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Perovskite photodiode-based high sensitivity X-ray detector for use in medical diagnosis

Research Project

Project/Area Number 17K19108
Research Category

Grant-in-Aid for Challenging Research (Exploratory)

Allocation TypeMulti-year Fund
Research Field Physical chemistry, Functional solid state chemistry, and related fields
Research InstitutionToin University of Yokohama

Principal Investigator

Miyasaka Tsutomu  桐蔭横浜大学, 医用工学部, 特任教授 【東京大学先端科学技術研究センター・フェロー】 (00350687)

Project Period (FY) 2017-06-30 – 2019-03-31
Project Status Completed (Fiscal Year 2018)
Budget Amount *help
¥6,500,000 (Direct Cost: ¥5,000,000、Indirect Cost: ¥1,500,000)
Fiscal Year 2018: ¥3,250,000 (Direct Cost: ¥2,500,000、Indirect Cost: ¥750,000)
Fiscal Year 2017: ¥3,250,000 (Direct Cost: ¥2,500,000、Indirect Cost: ¥750,000)
KeywordsX線検出 / 医療診断 / ペロブスカイト / 光電変換 / 光ダイオード / 鉛ペロブスカイト / X線 / 光物性 / 半導体物性 / 結晶工学
Outline of Final Research Achievements

The fine particles granulated from lead halide perovskite single crystal (MAPbI3) were pressed by a high temperature heating and pressing machine to form a semi-transparent film with a thickness of about 400 microns in which perovskite particles are partially fused. A metal electrode was vapor-deposited on this film to construct a planar device. The device irradiated with X-rays with energy of 20 to 50 eV under external bias of 5 to 20 V produced X-ray-induced current response. Current amplitude proportionally increased with X-ray energy. The device produced a stable current of 5 nA/cm2 or more. It has been found that the background current of the device is highly suppressed as the temperature of the device is lowered, leading to achievement of high signal/noise ratio. The perovskite-based X-ray detector showed high sensitivity that can reach a value close to the commercial X-ray detector using CdTe as photoconductor.

Academic Significance and Societal Importance of the Research Achievements

X線の検出器は医療において画像診断に用いられておりシンチレータ(発光素子)と光ダイオードの2つを使ってX線の線量を間接的に計測するが、もう1つの方法としてX線を直接に半導体素子の電流応答に変換する方法が使われ、画像分解能の点で優れることが期待さる。しかしこの直接法に用いる半導体はCdTeでありCdの有毒性が問題となる。本研究で用いたペロブスカイトはCdTeに代わる環境有害性の低い薄膜材料であり、学術的にX線に対して高い感度で電流応答をする可能性が明らかになったため、今後、ペロブスカイト結晶薄膜の質を高めることによって更なる性能向上が期待できる。

Report

(3 results)
  • 2018 Annual Research Report   Final Research Report ( PDF )
  • 2017 Research-status Report
  • Research Products

    (18 results)

All 2019 2018 2017 Other

All Journal Article (6 results) (of which Int'l Joint Research: 2 results,  Peer Reviewed: 6 results,  Open Access: 2 results) Presentation (10 results) (of which Int'l Joint Research: 1 results,  Invited: 7 results) Remarks (1 results) Patent(Industrial Property Rights) (1 results)

  • [Journal Article] Halide Perovskite Photovoltaics: Background, Status, and Future Prospects2019

    • Author(s)
      Ajay Jena, Ashish Kulkarni, Tsutomu Miyasaka
    • Journal Title

      Chemical Reviews

      Volume: 119 (5) Issue: 5 Pages: 3036-3103

    • DOI

      10.1021/acs.chemrev.8b00539

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Tolerance of Perovskite Solar Cell to High-Energy Particle Irradiations in Space Environment2018

    • Author(s)
      Miyazawa Yu、Ikegami Masashi、Chen Hsin-Wei、Ohshima Takeshi、Imaizumi Mitsuru、Hirose Kazuyuki、Miyasaka Tsutomu
    • Journal Title

      iScience

      Volume: 2 Pages: 148-155

    • DOI

      10.1016/j.isci.2018.03.020

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Lead Halide Perovskites in Thin Film Photovoltaics: Background and Perspectives2018

    • Author(s)
      Miyasaka Tsutomu
    • Journal Title

      Bulletin of the Chemical Society of Japan

      Volume: 91 Issue: 7 Pages: 1058-1068

    • DOI

      10.1246/bcsj.20180071

    • NAID

      130007404785

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Photovoltaic Properties of Two-dimensional (CH3(CH2)3NH3)2PbI4 Perovskite Crystals Oriented with TiO2 Nanowire Array2017

    • Author(s)
      Sanehira Yoshitaka, Numata Youhei, Ikegami Masashi, Miyasaka Tsutomu
    • Journal Title

