Preparation and luminescence performances of Eu3+-activated Ba2LaTaO6 phosphors with highly symmetrical structure for application of white LEDs

IF 6 2区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Ceramics International Pub Date : 2026-10-01 Epub Date: 2026-07-20 DOI:10.1016/j.ceramint.2026.07.318

Liya Jiang, Linwen Jiang, Xiaohuan Xiao, Jianguo Pan, Anhua Wu, Xu Wu, Xiaofeng Zhang

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引用次数: 0

Abstract

Exploiting red emission phosphors with high luminescent performance remains a challenge for improving phosphor-converted light-emitting diodes (LEDs). Herein, a series of Ba₂LaTaO₆: xEu³⁺ (BLTO: xEu³⁺) phosphors were fabricated by a high-temperature solid-phase method. The ultraviolet diffuse reflectance results suggest that the energy gap of BLTO: 13%Eu³⁺ phosphor is 4.02 eV. All of the obtained samples have the strongest emission peak at 594 nm instead of the common 617 nm, which may be due to the high overall symmetry of BLTO lattice. The optimal doping concentration of BLTO: xEu³⁺ is 13%, and the concentration quenching mechanism is related to the dipole-quadrupole interaction. Through the temperature-related emission spectra, it can be known that the Ba₂LaTaO₆: 13%Eu³⁺ phosphor has good thermal stability with an activated energy of 0.245 eV. In addition, the color coordinates, CCT, and CRI of the manufactured WLEDs with BLTO: Eu³⁺ phosphors are (0.3728, 0.3577), 4066 K, and 85.18 under a driving current of 20 mA, respectively, indicating that the encapsulated WLEDs are suitable for indoor lighting.

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用于白光led的高度对称结构Eu3+活化Ba2LaTaO6荧光粉的制备及发光性能

开发具有高发光性能的红色发光荧光粉仍然是改进磷转换发光二极管（led）的一个挑战。本文采用高温固相法制备了一系列Ba2LaTaO6: xEu3+ (BLTO: xEu3+)荧光粉。紫外漫反射结果表明，BLTO: 13%Eu3+荧光粉的能隙为4.02 eV。所有样品的发射峰都在594 nm处，而不是常见的617 nm处，这可能是由于BLTO晶格具有较高的整体对称性。BLTO: xEu3+的最佳掺杂浓度为13%，浓度猝灭机制与偶极-四极相互作用有关。通过温度相关发射光谱可知，Ba2LaTaO6: 13%Eu3+荧光粉具有良好的热稳定性，活化能为0.245 eV。此外，在驱动电流为20 mA时，所制备的BLTO: Eu3+荧光粉wled的色坐标、CCT和CRI分别为（0.3728,0.3577）、4066 K和85.18，表明所封装的wled适合室内照明。

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.