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Development of innovative storage devices using silicon nanowire arrays

Research Project

Project/Area Number 16K14546
Research Category

Grant-in-Aid for Challenging Exploratory Research

Allocation TypeMulti-year Fund
Research Field Energy engineering
Research InstitutionNagoya University

Principal Investigator

Kurokawa Yasuyoshi  名古屋大学, 工学研究科, 准教授 (00588527)

Project Period (FY) 2016-04-01 – 2019-03-31
Project Status Completed (Fiscal Year 2018)
Budget Amount *help
¥3,770,000 (Direct Cost: ¥2,900,000、Indirect Cost: ¥870,000)
Fiscal Year 2018: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2017: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2016: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Keywordsナノ材料 / 電子デバイス・機器 / 電子・電気材料 / 表面・界面物性 / 半導体物性 / 蓄電デバイス / IoT / ナノ構造 / シリコン / キャパシタ / 原子層堆積法 / ナノワイヤ
Outline of Final Research Achievements

Development of innovative storage devices with silicon nanowire (SiNW) arrays was researched. SiNW arrays were prepared by the metal assisted chemical etching method, which enables us to obtain SiNW arrays easily in a large area. To obtain dielectric materials with high-k and low leakage current, Al2O3/TiO2/Al2O3 stack layers were deposited on SiNW arrays by atomic layer deposition. From a high-angle annular dark field scanning transmission electron microscopy (HAADF-STEM) image, the thicknesses of each layer in the ATA stack layer were 3.7nm/15.2nm/3.6nm and the SiNW arrays were covered with the ATA stack layer completely. When the length of SiNW arrays was 8 μm, the electrostatic capacity of the SiNW MOS capacitor reached 84μF/cm2, which is the highest value in the SiNW MOS capacitors reported before.

Academic Significance and Societal Importance of the Research Achievements

Siナノワイヤ(SiNW) MOSキャパシタは、3次元ナノ構造の非常に大きな表面積を利用することにより、平板のMOSキャパシタと比べて大きな静電容量を得ることができる。また、電解液を使用しないため、長寿命・メンテナンスフリーである。しかし、作製方法の問題から最大で18μF/cm2の静電容量に留まっていた。本研究にて新たに高誘電率および低リーク電流をねらったAl2O3/TiO2/Al2O3(ATA)積層膜をSiNW MOSキャパシタに導入し、84μF/cm2のこれまでにない高い静電容量を得ることができた。金属電極構造の最適化によりさらなる大容量化が可能であり、実用化に近づく大きな成果である。

Report

(4 results)
  • 2018 Annual Research Report   Final Research Report ( PDF )
  • 2017 Research-status Report
  • 2016 Research-status Report
  • Research Products

    (27 results)

All 2019 2018 2017 Other

All Journal Article (7 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 7 results,  Open Access: 2 results) Presentation (17 results) (of which Int'l Joint Research: 10 results,  Invited: 1 results) Remarks (3 results)

  • [Journal Article] Fabrication of a Silicon Nanowire Solar Cell on a Silicon-on-Insulator Substrate2019

    • Author(s)
      Kato Shinya、Kurokawa Yasuyoshi、Gotoh Kazuhiro、Soga Tetsuo
    • Journal Title

      Applied Sciences

      Volume: 9 Issue: 5 Pages: 818-818

    • DOI

      10.3390/app9050818

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Silicon Nanowire Heterojunction Solar Cells with an Al2O3 Passivation Film Fabricated by Atomic Layer Deposition2019

    • Author(s)
      Kato Shinya、Kurokawa Yasuyoshi、Gotoh Kazuhiro、Soga Tetsuo
    • Journal Title

      Nanoscale Research Letters

      Volume: 14 Issue: 1 Pages: 99-99

    • DOI

      10.1186/s11671-019-2930-1

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Local Structure of High Performance TiOx Electron-Selective Contact Revealed by Electron Energy Loss Spectroscopy x Electron-Selective Contact Revealed by Electron Energy Loss Spectroscopy2018

    • Author(s)
      Mochizuki Takeya、Gotoh Kazuhiro、Kurokawa Yasuyoshi、Yamamoto Takahisa、Usami Noritaka
    • Journal Title

