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• Photonics Research
• Vol. 10, Issue 2, 02000381 (2022)
Panpan Li, Youjie Hua, Renguang Ye, Muzhi Cai, Shiqing Xu, and Junjie Zhang*
Author Affiliations
• Key Laboratory of Rare Earth Optoelectronic Materials and Devices of Zhejiang Province, Institute of Optoelectronic Materials and Devices, China Jiliang University, Hangzhou 310018, China
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Abstract

As a leader of long persistent luminescence (LPL) materials, the optical properties of aluminate phosphor have remained unsurpassed for many years. As a powder material, its practical application will always be limited to the field of security signs. In this paper, the $SrAl2O4:Eu2+$, $Dy3+$ inorganic solid material with comparable LPL properties to powder materials was obtained. The crystallization mechanism and crystallite micro-morphology of inorganic glass materials have been studied, and a new opinion is put forward that the large-size $SrAl2O4$ crystallites in the glass matrix are stacked by rod-shaped crystals arranged in a regular direction. In addition, the $SrAl2O4:Eu2+$, $Dy3+$ glass obtained cannot only collect high-energy photons but also is sensitive to low-energy sunlight. The results show that the material exhibits superior performance in LPL, thermoluminescence, and photostimulable luminescence. Based on this property, a new application of this material in the field of information storage was explored. This paper has a certain reference value for the development and application of aluminate LPL materials in the field of smart optical information storage.

1. INTRODUCTION

The transformation of information storage has brought people into the rapidly growing “era of digital information explosion,” which has stimulated updating secure storage media and various storage methods [1]. At present, optical data storage has become the new generation of information storage stars because of its advantages of high efficiency, energy conservation, environmental protection, privacy, repeatable writing, and reading [26].