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<p>Carbon quantum dots (CQDs) is a challenging luminescent emission material for the next-generation organic electroluminescent light emitting diodes (ELEDs. Herein, we fabricated ELEDs with the emitting layer (EML) comprised by poly(N,N'-bis-4-butylphenyl-N,N'-bisphenyl)benzidine as a polymer matrix and CQDs. The latter were obtained from the precursors, citric acid and L-phenylalanine, via hydrothermal synthesis. We found that the CQDs incorporation into the P-TPD matrix effectively enhances electron transport. At a CQDs concentration of 25 wt %, the electron mobility in the composite is two orders of magnitude higher than the hole mobility. We detected that the CQDs incorporation in EML varies the ELED’s emission color. When we added 12 wt % of CQDs in EML, we fabricated a warm white-emitting ELED (Commission Internationale de L’Eclairage (CIE) coordinates of (0.42, 0.39), correlated color temperature (CCT) of 3200&#xa0;K, and a maximum luminance of 184&#xa0;cd&#xa0;m<sup>−2</sup>), which is essential for a harmonious lighting environment. At the CQDs content equal to 25 wt %, we obtained a blue-emitted ELED (CIE coordinates of (0.25, 0.28) and CCT of 14,300&#xa0;K).</p>

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Charge carrier transport in a P-TPD:carbon quantum dots layer and electroluminescence of the related OLED

  • 期刊论文

  • 发表日期：

    2026年6月14日

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  • Ildar Sayarov,
  • Anastasia Borodina,
  • Sergei Kostromin,
  • Alexey Tameev,
  • Sergei Bronnikov

摘要

Carbon quantum dots (CQDs) is a challenging luminescent emission material for the next-generation organic electroluminescent light emitting diodes (ELEDs. Herein, we fabricated ELEDs with the emitting layer (EML) comprised by poly(N,N'-bis-4-butylphenyl-N,N'-bisphenyl)benzidine as a polymer matrix and CQDs. The latter were obtained from the precursors, citric acid and L-phenylalanine, via hydrothermal synthesis. We found that the CQDs incorporation into the P-TPD matrix effectively enhances electron transport. At a CQDs concentration of 25 wt %, the electron mobility in the composite is two orders of magnitude higher than the hole mobility. We detected that the CQDs incorporation in EML varies the ELED’s emission color. When we added 12 wt % of CQDs in EML, we fabricated a warm white-emitting ELED (Commission Internationale de L’Eclairage (CIE) coordinates of (0.42, 0.39), correlated color temperature (CCT) of 3200 K, and a maximum luminance of 184 cd m−2), which is essential for a harmonious lighting environment. At the CQDs content equal to 25 wt %, we obtained a blue-emitted ELED (CIE coordinates of (0.25, 0.28) and CCT of 14,300 K).