发光学报, 2013, 34 (12): 1585, 网络出版: 2013-12-20
Yb3+/Er3+共掺BaGd2O4荧光粉的制备及其上转换发光性质
Synthesis and Characterization of Up-conversion Luminescence Material Er3+/Er3+ Co-doped BaGd2O4
摘要
采用溶胶-凝胶法制备了Yb3+/Er3+共掺杂BaGd2O4上转换荧光粉。研究了退火温度对BaGd2O4晶体结构的影响,以及Yb3+/Er3+共掺杂的BaGd2O4荧光粉在971 nm LED激发下,激发密度与上转换发射光功率及效率的关系。研究结果表明,尽管BaGd2O4与目前报道效率最高的Yb3+/Er3+共掺杂BaGd2ZnO5基质的最高声子能量相同,但光-光转换效率却相差82倍,极值量子效率相差7.8倍。结论认为,在声子能量不是很高的情况下,材料结构是影响上转换效率的主要因素。
Abstract
Yb3+/Er3+ co-doped BaGd2O4 phosphors were prepared by the sol-gel method. The influence of annealing temperature on BaGd2O4 crystal structure was investigated. Under 971 nm excitation, the dependence of the emission power and the up-conversion efficiency on the excitation density was studied. The obtained data show that the light conversion and absolute quantum efficiency of BaGd2O4∶Yb3+,Er3+ are 82 and 7.8 times smaller than that of BaGd2ZnO5∶Yb3+,Er3+, respectively. But the phonon energy of BaGd2O4 is almost the same with that of BaGd2ZnO5∶Yb3+,Er3+ which possesses the highest efficiency as ever reported. So, we can conclude that the material structure is the main influencing factor on the up-conversion efficiency when the phonon energy of the host is not very high.
杨艳民, 张娇, 苏献园, 米超, 李晓红, 于芳, 李志强. Yb3+/Er3+共掺BaGd2O4荧光粉的制备及其上转换发光性质[J]. 发光学报, 2013, 34(12): 1585. YANG Yan-min, ZHANG Jiao, SU Xian-yuan, MI Chao, LI Xiao-hong, YU Fang, LI Zhi-qiang. Synthesis and Characterization of Up-conversion Luminescence Material Er3+/Er3+ Co-doped BaGd2O4[J]. Chinese Journal of Luminescence, 2013, 34(12): 1585.