摘要
Er3+ 做的 SrTiO3 极其细小的粉末被稳固的州的反应在熔融的 NaCl 流动准备。结构的性质被 X 光检查衍射,地排放扫描电子显微镜学,和 Fourier 变换描绘红外线的光谱学。在 SrTiO3 的 Er3+ 的 Stokes 排放系列:从绿色接近红外线的区域的 Er3+ 在 514.5 nm 激光刺激下面被调查。Er3+ 的绿、红的 upconverted 光系列被 785 nm 激光在刺激下面测量进 4I9/2 水平。upconversion 机制通过激光力量依赖和 upconverted 排出物的 Er3+ 离子集中依赖详细被学习,并且结果证明激动的州的吸收和精力转移过程是为 upconversion 的可能的机制。upconversion 性质显示那 SrTiO3 :Er3+ 可以在 upconversion 黄磷被使用。
Er^3+ doped SrTiO3 ultrafine powders were prepared by solid state reaction in a molten NaCl flux. The structural properties were characterized by X-ray diffraction, field emission scanning electron microscopy, and Fourier transform infrared spectroscopy. The Stokes emission spectra of Er^3+ in SrTiO3:Er^3+ ranging from green to near infrared region were investigated under 514.5 nm laser excitation. The green and red upconverted luminescence spectra of Er^3+ were measured under excitation into the 419/2 level by 785 nm laser. The upconversion mechanisms were studied in detail through laser power dependence and Er^3+ ion concentration dependence of upconverted emissions, and results show that excited state absorption and energy transfer process are the possible mechanisms for the upconversion. The upconversion properties indicate that SrTiO3:Er^3+ may be used in upconversion phosphors.
基金
This work was supported by the Department of Education of Zhejiang Province (No.20060496) and the Natural Science Foundation of Zhejiang Province (No.Y406309).
关键词
SRTIO3
上转换发光
激发态吸收
能量传递
SrTiO3, Upconversion luminescence, Excited state absorption, Energy transfer