Afterglow Luminescence in Wet-Chemically Synthesized Inorganic Materials: Ultra-Long Room Temperature Phosphorescence Instead of Persistent Luminescence,The Journal of Physical Chemistry Letters

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Afterglow Luminescence in Wet-Chemically Synthesized Inorganic Materials: Ultra-Long Room Temperature Phosphorescence Instead of Persistent Luminescence
The Journal of Physical Chemistry Letters ( IF 4.8 ) Pub Date : 2017-09-18 00:00:00 , DOI: 10.1021/acs.jpclett.7b01702
Atul D. Sontakke ₁ , Alban Ferrier _{1,

2} , Pauline Burner _{3,

4} , Vinicius F. Guimarães _{3,

4} , Mathieu Salaün _{3,

4} , Vincent Maurel ₅ , Isabelle Gautier-Luneau _{3,

4} , Alain Ibanez _{3,

4} , Bruno Viana ₁

Affiliation

Wet-chemically synthesized amorphous yttrium–aluminum-borates (a-YAB) exhibit intense visible photoluminescence (PL). Preliminary investigations revealed a correlation of PL with the presence of carbon-related impurities; however, their exact nature is still under investigation. These powders also exhibit afterglow luminescence that lasts for several seconds at room-temperature (RT). A comparison with persistent phosphors and phosphorescent dye revealed that the afterglow in a-YAB is a phosphorescence phenomenon and not the persistence luminescence, which is more common in inorganic solids. The unusual RT phosphorescence in a-YAB could be achieved due to triplet-state stabilization of trapped luminescent organic moieties in glassy matrix. This is indeed an important step forward in understanding the complex luminescence mechanism in such promising wet-chemically synthesized functional materials. Moreover, phosphorescence is detectable for over 10 s at RT, suggesting rigid glassy inorganic matrix is more efficient in preserving phosphorescence at elevated temperatures, opening the path for several attractive applications including time-resolved bioimaging and thermometry.

中文翻译：

湿化学合成无机材料中的余辉发光：超长室温磷光而不是持久发光

湿化学合成的非晶态钇铝硼酸盐（a-YAB）表现出强烈的可见光致发光（PL）。初步调查显示PL与碳相关杂质的存在有关。但是，它们的确切性质仍在调查中。这些粉末还表现出余辉发光，这种余辉发光在室温（RT）下持续几秒钟。与持久性磷光体和磷光染料的比较表明，a-YAB中的余辉是磷光现象，而不是持久性发光，这在无机固体中更为常见。由于玻璃状基质中捕获的发光有机部分的三重态稳定，可以实现a-YAB中异常的RT磷光。这确实是了解这种有前途的湿化学合成功能材料中复杂发光机理的重要一步。此外，在室温下可检测到磷光超过10 s，这表明刚性玻璃态无机基质在高温下能更有效地保持磷光，这为包括时间分辨生物成像和测温在内的多种有吸引力的应用打开了道路。

更新日期：2017-09-18

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