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Unraveling the Mechanisms of Thermal Quenching of Luminescence in Ce3+-Doped Garnet Phosphors†
Chemistry of Materials ( IF 7.2 ) Pub Date : 2019-04-02 00:00:00 , DOI: 10.1021/acs.chemmater.8b05300 Yuan-Chih Lin 1 , Marco Bettinelli 2 , Maths Karlsson 1
Chemistry of Materials ( IF 7.2 ) Pub Date : 2019-04-02 00:00:00 , DOI: 10.1021/acs.chemmater.8b05300 Yuan-Chih Lin 1 , Marco Bettinelli 2 , Maths Karlsson 1
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The environmental and economic benefits of phosphor-converted white-light-emitting diodes (pc-WLEDs) have been increasingly appreciated in recent years. However, a significant challenge in this field pertains to a phenomenon known as thermal quenching, which takes place inside phosphors and leads to a pronounced reduction of the emission intensity under high-power light-emitting diode operation. The development of new, more thermally stable phosphors depends on a better understanding of the mechanisms underpinning thermal quenching in phosphors. Here we review the current understanding of thermal quenching mechanisms in Ce3+-doped garnet phosphors, which are widely considered one of the most important families of phosphors for application in pc-WLEDs. In particular, we highlight key structural and dynamical properties, such as the coordination environment of the Ce3+ ions, phonons and local vibrational modes, and structural and chemical defects, which are shown to correlate with phosphor performance. We also discuss the perspectives for future studies in this field in hopes of accelerating the development of new efficient phosphors featuring suppressed thermal quenching of luminescence.
中文翻译：
阐明Ce 3+掺杂石榴石荧光粉的发光热猝灭机理†
近年来，磷光转换白光发光二极管（pc-WLED）的环境和经济利益已日益受到人们的重视。然而，该领域中的重大挑战涉及被称为热淬灭的现象，该现象发生在磷光体内部，并导致大功率发光二极管工作时发射强度的显着降低。新的，热稳定性更强的荧光粉的开发取决于对荧光粉热淬灭机理的更好理解。在这里，我们回顾了当前对Ce 3+中热淬火机理的理解。掺杂的石榴石荧光粉，被广泛认为是应用于pc-WLED的最重要的荧光粉系列之一。特别是，我们重点介绍了关键的结构和动力学特性，例如Ce 3+离子的配位环境，声子和局部振动模式以及结构和化学缺陷，这些都与荧光粉的性能相关。我们还讨论了该领域未来研究的前景，以期加快开发具有抑制的发光热猝灭特性的新型高效荧光粉。
更新日期：2019-04-02
中文翻译：
阐明Ce 3+掺杂石榴石荧光粉的发光热猝灭机理†
近年来，磷光转换白光发光二极管（pc-WLED）的环境和经济利益已日益受到人们的重视。然而，该领域中的重大挑战涉及被称为热淬灭的现象，该现象发生在磷光体内部，并导致大功率发光二极管工作时发射强度的显着降低。新的，热稳定性更强的荧光粉的开发取决于对荧光粉热淬灭机理的更好理解。在这里，我们回顾了当前对Ce 3+中热淬火机理的理解。掺杂的石榴石荧光粉，被广泛认为是应用于pc-WLED的最重要的荧光粉系列之一。特别是，我们重点介绍了关键的结构和动力学特性，例如Ce 3+离子的配位环境，声子和局部振动模式以及结构和化学缺陷，这些都与荧光粉的性能相关。我们还讨论了该领域未来研究的前景，以期加快开发具有抑制的发光热猝灭特性的新型高效荧光粉。
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