Photochromic and long persistent luminescence properties of Bi3+ doped SrGa4O7

IF 4.7 3区化学 Q2 CHEMISTRY, PHYSICAL

Journal of Photochemistry and Photobiology A-chemistry Pub Date : 2025-09-21 DOI:10.1016/j.jphotochem.2025.116800

Yaping Niu , Fugen Wu , Yifu Zhuo , Jie Li , Qi Zhang , Yun Teng , Xiaozhu Xie , Huafeng Dong , Zhongfei Mu

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引用次数: 0

Abstract

Materials with both photochromic properties (PC) and persistent luminescence (PersL) are increasingly being used in promising applications such as optical information storage and anti-counterfeiting. In this work, a novel afterglow material SrGa₄O₇(SGO): Bi³⁺synthesized by high-temperature solid-phase method was presented, and its photochromic and afterglow properties was investigated and analyzed. The SGO: 0.05Bi³⁺ phosphor transforms from white to light brown at 254 nm, and reverts from light brown to white at 450 nm. Yellow-green persistent luminescence can be observed for SGO: 0.05Bi³⁺ phosphor after 254 nm irradiation. The thermoluminescence (TL) spectrum shows two major traps within SGO: 0.05Bi³⁺ with depths of 0.786 and 1.016 eV. The trap located at the 0.786 eV energy level is considered to be the key contributor to the phosphor afterglow. Coexistence of PersL and PC properties in a single material provides new ideas for innovations in anti-counterfeiting, information encryption and optical data storage technologies.

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Bi3+掺杂SrGa4O7的光致变色和长持续发光特性

具有光致变色（PC）和持续发光（PersL）特性的材料越来越多地应用于光信息存储和防伪等有前景的应用中。本文采用高温固相法合成了一种新型余辉材料SrGa4O7(SGO): Bi3+，并对其光致变色和余辉性能进行了研究和分析。SGO: 0.05Bi3+荧光粉在254 nm处由白色变为浅棕色，在450 nm处由浅棕色还原为白色。SGO: 0.05Bi3+荧光粉经254 nm照射后可观察到黄绿色持续发光。热释光（TL）光谱显示了SGO内部的两个主要陷阱：0.05Bi3+，深度为0.786和1.016 eV。位于0.786 eV能级的陷阱被认为是产生荧光粉余辉的关键因素。在单一材料中同时具有PersL和PC特性，为防伪、信息加密和光学数据存储技术的创新提供了新的思路。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of Photochemistry and Photobiology A-chemistry 化学-物理化学

CiteScore

7.90

自引率

7.00%

发文量

580

审稿时长

48 days

期刊介绍： JPPA publishes the results of fundamental studies on all aspects of chemical phenomena induced by interactions between light and molecules/matter of all kinds. All systems capable of being described at the molecular or integrated multimolecular level are appropriate for the journal. This includes all molecular chemical species as well as biomolecular, supramolecular, polymer and other macromolecular systems, as well as solid state photochemistry. In addition, the journal publishes studies of semiconductor and other photoactive organic and inorganic materials, photocatalysis (organic, inorganic, supramolecular and superconductor). The scope includes condensed and gas phase photochemistry, as well as synchrotron radiation chemistry. A broad range of processes and techniques in photochemistry are covered such as light induced energy, electron and proton transfer; nonlinear photochemical behavior; mechanistic investigation of photochemical reactions and identification of the products of photochemical reactions; quantum yield determinations and measurements of rate constants for primary and secondary photochemical processes; steady-state and time-resolved emission, ultrafast spectroscopic methods, single molecule spectroscopy, time resolved X-ray diffraction, luminescence microscopy, and scattering spectroscopy applied to photochemistry. Papers in emerging and applied areas such as luminescent sensors, electroluminescence, solar energy conversion, atmospheric photochemistry, environmental remediation, and related photocatalytic chemistry are also welcome.