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

• Project/Area Number: 15J07423
• Research Category: Grant-in-Aid for JSPS Fellows
• Allocation Type: Single-year Grants
• Section: 国内
• Research Field: Nanomaterials chemistry
• Research Institution: Nagoya University (2016); Waseda University (2015)
• 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
• Project Status: Completed (Fiscal Year 2016)
• Budget Amount: ¥2,990,000 (Direct Cost: ¥2,300,000、Indirect Cost: ¥690,000); Fiscal Year 2016: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000); Fiscal Year 2015: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
• Keywords: 原子層 / 電界発光 / 電気二重層トランジスタ / ナノカーボン / オプトエレクトロニクス

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)
• [Int'l Joint Research] National University of Singapore(シンガポール)
• [Int'l Joint Research] King Abdullah University Sci. & Tech.(サウジアラビア)
• [Int'l Joint Research] Imperial College London(英国)
• [Int'l Joint Research] National University of Singapore(シンガポール)
• [Int'l Joint Research] KAUST(サウジアラビア)
• [Int'l Joint Research] Massachusetts Institute of Technologyz(米国)
• [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
  • 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. Castro Neto, K. Matsuda, and G. Eda
  • Journal Title: Nano letters Volume: 16 Issue: 7 Pages: 4087-4093
  • DOI: 10.1021/acs.nanolett.6b00801
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Photodetection in p-n junctions formed by electrolyte-gated transistors of two-dimensional crystals (2016)
  • Author(s): Daichi Kozawa, Jiang Pu, Ryo Shimizu, Shota Kimura, Ming-Hui Chiu, Keiichiro Matsuki, Yoshifumi Wada, Tomo Sakanoue, Yoshihiro Iwasa, Lain-Jong Li, Taishi Takenobu
  • Journal Title: Appl. Phys. Lett. Volume: 109 Issue: 20 Pages: 201107-201107
  • DOI: 10.1063/1.4967173
  • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] Exciton-plasmon coupling and electromagnetically induced transparency in monolayer semiconductor hybridized with Ag nanoparticels (2016)
  • Author(s): W. Zhao, S. Wang, B. Liu, I. Verzhbitskiy, S. Li, F. Giustiano, D. Kozawa, K. P. Loh, K. Matsuda, K. Okamoto, R. F. Oulton, and G. Eda
  • Journal Title: Adv. Mat. Volume: 28 Issue: 14 Pages: 2709-2715
  • DOI: 10.1002/adma.201504478
  • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] Effects of electrolyte gating on photoluminescence spectra of large-area WSe2 monolayer films (2016)
  • Author(s): Keiichiro Matsuki, Jiang Pu, Daichi Kozawa, Kazunari Matsuda, Lain-Jong Li, Taishi Takenobu
  • Journal Title: Japanese Journal of Applied Physics Volume: 55 Issue: 6S1 Pages: 06GB02-06GB02
  • DOI: 10.7567/jjap.55.06gb02
  • NAID: 210000146605
  • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] Effects of electrolyte gating on photoluminescence spectra of large-area WSe2 monolayer films (2016)
  • Author(s): Keiichiro Matsuki, Jiang Pu, Daichi Kozawa, Kazunari Matsuda, Lain-Jong Li, and Taishi Takenobu
  • Journal Title: Japanese Journal of Applied Physics Volume: 55
  • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] Enhanced photovoltaic performances of graphene/Si solar cells by insertion of MoS2 thin film (2015)
  • Author(s): Y. Tsuboi, F.Wang, D. Kozawa, K. Funahashi, S. Mouri, Y. Miyauchi, T. Takenobu, K. Matsuda
  • Journal Title: Nanoscale Volume: 7 Issue: 34 Pages: 14476-14482
  • DOI: 10.1039/c5nr03046c
  • Peer Reviewed / Open Access / 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
• [Presentation] Resonant dipole-dipole energy transfer in van der Waals heterostructures (2016)
  • Author(s): Daichi Kozawa, Alexandra Carvalho, Ivan Verzhbitskiy, Francesco Giustiniano, Yuhei Miyauchi, Shinichiro Mouri, Antonio Castro Neto, Kazunari Matsuda, Goki Eda
  • Organizer: 2016 MRS Spring Meeting & Exhibit
  • Place of Presentation: Phoenix Convention Center, Arizona, USA
  • Year and Date: 2016-03-28
  • Int'l Joint Research
• [Presentation] 原子層ヘテロ構造における蛍光共鳴エネルギー移動の観測 (2016)
  • Author(s): 小澤大知, Alexandra Carvalho, Ivan Verzhbitskiy, Francesco Giustiniano, 宮内雄平, 毛利真一郎, A. H. Castro Neto, 松田一成, 江田剛輝
  • Organizer: 日本物理学会 第71回年次大会
  • Place of Presentation: 東北学院大学泉キャンパス
  • Year and Date: 2016-03-19
• [Remarks] 小澤大知
  • URL: http://daichikozawa-jp.blogspot.com/
• [Remarks] Daichi Kozawa
  • URL: http://daichikozawa.blogspot.com/
• [Remarks] Daichi Kozawa 個人ページ
  • URL: http://daichikozawa.blogspot.com/
• [Remarks] 小澤 大知 個人ページ
  • URL: http://daichikozawa-jp.blogspot.com/
• [Remarks] 竹延 研究室ホームページ
  • URL: http://www.f.waseda.jp/takenobu/