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Highly efficient and eco-friendly green quantum dot light-emitting diodes through interfacial potential grading

Author

Listed:
  • Yuhe Bi

    (Guangxi University)

  • Jianhui Sun

    (Heilongjiang University)

  • Sheng Cao

    (Guangxi University)

  • Qiuyan Li

    (Guangxi University)

  • Jinju Zheng

    (Ningbo University of Technology)

  • Xi Yuan

    (Jilin Normal University)

  • Yunjun Wang

    (Suzhou Xingshuo Nanotech Co. Ltd. (Mesolight))

  • Bingsuo Zou

    (Guangxi University
    Guangxi University)

  • Jialong Zhao

    (Guangxi University)

Abstract

As next-generation display technologies, eco-friendly colloidal quantum dot light-emitting diodes have drawn great attention due to their excellent luminescence properties, along with their rapid development. However, practical applications of eco-friendly quantum dot light-emitting device remain challenging, primarily due to the inferior performance of green device, which still lag behind their red and blue counterparts. Herein, we present efficient green device based on interfacial potential-graded ZnSeTe quantum dots. Our findings show that this potential-graded structure alleviates interfacial lattice mismatch and strain, reducing structural deformation and misfit defects. The smoothed interfacial potential suppresses the nonradiative recombination processes, particularly Auger recombination revealed by excitation-intensity dependent ultrafast transient absorption kinetics. Consequently, the interfacial potential-graded quantum dots demonstrate highly efficient green quantum dot light-emitting diodes, with a peak external quantum efficiency of 21.7% at 520 nm and a corresponding current efficiency of 75.7 cd A−1.

Suggested Citation

  • Yuhe Bi & Jianhui Sun & Sheng Cao & Qiuyan Li & Jinju Zheng & Xi Yuan & Yunjun Wang & Bingsuo Zou & Jialong Zhao, 2025. "Highly efficient and eco-friendly green quantum dot light-emitting diodes through interfacial potential grading," Nature Communications, Nature, vol. 16(1), pages 1-10, December.
    • Handle: RePEc:nat:natcom:v:16:y:2025:i:1:d:10.1038_s41467-025-57304-9
    DOI: 10.1038/s41467-025-57304-9
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    References listed on IDEAS

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    1. Xiaoyong Wang & Xiaofan Ren & Keith Kahen & Megan A. Hahn & Manju Rajeswaran & Sara Maccagnano-Zacher & John Silcox & George E. Cragg & Alexander L. Efros & Todd D. Krauss, 2009. "Non-blinking semiconductor nanocrystals," Nature, Nature, vol. 459(7247), pages 686-689, June.
    2. Yuanzhi Jiang & Minghuan Cui & Saisai Li & Changjiu Sun & Yanmin Huang & Junli Wei & Li Zhang & Mei Lv & Chaochao Qin & Yufang Liu & Mingjian Yuan, 2021. "Reducing the impact of Auger recombination in quasi-2D perovskite light-emitting diodes," Nature Communications, Nature, vol. 12(1), pages 1-10, December.
    3. Mengqi Li & Rui Li & Longjia Wu & Xiongfeng Lin & Xueqing Xia & Zitong Ao & Xiaojuan Sun & Xingtong Chen & Song Chen, 2024. "Ultrabright and stable top-emitting quantum-dot light-emitting diodes with negligible angular color shift," Nature Communications, Nature, vol. 15(1), pages 1-8, December.
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