Luminescent properties and energy transfer of color-tunable Sr3Y2(SiO3)(6):Ce3+,Tb3+ phosphors
writer：Li, NX (Li Naixu)[ 1 ] ; Li, SQ (Li Shuqiang)[ 1 ] ; Wang, YM (Wang Yueming)[ 1 ] ; Zhou, BY (Zhou B
keywords：SOL-GEL SYNTHESIS; PHOTOLUMINESCENT PROPERTIES; TB3+; EU; CE; TRANSITION; FACILE; SMART; SM3+; RE
source：期刊
specific source：JOURNAL OF RARE EARTHS
Issue time：2014年
Phosphors with controlled emission spectra are of great interest due to their application for white light emitting diodes. Herein, a new class of Sr3Y2(SiO3)(6):Ce3+,Tb3+ phosphors were synthesized by a facile sol-gel combustion method. The phase structure, morphology, and luminescence properties of the phosphors were characterized by using powder X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), and photoluminescence excitationand emission spectra, respectively. The results onluminescence properties indicated that co-doped Ce3+ ions served as UV-light sensitizers with excitation energy partially transferred to Tb3+ ions, leading to green emission from Tb3+. Particularly, the corresponding emitting colors of the phosphors could be well-tuned from deep blue (0.16, 0.05) to green region (0.25, 0.45) by adjusting the molar ratio of Ce3+/Tb3+.