| Autor: |
Zhang, Zhijun, Delsing, Anneke C. A., Notten, Peter H. L., Zhao, Jingtai, Dorenbos, Pieter, Hintzen, Hubertus T. |
| Zdroj: |
ECS Journal of Solid State Science and Technology; January 2013, Vol. 2 Issue: 4 |
| Abstrakt: |
Mn2+-doped CaAlSiN3phosphors have been prepared by a solid-state reaction method at high temperature and the solubility of Mn2+in the host lattice as well as their photoluminescence properties were investigated. In CaAlSiN3, not only Ca2+sites, but also Al3+sites can be substituted by Mn2+ions. CaAlSiN3: Mn2+absorbs blue light in the spectral range of 440–460 nm, and exhibits a broad band emission in the wavelength range of 475–750 nm, which can be ascribed to the 4T1(4G) → 6A1(6S) transition of Mn2+located at two different sites in CaAlSiN3. The emission bands at lower energy (15,950 cm−1or 627 nm) and higher energy (18,250 cm−1or 548 nm) are assigned to the Mn2+locating at the Al site (MnAl) and Ca site (MnCa), respectively with energy transfer from MnCato MnAl. In addition, the integral luminescence intensity only decreases to about 94% at 150°C of the value at 50°C, which is of great interest for the applications of white-LEDs. |
| Databáze: |
Supplemental Index |
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