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A molecular ferroelectric thin film of imidazolium perchlorate on silicon

Author

Listed:
  • Congqin Zheng

    (Zhejiang University)

  • Xin Li

    (Zhejiang University)

  • Wei Li

    (Tsinghua University)

  • Tiantian Chen

    (Zhejiang University)

  • Fu Lv

    (Zhejiang University)

  • Yuhui Huang

    (Zhejiang University)

  • Qian Li

    (Tsinghua University)

  • Yongjun Wu

    (Zhejiang University)

  • Zijian Hong

    (Zhejiang University
    Zhejiang University
    Taizhou Institute of Zhejiang University)

Abstract

Molecular ferroelectrics have garnered significant attention due to their structural tunability, low synthesis temperature, and high flexibility. Herein, we successfully synthesized imidazole perchlorate (ImClO4) single crystals and high-quality, highly-oriented thin films on Si substrates. These films demonstrated a high inverse piezoelectric coefficient of 55.7 pm/V. Two types of domain bands were observed: type-I bands tilted ~60° relative to the horizontal axis, and type-II bands positioned perpendicular to the horizontal axis. Under a + 20 V bias, type-I bands showed a reduction and detachment of 180° domain walls to form a needle-like domain. It extended toward the band boundary after applying −20 V bias, which grew along the boundary upon contact. In contrast, type-II bands showed straight domain wall motion and displayed a higher piezoresponse than type-I bands. The growth of high quality molecular ferroelectric thin films on Si substrates paves the way for the development of on-chip devices.

Suggested Citation

  • Congqin Zheng & Xin Li & Wei Li & Tiantian Chen & Fu Lv & Yuhui Huang & Qian Li & Yongjun Wu & Zijian Hong, 2024. "A molecular ferroelectric thin film of imidazolium perchlorate on silicon," Nature Communications, Nature, vol. 15(1), pages 1-10, December.
    • Handle: RePEc:nat:natcom:v:15:y:2024:i:1:d:10.1038_s41467-024-52207-7
    DOI: 10.1038/s41467-024-52207-7
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    References listed on IDEAS

    as
    1. Yulong Huang & Jennifer L. Gottfried & Arpita Sarkar & Gengyi Zhang & Haiqing Lin & Shenqiang Ren, 2023. "Proton-controlled molecular ionic ferroelectrics," Nature Communications, Nature, vol. 14(1), pages 1-8, December.
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    3. Suraj S. Cheema & Daewoong Kwon & Nirmaan Shanker & Roberto Reis & Shang-Lin Hsu & Jun Xiao & Haigang Zhang & Ryan Wagner & Adhiraj Datar & Margaret R. McCarter & Claudy R. Serrao & Ajay K. Yadav & Go, 2020. "Enhanced ferroelectricity in ultrathin films grown directly on silicon," Nature, Nature, vol. 580(7804), pages 478-482, April.
    4. Suraj S. Cheema & Daewoong Kwon & Nirmaan Shanker & Roberto Reis & Shang-Lin Hsu & Jun Xiao & Haigang Zhang & Ryan Wagner & Adhiraj Datar & Margaret R. McCarter & Claudy R. Serrao & Ajay K. Yadav & Go, 2020. "Publisher Correction: Enhanced ferroelectricity in ultrathin films grown directly on silicon," Nature, Nature, vol. 581(7808), pages 5-5, May.
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