Synergistic Enhancement of White Luminescence in WLEDs via g-C3N4-Integrated Ln-MOF Composites with Suppressed Antenna Effect

IF 2.6 4区材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY

Electronic Materials Letters Pub Date : 2025-05-21 DOI:10.1007/s13391-025-00578-4

Jinhu Guo, Qianwei Wang, Qi Wu, Xinyu Yang, Mengxuan Fang, Yang Li, Li Zhang, Longcheng Wang

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引用次数: 0

Abstract

This study proposes a novel strategy to enhance the performance of white light-emitting diodes (WLEDs) by integrating graphitic carbon nitride (g-C₃N₄) as an independent blue emitter into Tb³⁺/Eu³⁺-doped lanthanide metal–organic frameworks (Ln-MOFs). Traditional Ln-MOF-based WLEDs suffer from low luminous efficiency due to the Antenna Effect, which compromises energy transfer between ligands and lanthanide ions. By incorporating g-C₃N₄ with high-concentration Tb³⁺/Eu³⁺-doped Ln-MOFs, the optimized composite material, g-C₃N₄@Tb_0.95Eu_0.05-MOF, demonstrated remarkable improvements in photoluminescence properties. Compared to conventional Gd_0.978Tb_0.02Eu_0.002-MOF, the composite achieved a luminous flux of 1.24 lm, luminous efficacy of 1.66 lm/W, and color rendering index (CRI) of 91.6, representing 10.34-fold, 9.23-fold, and 9.0 enhancements, respectively. Mechanistic studies revealed no energy transfer between g-C₃N₄ and Ln³⁺ ions, enabling stable blue emission from g-C₃N₄ while high-concentration Tb³⁺ and Eu³⁺ ions enhanced green and red emissions. This work provides a promising approach for designing high-performance WLEDs.

Graphic Abstract

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抑制天线效应的g- c3n4集成Ln-MOF复合材料协同增强wled白光

本研究提出了一种新的策略，通过将石墨氮化碳（g-C3N4）作为独立的蓝色发射器集成到Tb3+/Eu3+掺杂的镧系金属有机框架（mn - mofs）中来提高白光发光二极管（wled）的性能。传统的基于mn - mof的wled由于天线效应而导致发光效率低，这影响了配体和镧系离子之间的能量传递。通过将g-C3N4与高浓度Tb3+/Eu3+掺杂的Ln-MOFs相结合，优化后的复合材料g-C3N4@Tb0.95Eu0.05-MOF的光致发光性能得到了显著改善。与传统的Gd0.978Tb0.02Eu0.002-MOF相比，该复合材料的光通量为1.24 lm，光效为1.66 lm/W，显色指数（CRI）为91.6，分别提高了10.34倍、9.23倍和9.0倍。机理研究表明，g-C3N4和Ln3+离子之间没有能量转移，使g-C3N4的蓝色辐射稳定，而高浓度的Tb3+和Eu3+离子增强了绿色和红色辐射。这项工作为设计高性能wled提供了一种很有前途的方法。图形抽象

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来源期刊

Electronic Materials Letters 工程技术-材料科学：综合

CiteScore

4.70

自引率

20.80%

发文量

审稿时长

2.3 months

期刊介绍： Electronic Materials Letters is an official journal of the Korean Institute of Metals and Materials. It is a peer-reviewed international journal publishing print and online version. It covers all disciplines of research and technology in electronic materials. Emphasis is placed on science, engineering and applications of advanced materials, including electronic, magnetic, optical, organic, electrochemical, mechanical, and nanoscale materials. The aspects of synthesis and processing include thin films, nanostructures, self assembly, and bulk, all related to thermodynamics, kinetics and/or modeling.