Color-tunable luminescence for Bi3+/Ln3+:YVO4 (Ln = Eu, Sm, Dy, Ho) nanophosphors excitable by near-ultraviolet light.
Bi(3+)/Ln(3+):YVO(4) nanocrystals with a mean size of 6 nm are prepared through a mixed solvothermal route. With Bi(3+) doping, the excitation band corresponding to the Ln(3+) emission is shifted from 280 nm to 345 nm, owing to the occurrence of Bi(3+) --> V(5+) metal-metal charge transfer and the subsequent energy transfer to Ln(3+) ions. Under near-ultraviolet excitation, the emission color of Bi(3+)/Ln(3+):YVO(4) nanophosphors can be easily tuned by changing the Ln(3+) ions.
Chen
Daqin
D
State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, PR China.
Yu
Yunlong
Y
Huang
Ping
P
Lin
Hang
H
Shan
Zhifa
Z
Zeng
Lingwei
L
Yang
Anping
A
Wang
Yuansheng
Y