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<p>This study proposes a novel strategy to enhance the performance of white light-emitting diodes (WLEDs) by integrating graphitic carbon nitride (g-C<sub>3</sub>N<sub>4</sub>) as an independent blue emitter into Tb<sup>3+</sup>/Eu<sup>3+</sup>-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-C<sub>3</sub>N<sub>4</sub> with high-concentration Tb<sup>3+</sup>/Eu<sup>3+</sup>-doped Ln-MOFs, the optimized composite material, g-C<sub>3</sub>N<sub>4</sub>@Tb<sub>0.95</sub>Eu<sub>0.05</sub>-MOF, demonstrated remarkable improvements in photoluminescence properties. Compared to conventional Gd<sub>0.978</sub>Tb<sub>0.02</sub>Eu<sub>0.002</sub>-MOF, the composite achieved a luminous flux of 1.24&#xa0;lm, luminous efficacy of 1.66&#xa0;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-C<sub>3</sub>N<sub>4</sub> and Ln<sup>3+</sup> ions, enabling stable blue emission from g-C<sub>3</sub>N<sub>4</sub> while high-concentration Tb<sup>3+</sup> and Eu<sup>3+</sup> ions enhanced green and red emissions. This work provides a promising approach for designing high-performance WLEDs.</p> Graphic Abstract <p></p>

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

  • 期刊论文

  • 发表日期：

    2025年5月21日

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

摘要

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@Tb0.95Eu0.05-MOF, demonstrated remarkable improvements in photoluminescence properties. Compared to conventional Gd0.978Tb0.02Eu0.002-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