Preparation and luminescence properties of BaWO_4:Yb^(3+)/Tm^(3+) nano-crystal  

作　　者：贺超 杨魁胜 刘磊 司振君 

机构地区：[1]College of Materials Science and Engineering, Changchun University of Science and Technology

出　　处：《Journal of Rare Earths》2013年第8期790-794,共5页稀土学报（英文版）

基　　金：supported by National Natural Science Foundation of China Youth Science (20901011);Jilin Science and Technology Bureau (20091510)

摘　　要：This research investigated the effect of different contents of Tm3＋ and different concentration ratios of Yb/Tm on the lumi- nescent properties of BaWO4：yb3＋/Tm3＋ nano-crystal synthesized by the hydrothermal method. The results indicated that lumines- cence intensity reached the strongest when CTm=1.0 mol.% and Cyb/CTm=2：1. X-ray diffraction revealed the tetragonal system of BaWO4：Yb3＋/Tm3＋ and the grain sizes were between 31 and 45 nm according to Scherrer equation. The results of X-ray diffraction and scanning electron microscopy were similar. Four emission peaks at 454, 475, 647 and 790 nm including two blue emission peaks and two red emission peaks, corresponding to ID2→3F4, 1G4→3H6, IG4→3F4 and 3H4→3H6 transitions of Tm3＋, were observed under excitation of 980 nm semiconductor laser. Blue emissions at 454 and 475 um were four-photon and three-photon absorption respec- tively in accordance with the relationship between luminescence intensity and pump power.This research investigated the effect of different contents of Tm3＋ and different concentration ratios of Yb/Tm on the lumi- nescent properties of BaWO4：yb3＋/Tm3＋ nano-crystal synthesized by the hydrothermal method. The results indicated that lumines- cence intensity reached the strongest when CTm=1.0 mol.% and Cyb/CTm=2：1. X-ray diffraction revealed the tetragonal system of BaWO4：Yb3＋/Tm3＋ and the grain sizes were between 31 and 45 nm according to Scherrer equation. The results of X-ray diffraction and scanning electron microscopy were similar. Four emission peaks at 454, 475, 647 and 790 nm including two blue emission peaks and two red emission peaks, corresponding to ID2→3F4, 1G4→3H6, IG4→3F4 and 3H4→3H6 transitions of Tm3＋, were observed under excitation of 980 nm semiconductor laser. Blue emissions at 454 and 475 um were four-photon and three-photon absorption respec- tively in accordance with the relationship between luminescence intensity and pump power.

关 键 词：hydrothermal method BaWO4：Yb3＋ /Tm3＋ nano-crystal UP-CONVERSION rare earths 

分 类 号：TN248[电子电信—物理电子学]