White-light generation and energy transfer in SrZn{sub 2}(PO{sub 4}){sub 2}:Eu,Mn phosphor for ultraviolet light-emitting diodes
- Department of Applied Chemistry, National Chiao Tung University, Hsinchu 30050, Taiwan (China)
The SrZn{sub 2}(PO{sub 4}){sub 2}:Eu{sup 2+},Mn{sup 2+} phosphor shows two emission bands under ultraviolet radiation; the one observed at 416 nm is attributed to Eu{sup 2+} occupying the Sr{sup 2+} sites and the other asymmetric band deconvoluted into two peaks was found to center at 538 and 613 nm, which originate from Mn{sup 2+} occupying two different Zn{sup 2+} sites. The energy transfer from Eu{sup 2+} to Mn{sup 2+} has been demonstrated to be a resonant type via a dipole-quadrupole mechanism. By utilizing the principle of energy transfer and appropriate tuning of activator contents, we have demonstrated that SrZn{sub 2}(PO{sub 4}){sub 2}:Eu{sup 2+},Mn{sup 2+} is potentially useful as an ultraviolet-convertible phosphor for white-light emitting diodes.
- OSTI ID:
- 20778779
- Journal Information:
- Applied Physics Letters, Journal Name: Applied Physics Letters Journal Issue: 10 Vol. 88; ISSN APPLAB; ISSN 0003-6951
- Country of Publication:
- United States
- Language:
- English
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