An outlook of rare-earth activated persistent luminescence mechanisms
By studying energy transfer and persistent energy transfer properties in Eu, Mn co-doped calcium aluminate CaAl_2O_4, it was found that traditional persistent luminescence mechanisms had difficulty in explaining persistent energy transfer property between Eu~（2＋） and Mn~（2＋） ions. Based on this ques...
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| Published in: | Journal of rare earths Vol. 34; no. 3; pp. 245 - 250 |
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| Main Author: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
Elsevier B.V
01-03-2016
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| Subjects: | |
| Online Access: | Get full text |
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| Summary: | By studying energy transfer and persistent energy transfer properties in Eu, Mn co-doped calcium aluminate CaAl_2O_4, it was found that traditional persistent luminescence mechanisms had difficulty in explaining persistent energy transfer property between Eu~（2＋） and Mn~（2＋） ions. Based on this question, a mechanism was suggested in which vibrational energy levels were considered as a Morse potential, and trap centers were distinguished into barriers and wells. Then, this phenomenon was explained by allowing energy transfer and persistent energy transfer could have different preference to different vibrational energy levels. Properties of trap centers were also discussed by using the concept of Madelung energy. |
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| Bibliography: | 11-2788/TF persistent luminescence; rare earths; phosphor; aluminate HAN Shaochtm , WANG Yuhua , ZENG Wei , CHEN Wenbo （Key Laboratory for Special Function Materials and Structure Design of the Ministry of Education, School of Physical Science and Technology, Lanzhou University, Lanzhou 730000, China） By studying energy transfer and persistent energy transfer properties in Eu, Mn co-doped calcium aluminate CaAl_2O_4, it was found that traditional persistent luminescence mechanisms had difficulty in explaining persistent energy transfer property between Eu~（2＋） and Mn~（2＋） ions. Based on this question, a mechanism was suggested in which vibrational energy levels were considered as a Morse potential, and trap centers were distinguished into barriers and wells. Then, this phenomenon was explained by allowing energy transfer and persistent energy transfer could have different preference to different vibrational energy levels. Properties of trap centers were also discussed by using the concept of Madelung energy. |
| ISSN: | 1002-0721 2509-4963 |
| DOI: | 10.1016/S1002-0721(16)60021-2 |