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.

引用

页数：6

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