Enhancing the thermoelectric properties of low-dimensional materials

2018 Fiscal Year Annual Research Report

• Project/Area Number: 18J10151
• Research Institution: Tohoku University
• Principal Investigator: NGUYEN Tuan Hung 東北大学, 理学研究科, 特別研究員(DC2)
• Project Period (FY): 2018-04-25 – 2020-03-31
• Keywords: Thermoelectricity / DFT calculation / 2D materials

Outline of Annual Research Achievements

In the fiscal year FY2018, we theoretically investigated the thermoelectric properties of a series of two-dimensional (2D) materials such as 2D InSe and 2D tetradymites Bi2X3 (X= Te, Se, S). We have proposed a series of new mechanisms to improve the power factor and figure of merit ZT of the 2D materials. For example, the band engineering to converge the valence (or conduction) bands to achieve high valley degeneracy, which showed a strategy in designing thermoelectric materials with an extremely high power factor. The band converge is achieved in the 2D InSe and 2D tetradymites by applying strain and selecting the atom compounds, respectively. ZT also is improved by decreasing the thermal conductivity of 2D materials with heavy atomic masses.

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

• [Journal Article] Thermoelectric performance of monolayer InSe improved by convergence of multivalley bands (2019)
  • Author(s): Hung Nguyen T. 、Nugraha Ahmad R. T.、Yang Teng、Zhang Zhidong、Saito Riichiro
  • Journal Title: Journal of Applied Physics Volume: 125 Pages: 082502～082502
  • DOI: 10.1063/1.5040752
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] New two-dimensional phase of tin chalcogenides: Candidates for high-performance thermoelectric materials (2019)
  • Author(s): Dong Baojuan、Wang Zhenhai、Hung Nguyen T.、Oganov Artem R.、Yang Teng、Saito Riichiro、Zhang Zhidong
  • Journal Title: Physical Review Materials Volume: 3 Pages: 013405-1～9
  • DOI: 10.1103/PhysRevMaterials.3.013405
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Designing high-performance thermoelectrics in two-dimensional tetradymites (2019)
  • Author(s): Hung Nguyen T.、Nugraha Ahmad R.T.、Saito Riichiro
  • Journal Title: Nano Energy Volume: 58 Pages: 743～749
  • DOI: 10.1016/j.nanoen.2019.02.015
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Tunable circular dichroism and valley polarization in the modified Haldane model (2019)
  • Author(s): Vila Marc、Hung Nguyen Tuan、Roche Stephan、Saito Riichiro
  • Journal Title: Physical Review B Volume: 99 Pages: 161404(R)-1～5
  • DOI: 10.1103/PhysRevB.99.161404
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Inversion domain boundaries in MoSe2 layers (2018)
  • Author(s): Truong Quang Duc、Hung Nguyen Tuan、Nakayasu Yuta、Nayuki Keiichiro、Sasaki Yoshikazu、Murukanahally Kempaiah Devaraju、Yin Li-Chang、Tomai Takaaki、Saito Riichiro、Honma Itaru
  • Journal Title: RSC Advances Volume: 8 Pages: 33391～33397
  • DOI: 10.1039/C8RA07205A
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Presentation] Mo3S11 polymer as high capacity anion redox electrodes for sodium-ion battery (2018)
  • Author(s): Nguyen Tuan Hung
  • Organizer: ATI 2018 Nano Carbon
• [Presentation] Improving thermoelectric performance of monolayer semiconductors beyond the confinement effect (2018)
  • Author(s): Nguyen Tuan Hung
  • Organizer: 19th International Conference on the Science and Application of Nanotubes and Low-dimensional Materials
  • Int'l Joint Research
• [Presentation] Molybdenum sulfide polymer with high capacity for sodium-ion battery (2018)
  • Author(s): Nguyen Tuan Hung
  • Organizer: 9th A3 Symposium on Emerging Materials: Nanomaterials for Electronics, Energy and Environment
  • Int'l Joint Research