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- Title
Ca<sub>9</sub>Sc(PO<sub>4</sub>)<sub>7</sub>:Ce<sup>3+</sup>,Mn<sup>2+</sup> - A Red-Emitting Phosphor Based on Energy Transfer.
- Authors
Li, Hai‐Feng; Jia, Yong‐Lei; Ma, Teng‐Fei; Pang, Ran; Sun, Wen‐Zhi; Li, Da; Fu, Ji‐Peng; Zhang, Su; Jiang, Li‐Hong; Li, Cheng‐Yu
- Abstract
A series of novel color-tunable phosphors, Ca9Sc(PO4)7: xCe3+, yMn2+ (CSP: xCe3+, yMn2+), have been synthesized by traditional high-temperature solid-state reactions. The optical properties of CSP: xCe3+ and CSP:0.02Ce3+, yMn2+ were systematically investigated with various spectral technologies. A phosphor with a broad, deep-red emission, CSP:0.02Ce3+,0.1Mn2+, was prepared by an energy transfer process with the CIE chromaticity coordinates (0.669, 0.307). CSP:Ce3+,Mn2+ phosphors excited at 254 nm display two broad emission bands: one centered at around 360 nm is assigned to the 5d1-4f1 electronic transition of Ce3+ ions, and the other at about 650 nm is attributed to the 4T1 (4G) → 6A1 (6S) transition of Mn2+ ions. The energy transfer mechanism from Ce3+ to Mn2+ in the CSP:Ce3+,Mn2+ samples was discovered to be the dipole-dipole interaction, which was confirmed by the estimated critical distance between Ce3+ and Mn2+ (13.0 Å) by the spectral overlap method. Furthermore, the higher thermal stability of CSP:Ce3+,Mn2+ makes it feasible for a potential application in white-light-emitting diodes (WLEDs).
- Subjects
CALCIUM compounds; PHOSPHORS; ENERGY transfer; SOLID state chemistry; HIGH temperature chemistry
- Publication
European Journal of Inorganic Chemistry, 2016, Vol 2016, Issue 6, p867
- ISSN
1434-1948
- Publication type
Article
- DOI
10.1002/ejic.201501099