Luminescence of garnet-structure NaLu2Ga3Ge2O12: Tb3+ green long afterglow phosphor for latent fingerprints and information encryption applications

IF 9.6 1区化学 Q1 CHEMISTRY, APPLIED

Journal of Rare Earths Pub Date : 2026-10-01 Epub Date: 2026-01-05 DOI:10.1016/j.jre.2026.01.001

Jiahui Zhang, Junhao Li, Linyun Zeng, Chunli Li, Wenjing Huang, Ziying Hong, Wenjia Xie, Liya Zhou, Mubiao Xie, Haiyong Ni, Xinguo Zhang

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引用次数: 0

Abstract

In this work, a new garnet-type NaLu₂Ga₃Ge₂O₁₂: Tb³⁺ phosphor was successfully prepared by solid-state reaction, which exhibits strong green emission at 543 nm under 272 nm ultraviolet excitation with long-lasting afterglow (>1200 s). Thermoluminescence (TL) curves reveal the existence of trap level with depth (0.367 eV), which plays a crucial role in charge carrier storage and release. The appropriate trap depth results in the long afterglow luminescence of NaLu₂Ga₃Ge₂O₁₂: Tb³⁺. This green phosphor can realize level I–III latent fingerprints on various substrates with high contrast and resolution. Mixing NaLu₂Ga₃Ge₂O₁₂: Tb³⁺ with commercial Y₂O₃: Eu³⁺ red phosphor, the information encryption is achieved, which displays different fluorescent information under sunlight, UV light and in the dark. This study provides a potential long afterglow green phosphor, which has good application prospects in the fields of latent fingerprints and information encryption.

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石榴石结构NaLu2Ga3Ge2O12: Tb3+绿色长余辉荧光粉在潜在指纹和信息加密中的发光研究

本文通过固相反应成功制备了一种新的石榴石型NaLu2Ga3Ge2O12: Tb3+荧光粉，在272 nm紫外光激发下，在543 nm处表现出强的绿色发光，余辉持续时间为1200 s。热释光（TL）曲线显示存在深度为0.367 eV的陷阱能级，该陷阱能级在载流子的储存和释放中起着至关重要的作用。适当的陷阱深度可以使NaLu2Ga3Ge2O12: Tb3+产生较长的余辉发光。该绿色荧光粉具有高对比度和高分辨率，可在各种基材上实现I-III级潜在指纹。将NaLu2Ga3Ge2O12: Tb3+与商用Y2O3: Eu3+红色荧光粉混合，实现了信息加密，在日光、紫外光和黑暗中显示出不同的荧光信息。该研究提供了一种潜在的长余辉绿色荧光粉，在潜在指纹和信息加密领域具有良好的应用前景。

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 Rare Earths 化学-应用化学

CiteScore

8.70

自引率

14.30%

发文量

374

审稿时长

1.7 months

期刊介绍： The Journal of Rare Earths reports studies on the 17 rare earth elements. It is a unique English-language learned journal that publishes works on various aspects of basic theory and applied science in the field of rare earths (RE). The journal accepts original high-quality original research papers and review articles with inventive content, and complete experimental data. It represents high academic standards and new progress in the RE field. Due to the advantage of abundant RE resources of China, the research on RE develops very actively, and papers on the latest progress in this field emerge every year. It is not only an important resource in which technicians publish and obtain their latest research results on RE, but also an important way of reflecting the updated progress in RE research field. The Journal of Rare Earths covers all research and application of RE rare earths including spectroscopy, luminescence and phosphors, rare earth catalysis, magnetism and magnetic materials, advanced rare earth materials, RE chemistry & hydrometallurgy, RE metallography & pyrometallurgy, RE new materials, RE solid state physics & solid state chemistry, rare earth applications, RE analysis & test, RE geology & ore dressing, etc.