Li doping effect on the photoluminescence behaviors of KSrPO{sub 4}:Dy{sup 3+} phosphors for WLED light
- School of Materials Science and Engineering, Key Laboratory of Applied Surface and Colloid Chemistry of Ministry of Education, Shaanxi Normal University, Xi’an 710119 (China)
- School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi’an 710119 (China)
Highlights: • The luminescence intensity of KSrPO{sub 4}:Dy{sup 3+} can be increased with Li{sup +} ions co-doping. • The mechanisms for the emitting enhancement with Li{sup +} ions co-doping were investigated. • The thermal stability demonstrated that KSrPO{sub 4}:0.01Dy{sup 3+}, 0.06Li{sup +} is suitable for WLEDs. • The chromaticity coordinates of KSrPO{sub 4}:Dy{sup 3+}, Li{sup +} can be tuned with Li{sup +} ions increasing. - Abstract: A novel warm-white phosphor KSrPO{sub 4} co-doped with Dy{sup 3+} and Li{sup +} ions was prepared by solid state reaction. A strategy of Li{sup +} doping was used with the aim of enhancing the luminescence of 475 nm and 570 nm emission bands under NUV excitation. Compared to lithium-free KSrPO{sub 4}:Dy{sup 3+}, the intensities of the 570 nm emission peaks were increased by 4.32 times and 2.84 times excited by 351 nm and 388 nm with 6 mol% Li{sup +} ions co-doping, respectively. The mechanism of the enhancement was discussed, that is due to the improvement of the phosphors’ crystallinity and charge compensation when the Li{sup +} ions were introduced. Furthermore, the thermal stability of KSrPO{sub 4}:0.01Dy{sup 3+}, 0.06Li{sup +} was measured and discussed, demonstrating it can be applied for high-powered LED. And the chromaticity coordinates of KSrPO{sub 4}:0.01Dy{sup 3+}, xLi{sup +} can be tuned efficiently from the cold-white region to warm-white region with Li{sup +} ions increasing, presenting its potential applied value as a new warm-white LED phosphor.
- OSTI ID:
- 22475742
- Journal Information:
- Materials Research Bulletin, Vol. 64; Other Information: Copyright (c) 2015 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA); ISSN 0025-5408
- Country of Publication:
- United States
- Language:
- English
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