Ultraviolet-A Persistent Luminescence of a Bi3+-Activated LiScGeO4 Material

Zhihao Zhou; Puxian Xiong; Huailu Liu; Mingying Peng

doi:10.1021/acs.inorgchem.0c02007

Ultraviolet-A Persistent Luminescence of a Bi³⁺-Activated LiScGeO₄ Material

Inorg Chem. 2020 Sep 8;59(17):12920-12927. doi: 10.1021/acs.inorgchem.0c02007. Epub 2020 Aug 21.

Authors

Zhihao Zhou¹, Puxian Xiong¹, Huailu Liu², Mingying Peng^{1

2}

Affiliations

¹ The China-Germany Research Center for Photonic Materials and Devices, The State Key Laboratory of Luminescent Materials and Devices, and Guangdong Provincial Key Laboratory of Fiber Laser Materials and Applied Techniques, The School of Materials Science and Engineering and The School of Physics, South China University of Technology, Guangzhou 510640, P. R. China.
² School of Applied Physics and Materials, Wuyi University, Jiangmen 529000, P. R. China.

PMID: 32822162
DOI: 10.1021/acs.inorgchem.0c02007

Abstract

Long persistent phosphors (LPPs) with ultraviolet (UV) luminescence have great potential for application in the fields of biomedicine, environmental, and catalysis. However, it is currently limited by the design and development of remarkable UV LPPs with a suitable spectral region and an ultralong afterglow decay time. Herein, we develop a new type of Bi³⁺-activated LiScGeO₄ LPP, which exhibits bright ultraviolet-A (UVA) persistent luminescence (PersL). Because of the existence of numerous stabilized effective traps, the as-synthesized phosphors can undergo an ultralong PersL decay time far longer than 12 h. The PersL properties, effective trap depths, distributions, and types, as well as the possible mechanism for the PersL behavior of LiScGeO₄:Bi³⁺, are comprehensively surveyed utilizing PersL excitation spectra, PersL decay analyses, thermoluminescence experiments, and X-ray photoelectron spectroscopy. This work can cover the shortage of LPPs in the UV region and also can lay the foundation for the development of more excellent UV LPPs toward versatile novel applications.