Hakeem D A, Kim Y, Park K
J Nanosci Nanotechnol. 2016 Feb;16(2):1761-4. doi: 10.1166/jnn.2016.12021.
Ba(1--x)Al2Si2O8:xTb3+ (0.03 < or = x < or = 0.12) green phosphors are prepared by solution combustion method. The photoluminescence properties of the Ba(1--x)Al2Si2O8:xTb3+ phosphors are studied as a function of Tb3+ concentration. The Ba(1--x)Al2Si2O8:xTb3+ phosphors crystallize in a hexagonal crystal structure. The excitation spectra consist of two broad bands with maxima at 238 nm and 265 nm and several weak peaks in the range of 310-500 nm. Strong emission peaks are observed at 484, 540, 589, and 612 nm due to the (5)D4 --> (7)F6, (5)D4 --> (7)F5, (5)D4 --> (7)F4, and (5)D4 --> (7)F3 tran- sitions of the Tb3+, respectively. The emission peak (540 nm) from the (5)D4 --> (7)F3 transition is dominant, indicating green light emission. Ba(1--x)Al2Si2O8:xTb3+ phosphor shows the strongest green emission intensity. The Ba(1--x)Al2Si2O8:xTb3+ can be considered a promising green phosphor for white LEDs applications.
采用溶液燃烧法制备了Ba(1–x)Al2Si2O8:xTb3+（0.03≤x≤0.12）绿色荧光粉。研究了Ba(1–x)Al2Si2O8:xTb3+荧光粉的光致发光性能随Tb3+浓度的变化。Ba(1–x)Al2Si2O8:xTb3+荧光粉结晶为六方晶体结构。激发光谱由两个最大值分别位于238 nm和265 nm的宽带以及310 - 500 nm范围内的几个弱峰组成。由于Tb3+的(5)D4→(7)F6、(5)D4→(7)F5、(5)D4→(7)F4和(5)D4→(7)F3跃迁，分别在484、540、589和612 nm处观察到强发射峰。来自(5)D4→(7)F3跃迁的发射峰（540 nm）占主导，表明发出绿光。Ba(1–x)Al2Si2O8:xTb3+荧光粉显示出最强的绿色发射强度。Ba(1–x)Al2Si2O8:xTb3+可被认为是用于白光发光二极管应用的一种有前途的绿色荧光粉。
