Garnet-structure phosphors with ultra-high color purity red emission for potential warm WLED and flexible-transparent displays

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

Ceramics International Pub Date : 2024-09-30 DOI:10.1016/j.ceramint.2024.09.397

Yongbin Hua , Wen-Xing Yang , Weiguang Ran

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引用次数: 0

Abstract

Red-emitting phosphors play a pivotal role in the field of lighting technologies. This study introduces an innovative class of Li₆SrEu₂Sb₂O₁₂ garnet-structured phosphors, distinguished by the resistance to concentration quenching. A comprehensive examination of the crystal structure, electronic configuration, and photoluminescence characteristics has been conducted. Notably, the doping Eu³⁺ ions and their doping concentrations barely affected the crystal structure and morphology, and the band gap slightly decreased as the doping concentration increased. Interestingly, the obtained samples exhibit an ultra-high color purity, good thermal stability (78.60 % at 423 K), and suitable internal photoluminescence quantum yield (44.18 %). Consequently, a phosphor-converted white LED has been successfully fabricated, which boasts an outstanding correlated color temperature of 3271 K. Beyond conventional application, this research also introduces the concept of innovative flexible-transparent displays harnessing the phosphor film. Overall, this work has synthesized a groundbreaking red-emitting phosphor, poised to enhance traditional lighting sources and potentially pave the way for new applications in the field of advanced optical displays.

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具有超高色纯红色发射的石榴石结构荧光粉，可用于暖色 WLED 和柔性透明显示器

红色发光荧光粉在照明技术领域发挥着举足轻重的作用。本研究介绍了一类创新的 Li6SrEu2Sb2O12 石榴石结构荧光粉，其显著特点是耐浓淬性。该研究对晶体结构、电子构型和光致发光特性进行了全面考察。值得注意的是，掺杂 Eu3+ 离子及其掺杂浓度几乎不影响晶体结构和形貌，带隙随着掺杂浓度的增加而略有减小。有趣的是，所获得的样品具有超高的色纯度、良好的热稳定性（423 K 时为 78.60%）和合适的内部光致发光量子产率（44.18%）。除传统应用外，这项研究还提出了利用荧光粉薄膜制造创新型柔性透明显示器的概念。总之，这项工作合成了一种突破性的红色发光荧光粉，有望增强传统照明光源，并为先进光学显示领域的新应用铺平道路。

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.