Tunable single-phased white-emitting Sr3Y(PO4)3:Dy3+ phosphors for near-ultraviolet white light-emitting diodes |
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| Affiliation: | 1. Department of Physics, Pukyong National University, Busan 608-737, South Korea;2. Hybrid Interface Materials Global Frontier Research Group, Pusan National University, Busan 609-735, South Korea;3. 30 Gwahaksandan 1-ro 60 beon-gil, Gangseo-gu, Busan 46742, South Korea;1. School of Advanced Materials and Nano Technology, Xidian University, Xi’an 710071, China;2. Beijing Microelectronics Technology Institute, Beijing 100076, China;1. Department of Chemical Engineering, Chung Yuan Christian University, 32023, Taiwan;2. Department of Chemical Engineering, Army Academy, No.750, Longdong Rd., Chung-Li 320, Taiwan;3. Institute of Physics, Jan Dlugosz University, PL-42200 Czestochowa, Poland;4. Faculty of Physics, Ivan Franko National University of Lviv, 8 Kyrylo-and-Mefodii Str., UA-79005 Lviv, Ukraine;5. College of Sciences, Chongqing University of Posts and Telecommunications, Chongqing 400065, People''s Republic of China;6. Institute of Physics, University of Tartu, W. Ostwald Str. 1, Tartu 50411, Estonia |
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| Abstract: | Single-component white-emitting Sr3Y(PO4)3:Dy3+ phosphors were synthesized by a high-energy deformation process. X-ray diffraction patterns showed the resulting crystallized phase to be of cubic structure, space group I-43d (no. 220). The broad-band excitation spectra between 250 and 500 nm were observed by monitoring the emission wavelength at 576 nm, which matches well with commercial near-UV or blue LED chips. Under a 352 nm excitation, the emission peaks were observed at 483 nm (blue), 576 nm (yellow), and 666 nm (red), corresponding to the 4F9/2 → 6H15/2, 4F9/2 → 6H13/2, and 4F9/2 → 6H11/2 transitions of Dy3+ ions. The optimized doping concentration of Dy3+ ion was 8 mol%. By controlling the Dy3+ ion concentration, tunable colors from white to yellow were obtained in Sr3Y(PO4)3:Dy3+ phosphors. These results reveal that studied materials may be a promising candidate for white LED applications. |
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| Keywords: | Luminescence White LED Phosphors |
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