Enhanced cooperative quantum cutting in Tm3+- Yb3+ codoped glass ceramics containing LaF3 nanocrystals.
Tm(3+)-Yb(3+) codoped transparent oxyfluoride glass ceramics containing LaF(3) nanocrystals were obtained by thermal treatment on the as-made glasses. The formation of LaF(3) nanocrystals and the incorporation of Tm(3+) and Yb(3+) into LaF(3) nanocrystal lattice were confirmed by X-ray diffraction and high resolution transmission electron microscopy. Infrared quantum cutting involving Yb(3+) 950-1100 nm ((2)F(5/2)--> (2)F(7/2)) emission was achieved upon the excitation of the (1)G(4) energy level of Tm(3+) at 468 nm. We measured the photoluminescence properties of these glass ceramics. We also investigated the thermal treatment duration dependent quantum efficiency, and found that the quantum efficiency is 13% increased for the 0.5Tm(3+)-4Yb(3+) doped glass ceramic with a maximum value of 144%, and 16% increased for the 0.5Tm3+-8Yb3+ doped glass ceramic with a maximum value of 162%, respectively.
Ye
Song
S
State Key Laboratory of Silicon Materials, Zhejiang University, Hangzhou 310027, China. qjr@zju.edu.cn
Zhu
Bin
B
Luo
Jin
J
Chen
Jingxin
J
Lakshminarayana
Gandham
G
Qiu
Jianrong
J
D002516:Ceramics / Q000737:chemistry*; D003198:Computer Simulation; D004867:Equipment Design; D019544:Equipment Failure Analysis; D005459:Fluorides / Q000737:chemistry*; D005898:Glass / Q000737:chemistry*; D007811:Lanthanum / Q000737:chemistry*; D008027:Light; D008422:Materials Testing; D008962:Models, Theoretical; D045663:Quantum Dots; D011789:Quantum Theory; D012031:Refractometry; D012542:Scattering, Radiation
C083668:lanthanum trifluoride; D007811:Lanthanum; D005459:Fluorides