An outlook of rare-earth activated persistent luminescence mechanisms

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• 作者：Shaochun HAN ((韩少春)) ; Yuhua WANG ((王育华)) ; Wei ZENG ((曾 巍)) ; Wenbo CHEN ((陈文波))
• 关键词：persistent luminescence ; rare earths ; phosphor ; aluminate
• 刊名：Journal of Rare Earths
• 出版年：2016
• 出版时间：March 2016
• 年：2016
• 卷：34
• 期：3
• 页码：245-250
• 全文大小：603 K

文摘

By studying energy transfer and persistent energy transfer properties in Eu, Mn co-doped calcium aluminate CaAl₂O₄, it was found that traditional persistent luminescence mechanisms had difficulty in explaining persistent energy transfer property between Eu²⁺ and Mn²⁺ 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.