      Advanced Materials Interfaces

      Volume: 6 Issue: 3 Pages: 1801645-1801645

    • DOI

      10.1002/admi.201801645

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Activation mechanism of TiOx passivating layer on crystalline Si2018

    • Author(s)
      Mochizuki Takeya、Gotoh Kazuhiro、Ohta Akio、Ogura Shohei、Kurokawa Yasuyoshi、Miyazaki Seiichi、Fukutani Katsuyuki、Usami Noritaka
    • Journal Title

      Applied Physics Express

      Volume: 11 Issue: 10 Pages: 102301-102301

    • DOI

      10.7567/apex.11.102301

    • NAID

      210000136372

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Investigation of effective near-infrared light-trapping structure with submicron diameter for crystalline silicon thin film solar cells2018

    • Author(s)
      Sei Miki、Kurokawa Yasuyoshi、Kato Shinya、Usami Noritaka
    • Journal Title

      Japanese Journal of Applied Physics

      Volume: 57 Issue: 8S3 Pages: 08RB21-08RB21

    • DOI

      10.7567/jjap.57.08rb21

    • NAID

      210000149503

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Fabrication of silicon nanowire based solar cells using TiO2/Al2O3 stack thin films2018

    • Author(s)
      Kurokawa Yasuyoshi、Nezasa Ryota、Kato Shinya、Miyazaki Hisashi、Takahashi Isao、Usami Noritaka
    • Journal Title

      MRS Advances

      Volume: 3 Issue: 25 Pages: 1419-1426

    • DOI

      10.1557/adv.2018.40

    • Related Report
      2018 Annual Research Report 2017 Research-status Report
    • Peer Reviewed
  • [Journal Article] Bandgap tuning of silicon nanowire arrays for application to all-silicon tandem solar cells2017

    • Author(s)
      Yasuyoshi Kurokawa, Mitsugu Yano, Shinsuke Miyajima and Akira Yamada
    • Journal Title

      Japanese Journal of Applied Physics

      Volume: 56 Issue: 4S Pages: 04CS03-04CS03

    • DOI

      10.7567/jjap.56.04cs03

    • NAID

      210000147692

    • Related Report
      2017 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Presentation] Effective Near-Infrared Light-Trapping Silicon Nanowire Structure for Crystalline Silicon Thin Film Solar Cells2019

    • Author(s)
      Yasuyoshi Kurokawa, Shinya Kato, Noritaka Usami
    • Organizer
      Japan-Korea PV Joint Student Seminar
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] ALD 法で作製したTiOx 電子選択層の積層化による電気的特性の制御2019

    • Author(s)
      望月 健矢, 後藤 和泰, 黒川 康良, 宇佐美 徳隆
    • Organizer
      第66回応用物理学会春季学術講演会
    • Related Report
      2018 Annual Research Report
  • [Presentation] ALD法で作製した法で作製したTiOx/SiOx/結晶Siヘテロ界面のパッシベーョン効果発現メカニズム ~水素原子脱離の影響~2019

    • Author(s)
      望月 健矢, 後藤 和泰, 北條 智彦, 黒川 康良, 秋山 英二, 宇佐美 徳隆
    • Organizer
      第66回応用物理学会春季学術講演会
    • Related Report
      2018 Annual Research Report
  • [Presentation] Silicon Nanostructure for Solar Cell Applications2019

    • Author(s)
      Y. Kurokawa
    • Organizer
      Silicon Nanostructure for Solar Cell Applications
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Impact of interlayers on thermal stability of TiOx passivating layer deposited by atomic layer deposition2018

    • Author(s)
      T. Mochizuki, K. Gotoh, Y. Kurokawa, and N. Usami
    • Organizer
      10th International Workshop on Crystalline Silicon for Solar Cells
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] EFFECT OF NOVEL SUB-MICRON STRUCTURE FABRICATED ONTO CRYSTALLINE SILICON ON OPTICAL PROPERITES AND MINORITY CARRIER LIFETIME2018

    • Author(s)
      Miki Sei, Yasuyoshi Kurokawa, Shinya Kato, Kazuhiro Gotoh, Noritaka Usami
    • Organizer
      Grand Renewable Energy 2018
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Local structure of high performance TiOx passivating layer revealed by electron energy loss spectroscopy2018

