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A new electrode design for ambipolar injection in organic semiconductors

Author

Listed:
  • Thangavel Kanagasekaran

    (Tohoku University)

  • Hidekazu Shimotani

    (Tohoku University)

  • Ryota Shimizu

    (Tohoku University)

  • Taro Hitosugi

    (Tohoku University)

  • Katsumi Tanigaki

    (Tohoku University
    Tohoku University)

Abstract

Organic semiconductors have attracted much attention for low-cost, flexible and human-friendly optoelectronics. However, achieving high electron-injection efficiency is difficult from air-stable electrodes and cannot be equivalent to that of holes. Here, we present a novel concept of electrode composed of a bilayer of tetratetracontane (TTC) and polycrystalline organic semiconductors (pc-OSC) covered by a metal layer. Field-effect transistors of single-crystal organic semiconductors with the new electrodes of M/pc-OSC/TTC (M: Ca or Au) show both highly efficient electron and hole injection. Contact resistance for electron injection from Au/pc-OSC/TTC and hole injection from Ca/pc-OSC/TTC are comparable to those for electron injection from Ca and hole injection from Au, respectively. Furthermore, the highest field-effect mobilities of holes (22 cm2 V–1 s–1) and electrons (5.0 cm2 V–1 s–1) are observed in rubrene among field-effect transistors with electrodes so far proposed by employing Ca/pc-OSC/TTC and Au/pc-OSC/TTC electrodes for electron and hole injection, respectively.

Suggested Citation

  • Thangavel Kanagasekaran & Hidekazu Shimotani & Ryota Shimizu & Taro Hitosugi & Katsumi Tanigaki, 2017. "A new electrode design for ambipolar injection in organic semiconductors," Nature Communications, Nature, vol. 8(1), pages 1-7, December.
    • Handle: RePEc:nat:natcom:v:8:y:2017:i:1:d:10.1038_s41467-017-01047-9
    DOI: 10.1038/s41467-017-01047-9
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    Cited by:

    1. Yinan Huang & Kunjie Wu & Yajing Sun & Yongxu Hu & Zhongwu Wang & Liqian Yuan & Shuguang Wang & Deyang Ji & Xiaotao Zhang & Huanli Dong & Zhongmiao Gong & Zhiyun Li & Xuefei Weng & Rong Huang & Yi Cui, 2024. "Unraveling the crucial role of trace oxygen in organic semiconductors," Nature Communications, Nature, vol. 15(1), pages 1-9, December.
    2. Ming-Peng Zhuo & Xiao Wei & Yuan-Yuan Li & Ying-Li Shi & Guang-Peng He & Huixue Su & Ke-Qin Zhang & Jin-Ping Guan & Xue-Dong Wang & Yuchen Wu & Liang-Sheng Liao, 2024. "Visualizing the interfacial-layer-based epitaxial growth process toward organic core-shell architectures," Nature Communications, Nature, vol. 15(1), pages 1-11, December.

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