      Chemistry Letters

      Volume: 46 Issue: 8 Pages: 1204-1206

    • DOI

      10.1246/cl.170428

    • NAID

      130005906940

    • Related Report
      2017 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Degradation of CH3NH3PbI3 perovskite due to soft x-ray irradiation as analyzed by an x-ray photoelectron spectroscopy time-dependent measurement method2017

    • Author(s)
      Motoki Keisuke、Miyazawa Yu、Kobayashi Daisuke、Ikegami Masashi、Miyasaka Tsutomu、Yamamoto Tomoyuki、Hirose Kazuyuki
    • Journal Title

      Journal of Applied Physics

      Volume: 121 Issue: 8 Pages: 085501-085501

    • DOI

      10.1063/1.4977238

    • Related Report
      2017 Research-status Report
    • Peer Reviewed
  • [Journal Article] First Evidence of CH3NH3PbI3 Optical Constants Improvement in a N2 Environment in the Range 40-80°C2017

    • Author(s)
      G. Mannino, A. Alberti, I. Deretzis, E. Smecca, S. Sanzaro, Y. Numata, T. Miyasaka, and Antonino La Magna
    • Journal Title

      J. Chem. Phys. C.

      Volume: 121 Issue: 14 Pages: 7703-7710

    • DOI

      10.1021/acs.jpcc.7b00764

    • Related Report
      2017 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Presentation] Photovoltaics of Halide Perovskites and Perspectives of Extensive Applications from the Ground to the Universe2018

    • Author(s)
      宮坂 力
    • Organizer
      MRS Fall Meeting, Boston
    • Related Report
      2018 Annual Research Report
    • Invited
  • [Presentation] 次世代太陽電池ペロブスカイト太陽電池の技術動向と未来2018

    • Author(s)
      宮坂 力
    • Organizer
      第66回応用物理学会春季学術講演会
    • Related Report
      2018 Annual Research Report
    • Invited
  • [Presentation] X 線回折法を用いた FA0.85Cs0.15PbI3分解過程の評価2018

    • Author(s)
      小薗江幹太、池上和志、宮坂 力、小林大輔、山本知之、廣瀬和之
    • Organizer
      第66回応用物理学会春季学術講演会
    • Related Report
      2018 Annual Research Report
  • [Presentation] 有機無機ペロブスカイトと金属錯体を用いた高感度光検出素子の開発2018

    • Author(s)
      石井あゆみ、宮坂 力
    • Organizer
      第66回応用物理学会春季学術講演会
    • Related Report
      2018 Annual Research Report
  • [Presentation] Enhancing photovoltaic performance and stability of all-inorganic and lead-free absorbers2018

    • Author(s)
      宮坂 力
    • Organizer
      International Conference on Perovskite Solar Cells, Photonics, and Optoelectronics (NIPHO19)
    • Related Report
      2018 Annual Research Report
    • Invited
  • [Presentation] Superior tolerance of perovskite thin film solar cells in the space radiation environment2018

    • Author(s)
      宮坂 力
    • Organizer
      The 7th Sungkyun International Solar Forum (SISF 2018)
    • Related Report
      2018 Annual Research Report
    • Invited
  • [Presentation] ペロブスカイト光電変換技術の現状と社会実装のビジョン2017

    • Author(s)
      宮坂 力
    • Organizer
      日本化学会第98春季年会
    • Related Report
      2017 Research-status Report
    • Invited
  • [Presentation] Towards developnment of heat tolelant and durable perovskite solar cells with stable high efficiency2017

    • Author(s)
      宮坂 力
    • Organizer
      Asia Pacific Hybrid and Organic Photovoltaics Conference (AP-HOPV17)
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] 水蒸気加熱法による酸化チタン多孔膜のナノ構造制御とペロブスカイト太陽電池への応用2017

    • Author(s)
      實平 義隆, 沼田 陽平, 池上 和志, 宮坂 力
    • Organizer
      第78回応用物理学会 秋季学術講演会
    • Related Report
      2017 Research-status Report
  • [Presentation] Creation of Organic Inorganic Hybrid Perovskite Solar Cell and Its High Efficiency Development2017

    • Author(s)
      宮坂 力
    • Organizer
      KANEKA/SKKU Incubation Center International Symposium 2017
    • Related Report
      2017 Research-status Report
    • Invited
  • [Remarks] 宮坂研究室、論文・学会発表

    • URL

      http://www.cc.toin.ac.jp/sc/miyasaka/publication/index.html

    • Related Report
      2018 Annual Research Report
  • [Patent(Industrial Property Rights)] 光電変換素子、光電変換装置、光電変換素子前駆体、可視光の検出方法、および光電変換2018

    • Inventor(s)
      宮坂力、石井あゆみ
    • Industrial Property Rights Holder
      宮坂力、石井あゆみ
    • Industrial Property Rights Type
      特許
    • Filing Date
      2018
    • Related Report
      2018 Annual Research Report

URL: 

Published: 2017-07-21   Modified: 2020-03-30  

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