Journal
JOURNAL OF LUMINESCENCE
Volume 206, Issue -, Pages 645-648Publisher
ELSEVIER
DOI: 10.1016/j.jlumin.2018.10.043
Keywords
Phosphors; Luminescence property; Apatite; w-LEDs; Energy transfer
Categories
Funding
- National Natural Science Foundation of China [51672257, 51872269]
- Fundamental Research Funds for the Central Universities [2652017347, 2652017335]
- State Scholarship Fund of China Scholarship Council (CSC)
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A series of reddish-emitting apatite-type phosphor LiGd9(SiO4)(6)O-2:Sm3+ was prepared by using an appropriate solid-state method. The photoluminescence (PL), photoluminescence excitation (PLE) spectra, and decay times of the samples were characterized to investigate the photoluminescence properties for application in white light-emitting diodes (w-LEDs). The photoluminescence investigations showed that LiGd9(SiO4)(6)O-2:Sm3+ phosphor emitted reddish emission, which ascribed to the transitions of the Sm3+ from the (4)G(5/2) excited state to the H-6(5/2), H-6(7/2), and H-6(9/2) states, respectively. The critical quenching concentration of Sm3+ in LiGd9(SiO4)(6)O-2 phosphors were determined to be about 3 mol%. Moreover, the spectroscopic data and fluorescence decay dynamics indicate that the energy transfer from Gd3+ to Sm3+ ions takes place in LiGd9(SiO4)(6)O-2:Sm3+ phosphor. All the results indicated that the LiGd9(SiO4)(6)O-2:Sm3+ phosphor could efficiently assimilate the near ultraviolet (n-UV) light and act as a suitable warm light candidate for n-UV w-LEDs.
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