    • Author(s)
      T. Mochizuki, K. Gotoh, A. Ohta, Y. Kurokawa, S. Miyazaki, T. Yamamoto, N. Usami
    • Organizer
      The 7th World Conference on Photovoltaic EnergyConversion (WCPEC-7)
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 薄型結晶Si太陽電池応用に向けたサブミクロンSiナノワイヤ構造の作製と評価2018

    • Author(s)
      根笹良太, 清美樹, 黒川康良, 宇佐美徳隆
    • Organizer
      第15回「次世代の太陽光発電システム」シンポジウム
    • Related Report
      2018 Annual Research Report
  • [Presentation] Evaluation of Si Nanowire MOS Capacitor Using High-k Dielectric Materials2018

    • Author(s)
      R. Nezasa, Y. Kurokawa, N. Usami
    • Organizer
      IEEE NANO 2018
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 電子エネルギー損失分光法を用いた高パッシベーション性能TiOx/SiOxヘテロ界面の局所構造の解明2018

    • Author(s)
      望月健矢,後藤和泰,黒川康良,山本剛久,宇佐美徳隆
    • Organizer
      第79回応用物理学会秋季学術講演会
    • Related Report
      2018 Annual Research Report
  • [Presentation] 望月健矢,後藤和泰,黒川康良,山本剛久,宇佐美徳隆2018

    • Author(s)
      望月健矢,後藤和泰,黒川康良,山本剛久,宇佐美徳隆
    • Organizer
      第12回 物性科学領域横断研究会
    • Related Report
      2018 Annual Research Report
  • [Presentation] Local analysis of TiOx/SiOx stack with excellent electrical properties for carrier selective contact2018

    • Author(s)
      Kazuhiro Gotoh, Yasuyoshi Kurokawa, Takahisa Yamamoto, Noritaka Usami
    • Organizer
      The Forum on the Science and Technology of Silicon Materials 2018
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Influence of Light Soaking on c-Si Surface Passivation by Atomic Layer Deposited Titanium Oxide2018

    • Author(s)
      Shinsuke Miyagawa, Takeya Mochizuki, Kazuhiro Gotoh, Yasuyoshi Kurokawa, and Noritaka Usami
    • Organizer
      Japan-Korea PV Joint Student Seminar
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 高誘電率材料を用いたSiナノワイヤMOSキャパシタの特性評価2018

    • Author(s)
      根笹良太、黒川康良、宇佐美徳隆
    • Organizer
      第65回 応用物理学会 春季学術講演会
    • Related Report
      2017 Research-status Report
  • [Presentation] Fabrication of a Si Nanowire MOS Capacitor for the Application to Energy Storage Devices2017

    • Author(s)
      R. Nezasa, Y. Kurokawa, and N. Usami
    • Organizer
      International Conference on Solid State Devices and Materials (SSDM 2017)
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research
  • [Presentation] Performance Improvement of Silicon Nanowire Based Solar Cells Using Al2O3/TiO2 Passivation Films2017

    • Author(s)
      Y. Kurokawa, R. Nezasa, S. Kato, H. Miyazaki, I. Takahashi, and N. Usami
    • Organizer
      2017 MRS Fall Meeting & Exhibit
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research
  • [Presentation] 大容量蓄電デバイス応用に向けたSiナノワイヤMOSキャパシタの作製2017

    • Author(s)
      根笹良太、黒川康良、宇佐美徳隆
    • Organizer
      日本学術振興会第175委員会 第14回「次世代の太陽光発電システム」シンポジウム
    • Related Report
      2017 Research-status Report
  • [Remarks] 宇佐美・黒川研究室

    • URL

      http://www.numse.nagoya-u.ac.jp/photonics/

    • Related Report
      2018 Annual Research Report 2017 Research-status Report
  • [Remarks] 名古屋大学教員データベース

    • URL

      http://profs.provost.nagoya-u.ac.jp/view/html/100008535_ja.html

    • Related Report
      2018 Annual Research Report
  • [Remarks] 名古屋大学 宇佐美・黒川研究室

    • URL

      http://www.numse.nagoya-u.ac.jp/photonics/

    • Related Report
      2016 Research-status Report

URL: 

Published: 2016-04-21   Modified: 2020-03-30  

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