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Characterization of optical and thermal properties of chalcopyrite compound semiconductors by photoacoustic spectroscopy

Research Project

Project/Area Number 06650377
Research Category

Grant-in-Aid for General Scientific Research (C)

Allocation TypeSingle-year Grants
Research Field Electronic materials/Electric materials
Research InstitutionNagaoka College of Technology

Principal Investigator

MOROHASHI Makoto  Nagaoka College of Technology, Associate Professor, 電気工学科, 助教授 (90174474)

Co-Investigator(Kenkyū-buntansha) OKA Tekefumi  Nagaoka College of Technology, Professor, 電気工学科, 教授 (60124004)
Project Period (FY) 1994 – 1995
Project Status Completed (Fiscal Year 1995)
Budget Amount *help
¥2,000,000 (Direct Cost: ¥2,000,000)
Fiscal Year 1995: ¥300,000 (Direct Cost: ¥300,000)
Fiscal Year 1994: ¥1,700,000 (Direct Cost: ¥1,700,000)
KeywordsPhotoasoustic Spectroscopy / Multinary Compounds / Thermal Diffusivity / Chalcopyrite / Photothermal phenomena
Research Abstract

In this research project, we have investigated an application of photoacoustic spectroscopy to characterization of optical and thermal properties of multinary compound semiconductors. We employed a gas-microphone method as a measurement method, and analyzed the conditions to evaluate the optical absorption coefficients and the thermal diffusivities of these materials. Following results are obtained.
1. In the case of using plate type CdS specimen having the thickness less than 2mm, we have good agreement between experimental results and theoretical ones based on the RG theory. For the specimens having thickness larger than 2mm, the difference between the experimental results and the theoretical ones was observed.
2. A better technique for the measurements of the photoacoustic spectra of powders was investigated. The dilution method where a powder to be measured is diluted in a transparent matrix powder is found to be better than that with an undiluted powder sample. By means of the theory including sounds coming from the inside parts of the specimen, we have found a good agreement of the theoretical results with the experimental results. To compare with the PA signal of carbon specimen, the optical absorption coefficients of powdered materials were obtained.
3. Photoacoustic spectra of CuGaS_2, TlGaSe_2, TlInS_2 were investigated in conjunction with photoconductivity spectra and transmission spectra of these semiconductors.

Report

(3 results)
  • 1995 Annual Research Report   Final Research Report Summary
  • 1994 Annual Research Report
  • Research Products

    (6 results)

All Other

All Publications (6 results)

  • [Publications] M. Morohashi, N. Mamedov, and S. Iida: "Temperture Behavior of Photoconductivity in TlGaSe_2 Layered Compounds" Jornal of Crystal Research Technology, in Press. (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] N. Mamedov, M. Morohashi, H. Uchiki, and S. Iida: "Exciton States in Layered III-III-VI(2) Compounds with Incommensulate Phase" Jornal of Crystal Research Technology, in Press. (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] M.Morohashi, N.Mamedov, and S.Iida: "Temperature Behavior of Photoconductivity in TlGaSe_2 Layred Compounds" Journal of Crystal Research Technology. (in press). (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] N.Mamedov, M.Morohashi, H.Uchiki, and S.Iida: "Exciton State in Layred III-III-VI (2) Compounds with Incommensurate Phase" Journal of Crystal Research Technology. (in press). (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] M.Morohashi,N.Mamedov,and S.Iida: "Temperature Behavior of Photoconductivity in TlGaSe_3 Layered Compounds" Pcoceedings of ICTMC-10. (掲載予定).

    • Related Report
      1995 Annual Research Report
  • [Publications] N.Mamedov,M.Morohashi,H.Uchiki,and S.Iida: "Exciton States in Layered III-III-VI(2)Compounds with Incommensutate Phase" Pcoceedings of ICTMC-10. (掲載予定).

    • Related Report
      1995 Annual Research Report

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Published: 1994-04-01   Modified: 2016-04-21  

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