Abstract
Sm3+-activated NaSrPO4 phosphors could be efficiently excited at 403 nm, and exhibited a bright red emission mainly including four wavelength peaks of 565, 600, 646 and 710 nm. The highest emission intensity was found for NaSr 1−x PO4: xSm3+ with a composition of x = 0.007. Concentration quenching was observed as the composition of x exceeds 0.007. The decay time values of NaSr1−x PO 4 : xSm3+ phosphors range from around 2.55 to 3.49 ms. NaSr1−x PO4: xSm3+ phosphor shows a higher thermally stable luminescence and its thermal quenching temperature T 50 was found to be 350°C, which is higher than that of commercial YAG:Ce3+ phosphor and ZnS:(Al, Ag) phosphor. Because NaSr1−x PO4: xSm3+ phosphor features a high colour-rendering index and chemical stability, it is potentially useful as a new scintillation material for white light-emitting diodes.
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Acknowledgements
This study was funded by the Ministry of Science and Technology, Bureau of Energy, the Ministry of Economic Affairs and the Southern Taiwan Science Park Administration (STSPA), Taiwan, The Republic of China under contracts NSC 101-2628-E-020-002-MY3, nos. 102-E0603 and 102GE06. We would also like to thank the National Nano-Device Laboratories and the Precision Instrument Center of National Pingtung University of Science and Technology, for supplying experimental equipment.
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CHEN, KH., WENG, MH., YANG, RY. et al. New NaSrPO4:Sm3+ phosphor as orange-red emitting material. Bull Mater Sci 39, 1171–1176 (2016). https://doi.org/10.1007/s12034-016-1270-3
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DOI: https://doi.org/10.1007/s12034-016-1270-3