New sensitizing roles of defect-induced self-activator in Sr2.5-3x/2Ca0.5PrxAl1-yInyO4F (0.001 <= x <= 0.05 y=0, 0.1) Phosphors

作者：Park Sangmoon^*

来源：Optical Materials, 2013, 35(3): 516-519.

DOI：10.1016/j.optmat.2012.10.024

• Sensitizing
• Oxyfluoride
• Defect-induced self-activating
• Phosphors

Luminescent materials composed of Sr2.5-3x/2Ca0.5PrxAl1-yInyO4F (0.001 <= x <= 0.05 y = 0, 0.1) were prepared by solid-state reaction. The dependence of the luminescent intensity of Pr3+-doped oxyfluorides on the Pr3+ content (x = 0.001-0.05) is also discussed. The photoluminescence (PL) properties of Pr3+-doped in both Sr2.5Ca0.5Al1-yInyO4F and Sr2.5Ca0.5Al1-yInyO4-alpha F1-delta oxyfluorides were scrutinized. Replacement of Al3+ by In3+ in the Pr3+-doped host structure sensitized the material and enabled a novel and high-energy charge-transfer. The desired CIE values with emission through the red, orange, yellow, and blue-green regions of the spectra in the oxyfluorides were achieved. The effective sensitization using the defect-induced self-activating oxyfluoride phosphors will be useful in applications related to NUV-LEDs.

• 出版日期2013-1