Ln_(2)O_(3)(Ln=Er^(3+),Sm^(3+))稀土氧化物的高效上转换宽带发光性能研究

THE EFFICIENT UPCONVERSION BROADBAND LUMINESCENCE PERFORMANCE STUDY OF Ln_(2)O_(3)(LN=Er^(3+),Sm^(3+))RARE EARTH OXIDES

通过简单的共沉淀法成功制备了Ln_(2)O_(3)(Ln=Er^(3+),Sm^(3+))纳米发光材料,通过光子雪崩过程实现了Ln_(2)O_(3)(Ln=Er^(3+),Sm^(3+))纳米发光材料的高效上转换宽带发光。通过光谱测试发现在1.47 W功率密度的980 nm光源激发下,所制备的上转换发光材料Er_(2)O_(3) 和Sm_(2)O_(3)的发光强度分别是商用NaYF_(4):Yb^(3+),Er^(3+)荧光粉的4.13倍和2.45倍,经过认真分析材料的上转换发光机制,发现材料的宽带发光主要来源于Ln_(2)O_(3)(Ln=Er^(3+),Sm^(3+))基质中的氧缺陷。

Ln_(2)O_(3)(Ln=Er^(3+),Sm^(3+))nanoparticles(NPs)were successfully prepared through a simple co-precipitation method.The highly efficient upconversion(UC)broad band emission in Ln_(2)O_(3)(Ln=Er^(3+),Sm^(3+))NPs is realized through the photon avalanche process.The emission intensity of Er_(2)O_(3) and Sm_(2)O_(3) is~4.13 folds and~2.45 folds than commercial NaYF_(4):Yb^(3+),Er^(3+)phosphor at 1.47 W power density of 980 nm excitation light source,respectively.The broad band emissions are mainly originated from the oxygen defect in Ln_(2)O_(3)(Ln=Er^(3+),Sm^(3+))host by carefully discussing the detail UCL mechanism.