| 졸-겔법으로 제조한 Zn2SiO4:Mn, M(M=Cr, Ti) 녹색 형광체의 발광특성 |
| 안중인, 한정화1, 박희동 |
한국화학연구원 형광물질연구팀
1한라대학교 신소재공학과 |
| Luminescence Properties of Zn2SiO4:Mn, M(M=Cr, Ti) Green Phosphors Prepared by Sol-gel Method |
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| ABSTRACT |
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In order to improve the photoluminescent properties and crystallinity, Zn$_2$SiO$_4$:Mn, M(M=Cr, Ti) phosphors were synthesized by the sol-gel method. The willemite single phase was obtained at 110$0^{circ}C$, which is lower temperature than that of the conventional solid-state reaction (130$0^{circ}C$). The characteristics of fired samples were obtained by a 147 nm excitation source under VUV (Vacuum Ultraviolet). To investigation the effect of co-dopant, the content of Mn and the ratio of $H_2O$ to TEOS was fixed as 2 ㏖% and 36. 1, respectively. The highest emission intensity was obtained when the concentration of Cr and Ti was 0.1 ㏖% relative to Zn$_2$SiO$_4$:Mn. While the emission intensity decrease continuously the decay time improved as increased the Cr concentration. In the case of Ti added samples, however, the emission intensity increase up to 2 ㏖％ concentration. |
| Key words:
Phosphor, PDP, Sol-gel method, Photoluminescence, Decay time |
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