2D Layered Materials of Rare-Earth Er-Doped MoS2 with NIR-to-NIR Down- and Up-Conversion Photoluminescence.
A 2D system of Er-doped MoS2 layered nanosheets is developed. Structural studies indicate that the Er atoms can be substitutionally introduced into MoS2 to form stable doping. Density functional theory calculation implies that the system remains stable. Both NIR-to-NIR up-conversion and down-conversion light-emissions are observed in 2D transition metal dichalcogenides, ascribed to the energy transition from Er(3+) dopants.
Department of Applied Physics, The Hong Kong Polytechnic University, Hong Kong, P. R. China.
Gongxun
G
Bai
Department of Applied Physics, The Hong Kong Polytechnic University, Hong Kong, P. R. China.
Shuoguo
S
Yuan
Department of Applied Physics, The Hong Kong Polytechnic University, Hong Kong, P. R. China.
Yuda
Y
Zhao
Department of Applied Physics, The Hong Kong Polytechnic University, Hong Kong, P. R. China.
Zhibin
Z
Yang
Department of Applied Physics, The Hong Kong Polytechnic University, Hong Kong, P. R. China.
Sin Yuk
SY
Choi
Department of Applied Physics, The Hong Kong Polytechnic University, Hong Kong, P. R. China.
Yang
Y
Chai
Department of Applied Physics, The Hong Kong Polytechnic University, Hong Kong, P. R. China.
Siu Fung
SF
Yu
Department of Applied Physics, The Hong Kong Polytechnic University, Hong Kong, P. R. China.
Shu Ping
SP
Lau
Department of Applied Physics, The Hong Kong Polytechnic University, Hong Kong, P. R. China. jh.hao@polyu.edu.hk.
Jianhua
J
Hao
2D materials; photoluminescence; rare-earth ions; substitution doping; up-conversion