Improved NIR emission from Tb3+, Yb3+ and Nd3+ co-doped La2O3 nano-phosphor

被引：1
|
作者：
Jain, Neha [1 ]
Singh, Rajan Kumar [1 ]
Bin Masood, Khalid [1 ]
Singh, Jai [1 ,2 ]
机构：
[1] Dr Hari Singh Gour Vishwavidyalaya, Dept Phys, Sagar 470003, MP, India
[2] Guru Ghasidas Univ, Dept Phys, Bilaspur, CG, India
来源：
SN APPLIED SCIENCES | 2020年 / 2卷 / 03期
关键词：
La2O3; X-ray diffraction; Energy transfer; Phosphors; UP-CONVERSION; ER3+; TM3+; EU3+;
D O I：
10.1007/s42452-020-2185-6
中图分类号：
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号：
07 ; 0710 ; 09 ;
摘要：
NIR and visible emission have been reported from Tb3+, Yb3+ and Nd3+ doped La2O3. XRD, TEM and HRTEM corroborate good crystallinity of the nano-phosphor. The average particle size is around 15 nm examined via TEM and HRTEM. The photoluminescence up-conversion spectra of Tb3+ and Yb3+ co-doped La2O3 exhibited characteristic emission peaks of Tb3+ ion at 480, 544 and 610 nm. It is possible due to the absorption of two 980 nm pump photons by Tb3+ ion via Yb3+ sensitizer. The energy migration from Tb3+ to Nd3+ takes place so that the intensity of 820 nm (F-4(5/2), H-2(9)/2 -> I-4(9/2)) is increased significantly. The energy transfer between these two ions reduces the intensity of 544 nm Tb3+ ion whereas the intensity of 820 nm improved. Energy transfer mechanism between Tb3+, Nd3+ and Yb3+ ions has been discussed in detail. It would be a promising candidate for solar cells and biomedical applications.
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页数：5
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