Cr3+活化的三元氧化物Mg3ZnNb2O9荧光粉具有高效的宽带近红外发光性能

IF 5.6 2区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Ceramics International Pub Date : 2025-09-01 DOI:10.1016/j.ceramint.2025.06.279

Lifang Yuan, Junzhong Wang, Zhijin Huang, Kaixiang Shen

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引用次数: 0

摘要

宽带近红外（NIR）磷转换发光二极管（pc- led）已经被公认为下一代光电应用的变革性技术，但其性能受到现有近红外荧光粉有限的发射波长，效率和热稳定性的阻碍。本文报道了一种具有宽带近红外发射特性的新型Cr3+活化的三元氧化Mg3ZnNb2O9荧光粉。优化后的mg3znnb2o9: 0.9% Cr3+样品的发射光谱跨度为700 ~ 1300 nm，峰位于870 nm，半峰全宽（FWHM）为184 nm，这主要是由于弱晶体场下允许自旋的4T2→4A2跃迁。该材料的内量子效率（IQE）为70.5%，发光热稳定性在373 K下保持42%的发射强度。证实了低黄-里斯因子（S = 2.46），说明了弱电子-声子耦合效应。使用优化的荧光粉制作的近红外pc-LED原型在200毫安时的输出功率为81毫瓦，可实现夜视应用。通过阐明结构-性能关系，为下一代智能近红外光源的新型近红外荧光粉的合理设计提供了理论依据。

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Cr3+-activated ternary oxide Mg3ZnNb2O9 phosphors showing efficient broadband near-infrared luminescence

Broadband near-infrared (NIR) phosphor-converted light-emitting diodes (pc-LEDs) have recognized a transformative technology for next-generation optoelectronic applications, yet their performance is hindered by the limited emission wavelength, efficiency, and thermal stability of existing NIR phosphors. This work reports on a novel Cr³⁺-activated ternary oxide Mg₃ZnNb₂O₉ phosphor with a broadband NIR emission. The optimized sample Mg₃ZnNb₂O₉:0.9 %Cr³⁺ showcase emission spectrum spanning 700–1300 nm with a peak at 870 nm and a full width at half maximum (FWHM) of 184 nm, attributed to the spin-allowed ⁴T₂→⁴A₂ transition under weak crystal field. The material demonstrates an internal quantum efficiency (IQE) of 70.5 % and luminescence thermal stability retaining 42 % emission intensity at 373 K. A low Huang-Rhys factor (S = 2.46) is confirmed, accounting for weak electron-phonon coupling effect. A prototype NIR pc-LED fabricated with the optimized phosphor achieves an output power of 81 mW at 200 mA, enabling night vision applications. By elucidating the structure-property relationship, this work advances the rational design of novel NIR phosphors for next-generation smart NIR light sources.

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来源期刊

Ceramics International 工程技术-材料科学：硅酸盐

CiteScore

9.40

自引率

15.40%

发文量

4558

审稿时长

25 days

期刊介绍： Ceramics International covers the science of advanced ceramic materials. The journal encourages contributions that demonstrate how an understanding of the basic chemical and physical phenomena may direct materials design and stimulate ideas for new or improved processing techniques, in order to obtain materials with desired structural features and properties. Ceramics International covers oxide and non-oxide ceramics, functional glasses, glass ceramics, amorphous inorganic non-metallic materials (and their combinations with metal and organic materials), in the form of particulates, dense or porous bodies, thin/thick films and laminated, graded and composite structures. Process related topics such as ceramic-ceramic joints or joining ceramics with dissimilar materials, as well as surface finishing and conditioning are also covered. Besides traditional processing techniques, manufacturing routes of interest include innovative procedures benefiting from externally applied stresses, electromagnetic fields and energetic beams, as well as top-down and self-assembly nanotechnology approaches. In addition, the journal welcomes submissions on bio-inspired and bio-enabled materials designs, experimentally validated multi scale modelling and simulation for materials design, and the use of the most advanced chemical and physical characterization techniques of structure, properties and behaviour. Technologically relevant low-dimensional systems are a particular focus of Ceramics International. These include 0, 1 and 2-D nanomaterials (also covering CNTs, graphene and related materials, and diamond-like carbons), their nanocomposites, as well as nano-hybrids and hierarchical multifunctional nanostructures that might integrate molecular, biological and electronic components.