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Product and Thermoelectric Properties of Thermoelectric Materials with Mesoscopic Structure

Research Project

Project/Area Number 15560050
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Engineering fundamentals
Research InstitutionJapan Advanced Institute of Science and Technology

Principal Investigator

IWASAKI Hideo  Japan Advanced Institute of Science and Technology, School of Materials Science, Associate Professor, 材料科学研究科, 助教授 (70168558)

Co-Investigator(Kenkyū-buntansha) KOYANO Mikio  Japan Advanced Institute of Science and Technology, School of Materials Science, Associate Professor, 材料科学研究科, 助教授 (60195873)
NAITO Tomoyuki  Japan Advanced Institute of Science and Technology, School of Materials Science, Research Associate, 材料科学研究科, 助手 (40311683)
Project Period (FY) 2003 – 2005
Project Status Completed (Fiscal Year 2005)
Budget Amount *help
¥3,200,000 (Direct Cost: ¥3,200,000)
Fiscal Year 2005: ¥500,000 (Direct Cost: ¥500,000)
Fiscal Year 2004: ¥600,000 (Direct Cost: ¥600,000)
Fiscal Year 2003: ¥2,100,000 (Direct Cost: ¥2,100,000)
KeywordsThermoelectric Device / Figure of Merit / Harman Method / Non-equilibrium State / Electron Temperature / Lattice Temperature / 非平衡-非線形熱電物性
Research Abstract

We can have two important results in this research. The first is the observation of non-equilibrium stationary state between the electron and lattice systems in thermoelectric materials. Typical thermoelectric phenomenon, The Peltier effect is incarnated by only the electron system and the lattice system is warmed up through the thermal interaction between both systems. The electrons are coercively carried by the applied electric field. Furthermore, the Peltier heat is continuously reproduced during the impression of dc current. Therefore, non-equilibrium stationary state could appear between the electron and lattice systems. We tried to measure the electron and lattice temperatures, using the developed equipment in this grant and could confirm that the non-equilibrium phenomenon between the electron and lattice systems was surely caused by the Peltier effect. The second is improvement of the figure of merit in the Bi micro-wire array. The figure of merit is strongly enhanced to be ZT=0.287 in the micro-wire array. The obtained value is approximately 2.8 times larger than that (ZT=0.1) in the Bi bulk device. Furthermore, we could explain that the origin came from the control of the crystal axis in the array, examining the measured values of the other thermoelectric physical quantities. In this grant we developed the evaluation equipment by the Harman method and some important results such as the non-equilibrium stationary state between the electron and lattice systems and the improvement of the figure of merit in the Bi micro-wire array.

Report

(4 results)
  • 2005 Annual Research Report   Final Research Report Summary
  • 2004 Annual Research Report
  • 2003 Annual Research Report
  • Research Products

    (18 results)

All 2006 2005 2004 Other

All Journal Article (15 results) Publications (3 results)

  • [Journal Article] High Efficiency in Thermoelectric Materials by Device Size Control2006

    • Author(s)
      H.Iwasaki, M.Koyano, Y.Yamamura, H.Hori
    • Journal Title

      Proc. 23^<rd> Int. Conf. on thermoelectric (ICT2004)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Fabrication of Equipment for Evaluating ZT by Harman Method2006

    • Author(s)
      H.Iwasaki, M.Koyano, H.Hori
    • Journal Title

      Proc. 23^<rd> Int. Conf. on thermoelectric (ICT2004)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] High Efficiency in Thermoelectric Materials by Device Size Control2006

    • Author(s)
      H.Iwasaki, M.Koyano, Y.Yamamura, H.Hori
    • Journal Title

      Proc.23^<rd> Int.Conf.on thermoelectric (ICT2004)

    • Related Report
      2005 Annual Research Report
  • [Journal Article] Fabrication of Equipment for Evaluating ZT by Harman Method2006

    • Author(s)
      H.Iwasaki, M.Koyano, H.Hori
    • Journal Title

      Proc.23^<rd> Int.Conf.on thermoelectric (ICT2004)

