The luminescence enhancement of NaLaSiO4:Tb3+ green phosphor by co-substituting Si4+-O2-/La3+-O2- with B3+-F-/Ba2+-F- for white light-emitting diodes

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.2025.01.122

Xianzhu Zhou , Wentao Zhang , Zhou Zhao , Peicong Zhang , Ning Sun , Xiangkui Cheng

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引用次数: 0

Abstract

Based on the green emission of NaLa_0.82SiO₄:0.18Tb³⁺ phosphor, the luminescence properties including intensity and stability of phosphor was effectively improved via the isomorphic substitution of crystal groups including [B³⁺-F^-]→[Si⁴⁺-O^2-] and [Ba²⁺-F^-]→[La³⁺-O^2-]. The luminescence intensities (λ_em = 544 nm) of NaLa_0.82Si_0.96B_0.04O_3.96F_0.04:0.18Tb³⁺ and NaLa_0.78Ba_0.04SiO_3.96F_0.04:0.18Tb³⁺ increased to 4.22 times and 5.49 times that of NaLa_0.82SiO₄:0.18Tb³⁺, respectively. Moreover, even at an operating temperature of 423 K, these both phosphors retained 95 % of their initial luminescence intensity, demonstrating excellent thermal stability. Notably, the fabricated w-LEDs devices with the as-prepared green phosphors emitted a bright warm white light, which showing excellent colorimetric parameters of CCT = 4596 K and Ra = 89.2. The color gamut of fitted LCD reaches 75.16 % of the National Television System Committee (NTSC) standard. The results indicate that the NaLa_0.82Si_0.96B_0.04O_3.96F_0.04:0.18Tb³⁺ and NaLa_0.78Ba_0.04SiO_3.96F_0.04:0.18Tb³⁺ green-emitting phosphors have great potential in the applications of LCD backlight and solid-state lighting.

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用B3+- f -/Ba2+- f -共取代Si4+- o2 -/La3+- o2 -对白光二极管的发光增强

以NaLa0.82SiO4:0.18Tb3+荧光粉的绿色发光为基础，通过[B3+- f -]→[Si4+- o2 -]和[Ba2+- f -]→[La3+- o2 -]晶体群的同构取代，有效地提高了荧光粉的发光性能，包括发光强度和稳定性。nala0.82 si0.96 b0.040 o3.96 f0.04:0.18 tb3 +和NaLa0.78Ba0.04SiO3.96F0.04:0.18Tb3+的发光强度（λem = 544 nm）分别是NaLa0.82SiO4:0.18Tb3+的4.22倍和5.49倍。此外，即使在423 K的工作温度下，这两种荧光粉仍保持其初始发光强度的95%，表现出优异的热稳定性。值得注意的是，使用绿色荧光粉制备的w- led器件发出明亮的暖白光，其比色参数为CCT = 4596 K和Ra = 89.2。安装的LCD色域达到国家电视系统委员会（NTSC）标准的75.16%。结果表明，nala0.82 si0.96 b0.040 o3.96 f0.04:0.18 tb3 +和NaLa0.78Ba0.04SiO3.96F0.04:0.18Tb3+绿色发光荧光粉在LCD背光和固态照明方面具有很大的应用潜力。

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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.