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用于白光发光二极管应用的具有高量子效率和优异色纯度的新型铕掺杂铌酸钠钡镧磷光体的结构和发光特性

Structural and luminescence properties of novel Eu-doped NaBaLaNbO phosphors with high quantum efficiency and excellent color purity for w-LED applications.

作者信息

Poria Kanishk, Bhatia Sanjana, Kashyap Rajiv, Kashyap Vikas, Sihmar Isha, Deopa Nisha, Shahi Jangvir Singh

机构信息

Department of Physics, Panjab University Chandigarh India

School of Engineering, Chemical Engineering, University of Hull Hull UK.

出版信息

RSC Adv. 2024 Sep 18;14(40):29490-29504. doi: 10.1039/d4ra05026f. eCollection 2024 Sep 12.

DOI:10.1039/d4ra05026f
PMID:39297041
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC11409444/
Abstract

In this study, we report the successful synthesis and thorough characterization of Eu-doped NaBaLaNbO phosphors, targeting their application in white-light-emitting diodes (w-LEDs). The phosphors were synthesized using a high-temperature solid-state method, ensuring robust incorporation of Eu ions into the host lattice. Comprehensive analyses were performed, including X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), energy-dispersive X-ray (EDX) spectroscopy, Fourier transform infrared (FT-IR) spectroscopy and Raman spectroscopy, confirming the phase purity, crystallinity, morphology, and elemental composition of the phosphors. We have also studied the electronic structure using diffuse reflectance spectroscopy (DRS). Photoluminescence studies revealed strong red emissions under near-ultraviolet light excitation, with the optimal Eu doping concentration identified to be 9 mol%. Quantum-yield measurements demonstrated high luminescence efficiency, while chromaticity coordinates indicated excellent color purity suitable for w-LED applications. These findings contribute significantly to the advancement of phosphor materials for solid-state lighting, suggesting promising prospects for their integration into commercial LED devices.

摘要

在本研究中，我们报告了Eu掺杂的NaBaLaNbO荧光粉的成功合成及全面表征，目标是将其应用于白光发光二极管（w-LED）。采用高温固态法合成荧光粉，确保Eu离子牢固地掺入主体晶格。进行了全面分析，包括X射线衍射（XRD）、场发射扫描电子显微镜（FESEM）、能量色散X射线（EDX）光谱、傅里叶变换红外（FT-IR）光谱和拉曼光谱，证实了荧光粉的相纯度、结晶度、形态和元素组成。我们还使用漫反射光谱（DRS）研究了电子结构。光致发光研究表明，在近紫外光激发下有强烈的红色发射，确定最佳Eu掺杂浓度为9 mol%。量子产率测量显示出高发光效率，而色度坐标表明其具有适合w-LED应用的优异色纯度。这些发现对固态照明荧光粉材料的发展有重大贡献，表明它们集成到商用LED器件中有广阔前景。

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