Issue 38, 2022

Enabling narrowband cyan photoluminescence and long-lasting ultraviolet-A persistent luminescence in Bi3+ single-doped Sr3Sc2Ge3O12 phosphors by selective site occupation

Abstract

Trivalent bismuth (Bi3+) has been regarded as a favorable emitting center since it can give off light of different wavelengths from ultraviolet (UV) to red in different host materials. These Bi3+ single-doped phosphors have been of great interest for applications in white light-emitting diodes (LEDs), optical information storage and anti-counterfeiting. However, it still remains a challenge to achieve multimodal luminescence in Bi3+ activated single-component inorganic luminescent materials for multifunctional applications. Here, Bi3+ single-doped Sr3Sc2Ge3O12 phosphors with dual-mode luminescence, emitting narrowband cyan photoluminescence and long-lasting ultraviolet-A (UVA) persistent luminescence, are reported for the first time by selective site occupation of a Bi3+ emitter. Intense cyan photoluminescence peaking at 487 nm when excited at 386 nm is assigned to the Bi3+ in the Sr2+ site, which shows very good luminescence thermal stability. Moreover, after UV excitation at 254 nm or under sunlight irradiation, UVA persistent luminescence with a peak maximum at 333 nm and a long persistence time of more than 12 h is achieved, which can be attributed to the Bi3+ in the Sc3+ site. The dual-mode luminescence in a Bi3+ single-doped Sr3Sc2Ge3O12 garnet not only provides a directional solution for constructing warm white LEDs, but also holds great promise for optical information write-in and read-out applications.

Graphical abstract: Enabling narrowband cyan photoluminescence and long-lasting ultraviolet-A persistent luminescence in Bi3+ single-doped Sr3Sc2Ge3O12 phosphors by selective site occupation

Supplementary files

Article information

Article type
Paper
Submitted
10 Jul 2022
Accepted
22 Aug 2022
First published
22 Aug 2022

J. Mater. Chem. C, 2022,10, 14211-14219

Enabling narrowband cyan photoluminescence and long-lasting ultraviolet-A persistent luminescence in Bi3+ single-doped Sr3Sc2Ge3O12 phosphors by selective site occupation

S. Miao, Y. Liang, D. Chen, S. Yan, J. Liu, W. Wang and J. Bi, J. Mater. Chem. C, 2022, 10, 14211 DOI: 10.1039/D2TC02898K

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