dept. of Image System, Nam-Gu, Young-Dang-Dong, Busan 608-739, Korea, South
2. Yonsei University, Institute of Physics and Applied Physics (IPAP), Seoul 120-749, Korea, South

Abstract

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.

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  1. Comparative analysis of ZnS:Mn2+ nanophosphors prepared by low-temperature precipitation and hydrothermal methods

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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