新型Eu3+掺红色荧光粉，具有零浓度猝灭效应，用于wled和潜在指纹检测

IF 4.7 3区化学 Q2 CHEMISTRY, PHYSICAL

Journal of Photochemistry and Photobiology A-chemistry Pub Date : 2025-09-13 DOI:10.1016/j.jphotochem.2025.116750

Chao Wei , Jie Zhang , Jingyu Ran

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引用次数: 0

摘要

高效的红色荧光粉可以显著提高磷转换白光发光二极管（pc- led）的性能。本研究采用常规固相法合成了Sr9La2(WO6)4: xEu3+红色荧光粉，并对其进行了系统表征。结果表明，Eu3+活化的Sr9La2(WO6)4荧光粉能有效吸收近紫外和蓝光，并发射出强红光，与商用激发芯片一致。浓度依赖性光致发光（PL）表明，该荧光粉没有浓度猝灭，与商业红色荧光粉和先前报道的Eu3+荧光粉相比，具有优越的发射性能。将合成的荧光粉封装在商用荧光粉中以制造白光LED器件。光学测试表明，该器件具有较高的显色指数（Ra = 93.495）和良好的相关色温（CCT = 4423）。红外热成像表明该LED器件具有良好的热稳定性和散热性能。此外，Sr9La2(WO6)4: xEu3+荧光粉制备的荧光LFP图像具有优异的可视化效果，可以清晰地显示不同表面上不同层次指纹的特征。研究表明，Sr9La2(WO6)4: xEu3+红色荧光粉在固态照明和LFP检测领域具有很大的应用潜力。

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Novel Eu3+ doped red phosphor with zero concentration quenching effect for WLEDs and latent fingerprint detection

Efficient red phosphors can significantly enhance the performance of phosphor-converted white light-emitting diodes (pc-LEDs). In this study, Sr₉La₂(WO₆)₄: xEu³⁺ red phosphors with no observable concentration quenching were synthesized via the conventional solid-state method and systematically characterized. The results indicate that the Eu³⁺-activated Sr₉La₂(WO₆)₄ phosphors can effectively absorb near-ultraviolet and blue light and emit strong red light, which is consistent with commercial excitation chips. Concentration-dependent photoluminescence (PL) shows that the phosphor exhibits no concentration quenching, suggesting superior emission properties compared to commercial red phosphors and previously reported Eu³⁺ phosphors. The synthesized phosphors were encapsulated with commercial phosphors to fabricate white LED devices. Optical testing revealed that the LED devices exhibited a high color rendering index (Ra = 93.495) and excellent correlated color temperature (CCT = 4423). Infrared thermal imaging demonstrated good thermal stability and heat dissipation performance of the LED device. In addition, the fluorescent LFP image prepared by Sr₉La₂(WO₆)₄: xEu³⁺ phosphor has excellent visualization effect, and can clearly display the characteristics of different levels of fingerprints on different surfaces. The research shows that Sr₉La₂(WO₆)₄: xEu³⁺ red phosphor has great application potential in the field of solid state lighting and LFP detection.

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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.