酸化グラフェンの光デバイス応用に向けた電界発光の実現と光機能探索

2016 Fiscal Year Annual Research Report

• Project/Area Number: 15J07423
• Research Institution: Nagoya University
• Principal Investigator: 小澤 大知 名古屋大学, 工学研究科, 特別研究員(PD)
• Project Period (FY): 2015-04-24 – 2018-03-31
• Keywords: 原子層 / 電界発光 / 電気二重層トランジスタ

Outline of Annual Research Achievements

本研究の目的は、原子層材料における光デバイス応用に向けた電界発光の実現と新奇光機能の探索である。電界発光を実現するためには、発光層である酸化グラフェンに電子と正孔を注入し、それらを再結合させることが必要となる。そこで今年度は電界発光の前段階として、原子層にp-n接合を形成すること、及び、p-n接合における光検出を目指した。
電解質を用いた電気二重層トランジスタを作製し、原子層にキャリアを蓄積することでp-n接合を形成し、そこで光検出できることを示した。本成果は、酸化グラフェン中でもp-n接合を形成し電界発光へと応用するための足がかりとなる。また異なる原子層を重ねて原子層ヘテロ構造を作製することで、これまで報告されてきた層間の電荷移動だけでなく、エネルギー移動も起こり得ることを明らかにした。原子層間でのキャリアやエネルギー輸送の機構を明らかにすることで、デバイス構造の指針となり得る。

Research Progress Status

翌年度、交付申請を辞退するため、記入しない。

Strategy for Future Research Activity

翌年度、交付申請を辞退するため、記入しない。

Research Products

• [Int'l Joint Research] Massachusetts Institute of Technology(米国)
  • Country Name: U.S.A.
  • Counterpart Institution: Massachusetts Institute of Technology
  • # of Other Institutions: 1
• [Int'l Joint Research] National University of Singapore(シンガポール)
  • Country Name: SINGAPORE
  • Counterpart Institution: National University of Singapore
  • # of Other Institutions: 1
• [Int'l Joint Research] King Abdullah University Sci. & Tech.(サウジアラビア)
  • Country Name: SAUDI ARABIA
  • Counterpart Institution: King Abdullah University Sci. & Tech.
  • # of Other Institutions: 1
• [Int'l Joint Research] Imperial College London(英国)
  • Country Name: UNITED KINGDOM
  • Counterpart Institution: Imperial College London
  • # of Other Institutions: 1
• [Journal Article] A Study of Bilayer Phosphorene Stability under MoS2-Passivation (2017)
  • Author(s): Youngwoo Son, Daichi Kozawa, Albert Tianxiang Liu, Volodymyr B. Koman, Qing Hua Wang, Michael S. Strano
  • Journal Title: 2D Materials Volume: 印刷中 Pages: 印刷中
  • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] Evidence for Fast Interlayer Energy Transfer in MoSe2/WS2 Heterostructures (2016)
  • Author(s): D. Kozawa, A. Carvalho, I. Verzhbitskiy, F. Giustiniano, Y. Miyauchi, S. Mouri, A.H.C. Neto, K. Matsuda, G. Eda
  • Journal Title: Nano Letters Volume: 16 Pages: 4087-4093
  • DOI: 10.1021/acs.nanolett.6b00801
  • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] Photodetection in p-n junctions formed by electrolyte-gated transistors of two- dimensional crystals (2016)
  • Author(s): D. Kozawa, J. Pu, R. Shimizu, S. Kimura, M.-H. Chiu, K. Matsuki, Y. Wada, T. Sakanoue, Y. Iwasa, L.-J. Li, T. Takenobu
  • Journal Title: Applied Physics Letters Volume: 109 Pages: 201107
  • DOI: 10.1063/1.4967173
  • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] Exciton-Plasmon Coupling and Electromagnetically Induced Transparency in Monolayer Semiconductors Hybridized with Ag Nanoparticles (2016)
  • Author(s): W. Zhao, S. Wang, B. Liu, I. Verzhbitskiy, S. Li, F. Giustiniano, D. Kozawa, K.P. Loh, K. Matsuda, K. Okamoto, R.F. Oulton, G. Eda
  • Journal Title: Advanced Materials Volume: 28 Pages: 2709-2715
  • DOI: 10.1002/adma.201504478
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Effects of electrolyte gating on photoluminescence spectra of large-area WSe2 monolayer films (2016)
  • Author(s): K. Matsuki, J. Pu, D. Kozawa, K. Matsuda, L.J. Li, T. Takenobu
  • Journal Title: Japanese Journal of Applied Physics Volume: 55 Pages: 06GB02
  • DOI: 10.7567/jjap.55.06gb02
  • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
• [Presentation] Observation of Switchable Photoresponse of a Monolayer WSe2-MoS2 Lateral Heterostructure Via Photocurrent Spectral Atomic Force Microscopic Imaging (2016)
  • Author(s): D. Kozawa, Y. Son, M-Y Li, C-C Cheng, K-H Wei, P. Liu, Q.H. Wang, L-J Li, M.S. Strano
  • Organizer: MRS Fall 2016
  • Place of Presentation: Hynes Convention Center, Boston, MA, USA
  • Year and Date: 2016-11-30
  • Int'l Joint Research
• [Presentation] MoS2-Passivated Bilayer Phosphorene Phototransistors (2016)
  • Author(s): D. Kozawa, Y. Son, A.T. Liu, V. Koman, Q.H. Wang, M.S. Strano
  • Organizer: MRS Fall 2016
  • Place of Presentation: Hynes Convention Center, Boston, MA, USA
  • Year and Date: 2016-11-28
  • Int'l Joint Research
• [Presentation] MoS2-Passivated Bilayer Phosphorene Phototransistors (2016)
  • Author(s): D. Kozawa, Y. Son, A.T. Liu, V. Koman, Q.H. Wang, M.S. Strano
  • Organizer: 2016 AIChE Annual Meeting
  • Place of Presentation: Hilton San Francisco Union Square, San Francisco, CA, USA
  • Year and Date: 2016-11-14
  • Int'l Joint Research
• [Presentation] Observation of Switchable Photoresponse of a Monolayer WSe2-MoS2 Lateral Heterostructure Via Photocurrent Spectral Atomic Force Microscopic Imaging (2016)
  • Author(s): D. Kozawa, Y. Son, M-Y Li, C-C Cheng, K-H Wei, P. Liu, Q.H. Wang, L-J Li, M.S. Strano
  • Organizer: 2016 AIChE Annual Meeting
  • Place of Presentation: Hilton San Francisco Union Square, San Francisco, CA, USA
  • Year and Date: 2016-11-14
  • Int'l Joint Research
• [Presentation] Observation of switchable photoresponse of a monolayer WSe2-MoS2 lateral heterostructure via photocurrent spectral atomic force microscopic imaging (2016)
  • Author(s): D. Kozawa, Y. Son, M-Y Li, C-C Cheng, K-H Wei, P. Liu, Q.H. Wang, L-J Li, M.S. Strano
  • Organizer: ACS National Meeting
  • Place of Presentation: Pennsylvania Convention Center, Philadelphia, PA, USA
  • Year and Date: 2016-08-24
  • Int'l Joint Research
• [Remarks] 小澤大知
  • URL: http://daichikozawa-jp.blogspot.com/
• [Remarks] Daichi Kozawa
  • URL: http://daichikozawa.blogspot.com/