TY  - JOUR
ID  - SisLab3809
UR  - https://eprints.uet.vnu.edu.vn/eprints/id/eprint/3809/
IS  - 4
A1  - Nguyen, Thi Dung
A1  - Hoang, Van Thanh
A1  - Nguyen, Dinh Lam
Y1  - 2019///
N2  - NaYF4:(Yb,Tm) upconversion materials  were synthesized by the simple hydrothermal method. Growth duration was varied from 4h to 12h under a growth temperature of 150oC. The structural, optical and surface morphology characteristics of the NaYF4:(Yb,Tm) UC materials were investigated. The XRD and SEM results illustrated that the NaYF4:(Yb,Tm) materials were transformed from the multiple phases (hexagonal and cubic) to the single-phase (hexagonal prism) as growth duration being longer than 8h with the average diameter and length of these prisms being about 0.5 µm and 2 µm, respectively. Under 980 nm laser excitation, the NaYF4:(Yb,Tm) emits at peaks of 450 nm (1D2? 3F4), 475 nm (1G4?3H6), 647 nm (1G4?3F4) and 697  nm (3F3?3H6), with the highest emission belonging to NaYF4:(Yb,Tm) grown for 8h.
PB  - VNU Journal of Science: Natural Science and Technology
JF  - Influences of growth durations on characteristics of NaYF4:(Yb,Tm) upconversion materials
VL  - 35
SN  - 0866-8612
TI  - Influences of growth durations on characteristics of NaYF4:(Yb,Tm) upconversion materials
AV  - public
ER  -