Color-tunable emission and energy transfer investigation in Sr3Y(PO4)3:Ce3+,Tb3+phosphors for white LEDs.
A novel color-tunable phosphor Sr3Y(PO4)3:Ce3+,Tb3+was synthesized through solid-state reaction method. Several techniques, such as X-ray diffraction, Fourier transform infrared spectroscopy, scanning electron microscopy, and energy dispersive X-ray spectroscopy, were used to investigate the obtained phosphors. Results of luminescence spectra and decay time measurements revealed that an efficient energy transfer occurred from Ce3+to Tb3+via a dipole-dipole mechanism, where Ce3+exhibited a strong excitation band in the near-ultraviolet region. CIE chromaticity coordinates were tuned from deep blue (0.162, 0.090) to green (0.230, 0.411) by adjusting the relative concentrations between Ce3+and Tb3+ions. Results revealed that the as-synthesized phosphors had color-tunable characteristics and can be used as promising materials in the field of phosphor-converted white light-emitting diodes.
School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, China.
Anxiang
A
Guan
School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, China.
Peican
P
Chen
School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, China. Electronic address: zhouliyatf@163.com.
Liya
L
Zhou
School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, China.
Guofang
G
Wang
School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, China.
Xiaoshan
X
Zhang
School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, China.
Jingqi
J
Tang
Energy transfer; Luminescence; Solid-state reaction; Sr(3)Y(PO(4))(3)