Luminescence properties of Eu2+-activated NaCaBeSi2O6F for white light-emitting diode applications
- Department of Chemical Engineering, Chung Yuan Christian University, Chung Li, 32023, Taiwan (China)
- Guangdong Provincial Engineering Technology, Research Center for Optical Agriculture, South China Agriculture University, Guangzhou, 510642 (China)
- College of Sciences, Chongqing University of Posts and Telecommunications, Chongqing, 400065 (China)
Highlights: • A novel blue-emitting garnet NaCaBeSi{sub 2}O{sub 6}F:Eu{sup 2+} phosphor was synthesized. • The broad NUV excitation band (300–400 nm) gives blue emission. • The LED made with NaCaBeSi{sub 2}O{sub 6}F:Eu{sup 2+} and green and red-emitting phosphors gives white-light emission. - Abstract: A series of blue-emitting NaCaBeSi{sub 2}O{sub 6}F:Eu{sup 2+} phosphors were obtained via a solid state reaction. NaCaBeSi{sub 2}O{sub 6}F:Eu{sup 2+} exhibit a broad absorption from 250 to 450 nm when monitored at 467 nm and display a broad emission band from 400 to 600 nm when excited at 397 nm. The concentration quenching was obtained when the concentration of Eu{sup 2+} was increased to 0.8 mol%. Energy transfer interactions between Eu{sup 2+} in host is due to dipole-dipole mechanisms and the critical distance was calculated to be 31.96 Å. The results obtained in this study highly indicates that NaCaBeSi{sub 2}O{sub 6}F:Eu{sup 2+} can be a potential blue-emitting phosphor for light quality improvement in white-LED applications.
- OSTI ID:
- 22805114
- Journal Information:
- Materials Research Bulletin, Vol. 100; Other Information: Copyright (c) 2017 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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