Issue 41, 2022

Up-conversion charging of a Tb3+-activated garnet phosphor

Abstract

Studies on the up-conversion charging of persistent phosphors are of great academic and practical significance. To date, up-conversion charging designs have been achieved in Cr3+, Mn2+ and Pr3+-activated phosphors. We herein report, for the first time, an up-conversion charging process in the Tb3+-activated garnet phosphor, Gd3Ga5O12:Tb3+, using a 488 nm laser as the excitation source. The delocalized 4f75d state of Tb3+ is excited by absorbing two excitation photons, followed by the charging of the phosphor. Moreover, spectroscopic investigations reveal that an energy-transfer mechanism dominates the up-conversion excitation. This work provides an up-conversion strategy for charging Tb3+-activated phosphors, paving the way toward expanding the scope of persistent phosphors with up-conversion chargeability.

Graphical abstract: Up-conversion charging of a Tb3+-activated garnet phosphor

Supplementary files

Article information

Article type
Paper
Submitted
11 aug 2022
Accepted
20 sep 2022
First published
21 sep 2022

J. Mater. Chem. C, 2022,10, 15353-15357

Up-conversion charging of a Tb3+-activated garnet phosphor

T. Shi, F. Liu, J. Zhang and X. Wang, J. Mater. Chem. C, 2022, 10, 15353 DOI: 10.1039/D2TC03380A

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