UV-guided enhanced green luminescence in Y2O3/ZnO:Tb3+ composite via induced defect state and applied for latent fingerprinting application

IF 4.2 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Optical Materials Pub Date : 2025-09-02 DOI:10.1016/j.optmat.2025.117466

Prince Kumar , P.K. Vishwakarma , S.B. Rai , A. Bahadur

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Abstract

The Y₂O₃/ZnO:Tb³⁺ composite was synthesized through the solid-state reaction method. XRD analysis confirms the phase formation corresponding to JCPDS #36–1451 (ZnO) and #43–1036 (α-Y₂O₃), revealing nano order crystallinity, negative strain, and 76:24 % occupancy of Y₂O₃/ZnO. The submicron-sized particles subsequently increased upon Tb³⁺ doping as shown in FE-SEM images. Elemental mapping and XPS analyses confirm the composition, oxidation state, and presence of oxygen vacancies. The DRS spectra show that the band gaps of Y₂O₃ & ZnO are 5.28 eV and 3.27 eV, respectively. An intense green emission at 520 nm due to ZnO defect states and at 543 nm due to ⁵D₄→⁷F₅ transition was observed under λ_Ex = 378 and 305 nm, respectively. Interestingly, ZnO emits a broad band from 385 to 700 nm region through 378 or 340 nm excitations. The Tb³⁺ ion-induced tunability due to modification in defects, is well supported by decay analysis. The intense green and whitish green emission of Tb³⁺ ion and composite has been successfully applied in latent fingerprint detection.

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Y2O3/ZnO:Tb3+复合材料在诱导缺陷状态下的紫外引导增强绿色发光，并应用于潜在指纹识别

采用固相反应法制备了Y2O3/ZnO:Tb3+复合材料。XRD分析证实了JCPDS # 36-1451 （ZnO）和# 43-1036 （α-Y2O3）相的形成，揭示了纳米级结晶度、负应变和Y2O3/ZnO占比为76:24%。FE-SEM图像显示，Tb3+掺杂后，亚微米级颗粒增加。元素映射和XPS分析证实了其组成、氧化态和氧空位的存在。DRS光谱结果表明，Y2O3和ZnO的带隙分别为5.28 eV和3.27 eV。在λEx = 378和305 nm下，ZnO缺陷态和5D4→7F5跃迁分别在520 nm和543 nm处产生了强烈的绿色发光。有趣的是，ZnO在378或340 nm的激发下发射出385 ~ 700 nm的宽带。Tb3+离子引起的可调性是由缺陷的修饰引起的，衰变分析很好地支持了这一点。Tb3+离子及其复合材料的强绿色和白绿色发射已成功应用于潜在指纹检测。

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来源期刊

Optical Materials 工程技术-材料科学：综合

CiteScore

6.60

自引率

12.80%

发文量

1265

审稿时长

38 days

期刊介绍： Optical Materials has an open access mirror journal Optical Materials: X, sharing the same aims and scope, editorial team, submission system and rigorous peer review. The purpose of Optical Materials is to provide a means of communication and technology transfer between researchers who are interested in materials for potential device applications. The journal publishes original papers and review articles on the design, synthesis, characterisation and applications of optical materials. OPTICAL MATERIALS focuses on: • Optical Properties of Material Systems; • The Materials Aspects of Optical Phenomena; • The Materials Aspects of Devices and Applications. Authors can submit separate research elements describing their data to Data in Brief and methods to Methods X.