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<p>We investigated ligand-engineered SnO₂ nanoparticles (NPs) as electron transport layers in solution-processed quantum dot light-emitting diodes (QLEDs). Organic ligands with varying chain lengths were introduced to improve the dispersion of SnO₂ NPs in organic solvents. Structural and optical analyses confirmed successful ligand attachment. Additionally, device characterization revealed that longer ligands enhanced dispersion but suppressed electron transport, leading to decreased luminance and efficiency. Among the configurations tested, SnO₂ NPs with the short-chained ligand exhibited superior device performance with a current efficiency of 14.56&#xa0;cd/A. Our findings highlight the trade-off between processability and charge transport, demonstrating the importance of optimized ligand engineering for fabricating high-performance QLEDs.</p>

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Surface engineering of SnO2 nanoparticles as electron transport layers for efficient quantum dot light-emitting diodes

  • 期刊论文

  • 发表日期：

    2025年6月21日

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  • Hyeyeong Jung,
  • Jaehyung Park,
  • Jiwan Kim

摘要

We investigated ligand-engineered SnO₂ nanoparticles (NPs) as electron transport layers in solution-processed quantum dot light-emitting diodes (QLEDs). Organic ligands with varying chain lengths were introduced to improve the dispersion of SnO₂ NPs in organic solvents. Structural and optical analyses confirmed successful ligand attachment. Additionally, device characterization revealed that longer ligands enhanced dispersion but suppressed electron transport, leading to decreased luminance and efficiency. Among the configurations tested, SnO₂ NPs with the short-chained ligand exhibited superior device performance with a current efficiency of 14.56 cd/A. Our findings highlight the trade-off between processability and charge transport, demonstrating the importance of optimized ligand engineering for fabricating high-performance QLEDs.