Strontium Aluminate Persistent Luminescent Single Crystals: Linear Scaling of Emission Intensity with Size Is Affected by Reabsorption
The green-emitting SrAl2O4:Eu,Dy phosphor is the most widely used and well-studied persistent luminescent phosphor available today. Recent efforts to boost its performance in terms of luminescence intensity and duration are challenged by complex loss mechanisms, including the optically stimulated re...
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| Veröffentlicht in: | The journal of physical chemistry letters 2023-11, Vol.14 (45), p.10151-10157 |
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| container_issue | 45 |
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| container_title | The journal of physical chemistry letters |
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| creator | Van der Heggen, David Joos, Jonas J. Rytz, Daniel Viana, Bruno Smet, Philippe F. |
| description | The green-emitting SrAl2O4:Eu,Dy phosphor is the most widely used and well-studied persistent luminescent phosphor available today. Recent efforts to boost its performance in terms of luminescence intensity and duration are challenged by complex loss mechanisms, including the optically stimulated release of previously trapped charges by excitation light. Here, we present minimally scattering SrAl2O4:Eu,Dy single crystals, which, as opposed to powder phosphors, allow to profit from a so-called volume effect, resulting in a significantly increased emission intensity. Additionally, they allow for the identification of the reabsorption of the afterglow emission by trapped charges as an important loss mechanism, leading to a nonlinear scaling of the emission intensity with the crystal size. If circumvented, the emission intensity could be further increased, in persistent luminescent powders, ceramics, and single crystals. |
| doi_str_mv | 10.1021/acs.jpclett.3c02638 |
| format | Article |
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| source | American Chemical Society Journals |
| subjects | Chemical Sciences Physical Insights into Light Interacting with Matter Physics |
| title | Strontium Aluminate Persistent Luminescent Single Crystals: Linear Scaling of Emission Intensity with Size Is Affected by Reabsorption |
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