Chinese Optics Letters, Vol. 17, Issue 5, 051602 (2019)
Photoluminescence properties of Ca4La6(SiO4)4(PO4)2O2-based phosphors for wLEDs
Ju Cheng1,2, Jia Zhang1,*, Jian Lu2,**, Xintian Bian1, Hongchao Zhang2, Zhonghua Shen2, Xiaowu Ni2, Pengcheng Ma1, and Jin Shi1
- 1School of Physics and Electronic Electrical Engineering, Huaiyin Normal University, Huaian 223001, China
- 2School of Science, Nanjing University of Science and Technology, Nanjing 210094, China
The apatite compound Ca4La6(SiO4)4(PO4)2O2 (CLSPO) was explored as the host material for phosphors used in white light-emitting diodes (wLEDs). The crystal structure of the CLSPO host prepared by the solid-state reaction method was investigated with Rietveld refinement. The rare earth ions (Eu3+/ Tb3+/Ce3+, Tb3+/Tb3+, Mn2+) activated CLSPO phosphors were synthesized, and their photoluminescence properties, quantum yields, as well as thermal stabilities, were studied. Under near-ultraviolet excitations, the Eu3+ and Tb3+-doped CLSPO compounds exhibited red and green emissions with high luminescence efficiencies. Besides, tunable emissions from green to orange were obtained by introducing Mn2+ ions into the Tb3+-doped CLSPO samples. The results showed that the phosphors studied may have potential applications for wLEDs.
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