Luminescence enhancement of (Ca,Zn)TiO3:Pr3+ phosphor using nanosized silica powder
Luminescence enhancement of (Ca,Zn)TiO3:Pr3+ phosphor using nanosized silica powder
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DOI：
10.1063/1.2338789
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发表时间：
2006-08
影响因子：
4
通讯作者：
D. Haranath;A. F. Khan;H. Chander
中科院分区：
文献类型：
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作者：
D. Haranath;A. F. Khan;H. Chander
介绍了纳米硅粉与钙、锌、钛、镨的氧化物混合物高温汞化的发光增强结果。（Ca,Zn）TiO3:Pr3+荧光粉在环境光/紫外激发下，在~ 614nm处表现出强烈的窄带发射，这与Pr3+典型的H43→D21跃迁有关。对于适应黑暗的人眼来说，观察到的红色发射相当稳定且时间长（约60分钟），并且长时间暴露于周围/大气中，光学特性没有明显的退化。纳米二氧化硅粉的加入使样品的光致发光强度比未添加的样品提高了近1.6倍。本文的结果与先前报道的Pr3+掺杂-(Ca,Zn)TiO3荧光粉和硅基持久性荧光粉的结果完全不同。
The results pertaining to luminescence enhancement due to high-temperature amalgamation of nanometer-sized silica powder and the oxide mixture of calcium, zinc, titanium, and praseodymium are presented. The (Ca,Zn)TiO3:Pr3+ phosphor showed an intense and narrow band emission at ∼614nm under ambient light/ultraviolet excitation, which is associated with the typical H43→D21 transition of Pr3+. The observed red emission is quite stable and long (∼60min) for a dark-adapted human eye and shows no appreciable degradation in the optical properties for prolonged exposure to surrounding/atmosphere. With the addition of nanosized silica powder, the photoluminescence was augmented nearly 1.6 times as that of unadded sample. The present results are entirely different from those reported previously for Pr3+ doped-(Ca,Zn)TiO3 phosphor and silica-based persistent phosphors.