Enhanced near-infrared luminescence and thermal stability in Cr3+-Activated Y2CaAl4SiO12 phosphors: Towards high-performance NIR light sources

IF 5.1 2区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Ceramics International Pub Date : 2025-04-01 DOI:10.1016/j.ceramint.2025.01.085

Dejian Hou , Rui Huang , Jianhong Dong , Wenxing Zhang , Yi Zhang , Xueyao Li , Yiran Zhu , Zhenxu Lin , Huihong Lin , Lei Zhou

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Abstract

Cr³⁺ activated broadband near-infrared (NIR) phosphors exhibit tremendous potential for the phosphor-converted light-emitting diodes (pc-LEDs). Unfortunately, they still suffer from drawbacks such as low efficiency, and poor thermal stability. Herein, we have successfully developed a series of broadband NIR-emitting phosphors Y₂CaAl₄SiO₁₂:Cr³⁺ with good luminescence performance. Under 435 nm light excitation, the Y₂CaAl₄SiO₁₂:0.05Cr³⁺ phosphor shows broadband NIR emission in the 700–1100 nm range with a full width at half maximum (FWHM) of 159 nm. The significant impacts of Cr³⁺ doping concentration, fluxing agent, sintering atmosphere and host lattice composition were demonstrated in detail, some effective strategies which can enhance the luminescence performance of Cr³⁺ were successfully acquired. More excitingly, the optimized phosphor possesses outstanding thermal stability and satisfactory internal quantum efficiency of 96 %, the emission intensity can maintain as high as 89.8 % at 423 K of that at room temperature, surpassing most of reported Cr³⁺-doped NIR phosphors. The promising applications in night vision and biological tissue penetration were successfully validated for the NIR phosphor. The findings and simple strategies proposed in this research may pave a way for the development of high-quality broadband NIR emitting phosphors.

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Cr3+活化Y2CaAl4SiO12荧光粉增强近红外发光和热稳定性：迈向高性能近红外光源

Cr3+激活的宽带近红外（NIR）荧光粉在磷转换发光二极管（pc- led）中显示出巨大的潜力。不幸的是，它们仍然存在效率低、热稳定性差等缺点。在此，我们成功开发了一系列具有良好发光性能的宽带nir发光荧光粉Y2CaAl4SiO12:Cr3+。在435 nm光激发下，Y2CaAl4SiO12:0.05Cr3+荧光粉在700 ~ 1100 nm范围内显示出宽带近红外发射，半峰全宽为159 nm。详细论证了Cr3+掺杂浓度、助熔剂、烧结气氛和基体晶格组成对Cr3+发光性能的显著影响，成功获得了提高Cr3+发光性能的有效策略。更令人兴奋的是，优化后的荧光粉具有出色的热稳定性和令人满意的内量子效率，达到96%，在423 K时的发射强度可保持高达室温下的89.8%，超过了大多数报道的Cr3+掺杂近红外荧光粉。该材料在夜视和生物组织穿透等方面具有广阔的应用前景。本研究的发现和提出的简单策略可能为开发高质量的宽带近红外发射荧光粉铺平道路。

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

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.