Issue 40, 2020
From the journal:

Journal of Materials Chemistry C

Cr3+-Free near-infrared persistent luminescence material LiGaO2:Fe3+: optical properties, afterglow mechanism and potential bioimaging†

Zhihao Zhou,a   Xiaodong Yi,b   Puxian Xiong,a   Xingyi Xu,a   Zhijun Maa  and  Mingying Peng ORCID logo *a  

* Corresponding authors

a 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
E-mail: pengmingying@scut.edu.cn

b CAS Key Laboratory of Design and Assembly of Functional Nanostructures, and Fujian Key Laboratory of Nanomaterials, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, P. R. China

Abstract

Near-infrared (NIR) persistent luminescence (PersL) materials have recently evoked considerable interest in the field of biomedicine, but the choices of efficient emitters for NIR PersL phosphors are rather limited. Herein, we report a new class of Fe3+-activated NIR PersL phosphor based on the LiGaO2 host, which exhibits an intense NIR PersL at around 748 nm and possesses an ultra-long PersL time of much longer than 26 h. The optical properties of this phosphor as well as the trapping and de-trapping processes, the trap characteristics, and the underlying PersL mechanism are comprehensively studied by means of photoluminescence (PL), PersL, electron paramagnetic resonance (EPR), thermoluminescence (TL), and X-ray photoelectron spectroscopies (XPS). It was found that the NIR PersL in this material is closely related to the oxygen vacancies. Furthermore, the penetration experiments and cytotoxicity tests of the biological tissue show that this material has great potential for bioimaging applications. Our achievement in the case of nontoxic Fe3+-activated LiGaO2 phosphors lays the foundation for the future design of Cr3+-free PersL phosphors with efficient NIR PersL towards versatile bioapplications.

Graphical abstract: Cr3+-Free near-infrared persistent luminescence material LiGaO2:Fe3+: optical properties, afterglow mechanism and potential bioimaging

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Article information

DOI
https://doi.org/10.1039/D0TC03212C
Article type
Paper
Submitted
07 Jul 2020
Accepted
18 Aug 2020
First published
09 Sep 2020

J. Mater. Chem. C, 2020,8, 14100-14108

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Cr3+-Free near-infrared persistent luminescence material LiGaO2:Fe3+: optical properties, afterglow mechanism and potential bioimaging

Z. Zhou, X. Yi, P. Xiong, X. Xu, Z. Ma and M. Peng, J. Mater. Chem. C, 2020, 8, 14100 DOI: 10.1039/D0TC03212C

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