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2023 Fiscal Year Annual Research Report

Demonstration of 2-Dimensional h-BN Power Device Operation

Research Project

Project/Area Number 23KJ0416
Research InstitutionThe University of Tokyo

Principal Investigator

NGAMPRAPAWAT SUPAWAN  東京大学, 工学系研究科, 特別研究員(PD)

Project Period (FY) 2023-04-25 – 2024-03-31
Keywordshexagonal boron nitride / carbon doping / power devices / single crystal / carrier injection / rectification
Outline of Annual Research Achievements

This study proposes single-crystal carbon-doped hexagonal boron nitride (hBN:C) as a potential material for high-temperature and high-voltage two-dimensional (2D) power-switching devices, which will fulfill the 2D electronic platform. We have established the contact formation technique and shown that, with C doping, carriers can be injected, and the injection mechanism is proposed; however, when C doping density increases to 10 at% C, the applied electric field (E) induces C migration due to the existence of 2D C domains in 2D hBN matrix. The appropriate C doping density that does not lead to C domain formation is essential. To demonstrate hBN:C-based power devices, a relatively large E is required to inject carriers in a lateral structure, we thus propose a vertical structure, where the channel length is reduced from micrometer scale to nanometer scale, to show rectifying properties with an expected smaller turn-on voltage. The rectified current can be successfully observed in these vertical hBN:C devices. We have paved the way for understanding an insight into the properties of hBN:C as well as developing the future 2D hBN-based electronics.

  • Research Products

    (5 results)

All 2024 2023

All Journal Article (1 results) (of which Peer Reviewed: 1 results,  Open Access: 1 results) Presentation (4 results) (of which Int'l Joint Research: 2 results)

  • [Journal Article] From h‐BN to Graphene: Characterizations of Hybrid Carbon‐Doped h‐BN for Applications in Electronic and Optoelectronic Devices2023

    • Author(s)
      Ngamprapawat Supawan、Kawase Jimpei、Nishimura Tomonori、Watanabe Kenji、Taniguchi Takashi、Nagashio Kosuke
    • Journal Title

      Advanced Electronic Materials

      Volume: 9 Pages: 2300083

    • DOI

      10.1002/aelm.202300083

    • Peer Reviewed / Open Access
  • [Presentation] Rectifying properties of single-crystal h-BN-based vertical power devices2024

    • Author(s)
      Ngamprapawat Supawan、Nishimura Tomonori、Kanahashi Kaito、Watanabe Kenji、Taniguchi Takashi、Nagashio Kosuke
    • Organizer
      The 71st JSAP Spring Meeting 2024
  • [Presentation] From h-BN to Graphene: Understanding Electrical Conductivity of Single-Crystal Carbon-Doped h-BN through Its Structure2023

    • Author(s)
      Ngamprapawat Supawan、Nishimura Tomonori、Watanabe Kenji、Taniguchi Takashi、Nagashio Kosuke
    • Organizer
      2023 Material Research Society (MRS) spring meeting & exhibit
    • Int'l Joint Research
  • [Presentation] From h-BN to graphene: comprehensive structural characterizations of hybrid carbon-doped h-BN to understand its electrical conductivity2023

    • Author(s)
      Ngamprapawat Supawan、Kawase Jimpei、Nishimura Tomonori、Watanabe Kenji、Taniguchi Takashi、Nagashio Kosuke
    • Organizer
      2023 International Conference on Solid State Devices and Materials (SSDM)
    • Int'l Joint Research
  • [Presentation] Observation of graphene domain of C-doped monolayer h-BN by c-AFM2023

    • Author(s)
      Kawase Jimpei、Ngamprapawat Supawan、Nishimura Tomonori、Taniguchi Takashi、Watanabe Kenji、Nagashio Kosuke
    • Organizer
      The 70st JSAP Spring Meeting 2023

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Published: 2024-12-25  

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