Enlarging Environmental Asymmetry by the Site Tailoring to Enhance Luminescence Properties of Sm3+ in the (Gd,Na)3(Ga,In)2(Ga,Ge)3O12 Garnet

IF 4.3 2区化学 Q1 CHEMISTRY, INORGANIC & NUCLEAR

Inorganic Chemistry Pub Date : 2025-04-02 DOI:10.1021/acs.inorgchem.5c00549

Jiajun Feng, Yongxin Yu, Hongji Song, Zibo Chen, Yingxiang Zhu, Jiahui Liu, Jingtian Xie, Lianfen Chen, Junhao Li

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Abstract

A structural design strategy was employed to develop NaGd₂Ga₂InGe₂O₁₂:Sm³⁺ (NGGIG:Sm³⁺) garnet phosphors, optimizing the local coordination environment to enhance luminescence performance. By tailoring site occupation, Sm³⁺ ions were incorporated into an asymmetric crystal field, where a statistical probability model confirmed that ∼97% of Sm³⁺ ions reside in distorted coordination environments, promoting electric dipole(ED) transitions. The phosphors exhibit a high red-to-orange (R/O) intensity ratio of 2.97, contributing to enhanced red emission. CIE chromaticity coordinates of (0.61, 0.39) indicate a significant shift toward the red region, and the phosphors retain over 70% of their luminescence intensity at 400 K, demonstrating good thermal stability. These characteristics make NGGIG:Sm³⁺ a promising candidate for high-performance red phosphors in solid-state lighting applications, highlighting the effectiveness of site engineering in garnet structures for optimizing luminescence efficiency and stability.

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通过位点裁剪扩大环境不对称性以增强(Gd,Na)3(Ga,In)2(Ga,Ge)3O12石榴石中 Sm3+ 的发光特性

采用结构设计策略制备了NaGd2Ga2InGe2O12:Sm3+ (NGGIG:Sm3+)石榴石荧光粉，优化了局部配位环境，提高了发光性能。通过调整位置占用，Sm3+离子被纳入不对称晶体场，其中统计概率模型证实，约97%的Sm3+离子存在于扭曲的配位环境中，促进电偶极子（ED）转变。该荧光粉具有较高的红橙（R/O）强度比为2.97，有助于增强红色发射。CIE色度坐标为（0.61,0.39）时，荧光粉明显向红色区域偏移，在400 K时，荧光粉保持了70%以上的发光强度，表现出良好的热稳定性。这些特性使NGGIG:Sm3+成为固态照明应用中高性能红色荧光粉的有希望的候选者，突出了石榴石结构中位点工程对优化发光效率和稳定性的有效性。

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来源期刊

Inorganic Chemistry 化学-无机化学与核化学

CiteScore

7.60

自引率

13.00%

发文量

1960

审稿时长

1.9 months

期刊介绍： Inorganic Chemistry publishes fundamental studies in all phases of inorganic chemistry. Coverage includes experimental and theoretical reports on quantitative studies of structure and thermodynamics, kinetics, mechanisms of inorganic reactions, bioinorganic chemistry, and relevant aspects of organometallic chemistry, solid-state phenomena, and chemical bonding theory. Emphasis is placed on the synthesis, structure, thermodynamics, reactivity, spectroscopy, and bonding properties of significant new and known compounds.