用于暖白固态照明的新型相构荧光粉陶瓷：橙黄色发光(Lu,Gd)3(Sc,Al)5O12：Ce3+

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

Ceramics International Pub Date : 2024-09-24 DOI:10.1016/j.ceramint.2024.09.309

Yuelong Ma , Zezhong Yang , Yimo Zhao , Xingyu Qi , Shisheng Lin , Lan Wu , Lingwei Zeng , Lili Lu , Zongcai Wang , Xingzhou Chen , Guoxing Jiang , Dengjie Zhu , Daqin Chen

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引用次数: 0

摘要

荧光粉转换白光发光二极管（pc-wLED）和荧光粉转换白光激光二极管（pc-wLD）广泛应用于照明领域，其质量和可靠性在很大程度上取决于色彩转换器。无机色彩转换器，特别是荧光粉陶瓷（PC）的最新进展显著提高了其性能。然而，由于难以管理发射元件，实现暖白光和大量红色发射仍然具有挑战性。在这项工作中，首次利用真空烧结技术制造了一系列纯相 Ce3+ 激活石榴石结构固溶体 PC，即 (Lu,Gd)3(Sc,Al)5O12：Ce（LGSAG：Ce）。通过系统分析，可以发现 Gd3+ 的加入会通过改变晶场分裂而导致发射红移，而 Sc3+ 的加入则主要侧重于改善所制备 PC 的微观结构。特别是，用典型的 LGSAG: Ce PC 制成的 pc-wLED 发出的光明显较暖，相关色温（CCT）为 2916 K，而 LuAG: Ce PC 的相关色温（CCT）为 9557 K。同时，在 40.0 W（15.7 W/mm2）蓝色激光激发下，一个典型 LGSAG: Ce PG 的最大光通量和发光效率分别为 1172 lm 和 29.3 lm/W。因此，所开发的 LGSAG: Ce PC 在未来大功率暖白固态照明应用中作为色彩转换器具有显著的潜力。

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New phase-construction phosphors ceramics for warm-white solid-state lighting: Orange-yellow-emitting (Lu,Gd)3(Sc,Al)5O12: Ce3+

Phosphor-converted white light-emitting diodes (pc-wLEDs) and phosphor-converted white laser diodes (pc-wLDs) are extensively utilized in lighting applications, with their quality and reliability heavily dependent on color converters. Recent progress in all-inorganic color converters, particularly phosphor ceramics (PCs), have markedly enhanced performance. However, due to the difficulty of managing emissive components, achieving warm white light with substantial red emission still remains challenging. In this work, a series of pure-phase Ce³⁺-activated garnet-structured solid-solution PCs, (Lu,Gd)₃(Sc,Al)₅O₁₂: Ce (LGSAG: Ce), were fabricated using vacuum sintering technology for the first time. Through systematic analysis, it can be revealed that the addition of Gd³⁺ leads to a red shift in emission through changes in crystal-field splitting, whereas the inclusion of Sc³⁺ primarily focuses on improving the microstructure of the developed PCs. Particularly, the pc-wLED constructed from typical LGSAG: Ce PC generated significantly warmer light with a correlated color temperature (CCT) of 2916 K, compared to the 9557 K from LuAG: Ce PC. Meanwhile, under 40.0 W (15.7 W/mm²) blue laser excitation, the maximum luminous flux and luminescence efficiency of one typical LGSAG: Ce PG are 1172 lm and 29.3 lm/W, respectively. Therefore, the developed LGSAG: Ce PCs can show notable potential as color converters for future high-power warm-white solid-state lighting applications.

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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.