First report of energy transfer from uranyl to Mn4+ in K3(UO2)F5:Mn4+

被引：3
|
作者：
Baur, Florian [1 ]
Jansen, Thomas [2 ]
Juestel, Thomas [1 ]
机构：
[1] Munster Univ Appl Sci, Dept Chem Engn, Stegerwaldstr 39, D-48565 Steinfurt, Germany
[2] LITEC LLL GmbH, Siemensallee 1, D-17489 Greifswald, Germany
来源：
JOURNAL OF LUMINESCENCE | 2021年 / 237卷
关键词：
Mn4+; Uranyl; Luminescence; Energy transfer; Fluoride; Red emission; Narrow band; (UO2)2+; RED PHOSPHOR; LUMINESCENCE PROPERTIES; ELECTRONIC-STRUCTURE; WHITE LEDS; NEAR-UV; IONS; BAND; BEHAVIOR;
D O I：
10.1016/j.jlumin.2021.118085
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
This work relates to the synthesis and optical characterization of a novel Mn4+ activated luminescent material with the composition K-3(UO2)F-5:Mn4+. This is the first report of a Mn4+ activated compound comprising the uranyl cation UO22+. A highly efficient energy transfer from uranyl to Mn4+ is observed, which enables the phosphor to be excited in a broad spectral range with a large absorption cross section. Simulated spectra show that the phosphor is suitable for use in full-conversion (In,Ga)N LEDs for high color rendering index/high luminous efficacy applications. The ratio between the emission of uranyl and Mn4+ exhibits a strong temperature dependence which is linked to an underlying phonon-assisted energy transfer.
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页数：6
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