Abstract
The luminescence properties of Eu3+ in La1-xEuxTa7O19 solid solution were examined systematically. In the structure the nearest neighbours of La3+ sites doped with Eu3+ ions are arranged two-dimensionally with proper separations of about 0.62 nm. An intense emission peak is observed at 610 nm together with supplementary weak peaks. All the peaks can be ascribed to 5Dj → 7Fj′ (j = 0,1; j′=0,1,2,3,4) transitions of Eu3+. The emission of the 5D0 → 7F2 transition becomes intense and saturates with the Eu3+ concentration. As a result, the profile of the concentration quenching implies that energy migration of excited Eu3+ hardly takes place in La1-xEuxTa7O19 solid solution.
Original language | English |
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Pages (from-to) | 44-47 |
Number of pages | 4 |
Journal | Journal of Alloys and Compounds |
Volume | 217 |
Issue number | 1 |
DOIs | |
Publication status | Published - 1995 Jan 15 |
Keywords
- Energy migration
- Luminescence
- Quenching
ASJC Scopus subject areas
- Mechanics of Materials
- Mechanical Engineering
- Metals and Alloys
- Materials Chemistry