    • Related Report
      2005 Annual Research Report
  • [Journal Article] Thermoelectric Property Measurements by the Improved Harman Method2006

    • Author(s)
      H.Iwasaki, H.Hori
    • Journal Title

      Proc.24^<th> Int.Conf.on thermoelectric (ICT2005)

      Pages: 498-501

    • Related Report
      2005 Annual Research Report
  • [Journal Article] Non-equilibrium Phenomenon between Electron and Lattice Systems Induced by the Peltier Effect2005

    • Author(s)
      H.Iwasaki, H.Hori, S.Sasaki
    • Journal Title

      Jpn. J. Appl. Phys. 44・36

    • NAID

      130004766230

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Thermoelectric Property Measurements by the Improved Harman Method2005

    • Author(s)
      H.Iwasaki, H.Hori
    • Journal Title

      Proc. 24^<th> Int. Conf. on thermoelectric (ICT2005)

      Pages: 498-451

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Non-equilibrium Phenomenon between Electron and Lattice Systems Induced by the Peltier Effect2005

    • Author(s)
      H.Iwasaki, H.Hori, S.Sasaki
    • Journal Title

      Jpn.J.Appl.Phys. 44-36

    • NAID

      130004766230

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] High Efficiency in Thermoelectric Materials by Device Size Control2005

    • Author(s)
      H.Iwasaki, M.Koyano, Y.Yamamura, H.Hori
    • Journal Title

      Proc.23^<rd> Int.Conf.on Thermoelectrics

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Fabrication of Equipment for Evaluating ZT by Harman Method2005

    • Author(s)
      H.Iwasaki, M.Koyano, H.Hori
    • Journal Title

      Proc.23^<rd> Int.Conf.on Thermoelectrics

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Thermoelectric Property Measurements by the Improved Harman Method2005

    • Author(s)
      H.Iwasaki, H.Hori
    • Journal Title

      Proc.24^<th> Int.Conf.on Thermoelectrics

      Pages: 498-451

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Non-equilibrium Phenomenon between Electron and Lattice Systems Induced by the Peltier Effect2005

    • Author(s)
      H.Iwasaki, H.Hori, S.Sasaki
    • Journal Title

      Jpn.J.Appl.Phys. 44・36

    • NAID

      130004766230

    • Related Report
      2005 Annual Research Report
  • [Journal Article] High Efficiency in Thermoelectric Materials by Device Size Control2005

    • Author(s)
      H.Iwasaki, M.Koyano, Y.Yamamura, H.Hori
    • Journal Title

      Proc.Int.Conf.on thermoelectric(ICT2004) in press

    • Related Report
      2004 Annual Research Report
  • [Journal Article] Fabrication of Equipment for Evaluating ZT by Harman Method2005

    • Author(s)
      H.Iwasaki, M.Koyano, H.Hori
    • Journal Title

      Proc.Int.Conf.on thermoelectric(ICT2004) in press

    • Related Report
      2004 Annual Research Report
  • [Journal Article] Non-equilibrium and non-liner stationary state in thermoelectric materials2004

    • Author(s)
      H.Iwasaki, m.Koyano, H.Hori
    • Journal Title

      Solid State Communications 130

      Pages: 507-510

    • Related Report
      2004 Annual Research Report
  • [Publications] 岩崎秀夫, 小矢野幹夫, 堀秀信: "ハーマン法による熱電材料の物生測定"固体物理. 38巻・12号. 871-879 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] H.Iwasaki, A.Ohishi, T.Kajihara, S.Sano: "Control of the figure of merit by the anti-site defect in Thermoelectric materials (Bi,Sb)2Te3"Japanese Journal Applied Phisics. 42巻・9A号. 5477-5479 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] H.Iwasaki, M.Koyano, Y.Yamamura, H.Hori: "Non-equilibrium and non-linear stationary state in thermoelectric meterials"Solid State Communications. (in press).

    • Related Report
      2003 Annual Research Report

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Published: 2003-04-01   Modified: 2016-04-21  

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