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Making silver a stronger n-dopant than cesium via in situ coordination reaction for organic electronics

Author

Listed:
  • Zhengyang Bin

    (Tsinghua University
    Sichuan University)

  • Guifang Dong

    (Tsinghua University)

  • Pengcheng Wei

    (Tsinghua University)

  • Ziyang Liu

    (Tsinghua University)

  • Dongdong Zhang

    (Tsinghua University)

  • Rongchuan Su

    (Sichuan University)

  • Yong Qiu

    (Tsinghua University)

  • Lian Duan

    (Tsinghua University
    Tsinghua University)

Abstract

N-doping is an effective way to increase the electron conductivity of organic semiconductors and achieve ohmic cathode contacts in organic electronics. To avoid the use of difficult-to-handle highly reactive n-dopants, air-stable precursors are widely used nowadays, which could decompose to release reactive species in a subtractive way though always with unwanted and even harmful byproducts during processing. Here, we show that air-stable metals, such as copper, silver and gold, could release free electrons readily in the presence of chelating ligands, as the irreversible coordination reaction between metal ions and the ligands would push the equilibrium between metals and metal ions to the forward direction. By using a well-designed multi-functional electron transport material with a strong nucleophilic quality, 4,7-dimethoxy-1,10-phenanthroline (p-MeO-Phen), silver could function as an n-dopant stronger than cesium and could be used to fabricate organic light-emitting diodes with higher performance than the cesium-doped control device.

Suggested Citation

  • Zhengyang Bin & Guifang Dong & Pengcheng Wei & Ziyang Liu & Dongdong Zhang & Rongchuan Su & Yong Qiu & Lian Duan, 2019. "Making silver a stronger n-dopant than cesium via in situ coordination reaction for organic electronics," Nature Communications, Nature, vol. 10(1), pages 1-7, December.
    • Handle: RePEc:nat:natcom:v:10:y:2019:i:1:d:10.1038_s41467-019-08821-x
    DOI: 10.1038/s41467-019-08821-x
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    Cited by:

    1. Ziyang Liu & Xiao Li & Yang Lu & Chen Zhang & Yuewei Zhang & Tianyu Huang & Dongdong Zhang & Lian Duan, 2022. "In situ-formed tetrahedrally coordinated double-helical metal complexes for improved coordination-activated n-doping," Nature Communications, Nature, vol. 13(1), pages 1-11, December.
    2. Cheng Gong & Haiyun Li & Huaxin Wang & Cong Zhang & Qixin Zhuang & Awen Wang & Zhiyuan Xu & Wensi Cai & Ru Li & Xiong Li & Zhigang Zang, 2024. "Silver coordination-induced n-doping of PCBM for stable and efficient inverted perovskite solar cells," Nature Communications, Nature, vol. 15(1), pages 1-10, December.

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