Liao Meisong, Hu Lili, Fang Yongzheng, Zhang Junjie, Sun Hongtao, Xu Shiqing, Zhang Liyan
Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai, PR China.
Spectrochim Acta A Mol Biomol Spectrosc. 2007 Nov;68(3):531-5. doi: 10.1016/j.saa.2006.12.023. Epub 2006 Dec 22.
Er3+, Yb3+ and Tm3+ codoped fluorophosphate glasses emitting blue, green and red upconversion luminescence at 970 nm laser diode excitation were studied. It was shown that Tm3+ behaves as the sensitizer to Er3+ for the green upconversion luminescence through the energy transfer process: Tm3+:3H4+Er3+:4I 15/2-->Er3+:4I 9/2+Tm3+:3H6, and for the red upconversion luminescence through the energy transfer process: Tm3+:3F4+Er3+:4I 11/2-->Tm3+:3H6+Er3+:4F 9/2. Moreover, Er3+ acts as quenching center for the blue upconversion luminescence of Tm3+. The sensitization of Tm3+ to Er3+ depends on the concentration of Yb3+. The intensity of blue, green and red emissions can be changed by adjusting the concentrations of the three kinds of rare earth ions. This research may provide useful information for the development of high color and spatial resolution devices and white light simulation.
研究了在970nm激光二极管激发下发射蓝色、绿色和红色上转换发光的铒离子（Er3+）、镱离子（Yb3+）和铥离子（Tm3+）共掺杂氟磷酸盐玻璃。结果表明，通过能量转移过程：Tm3+:3H4+Er3+:4I 15/2→Er3+:4I 9/2+Tm3+:3H6，Tm3+作为Er3+绿色上转换发光的敏化剂；通过能量转移过程：Tm3+:3F4+Er3+:4I 11/2→Tm3+:3H6+Er3+:4F 9/2，Tm3+作为Er3+红色上转换发光的敏化剂。此外，Er3+作为Tm3+蓝色上转换发光的猝灭中心。Tm3+对Er3+的敏化作用取决于Yb3+的浓度。通过调节三种稀土离子的浓度可以改变蓝色、绿色和红色发射的强度。该研究可为高颜色和空间分辨率器件的开发以及白光模拟提供有用信息。
