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DISORDERED SUPERLATTICES

Research Project

Project/Area Number 04452175
Research Category

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

Allocation TypeSingle-year Grants
Research Field 電子材料工学
Research InstitutionKYOTO UNIVERSITY

Principal Investigator

SASAKI Akio  KYOTO UNIV., DEPT.OF ELEC.ENGRG., PROFESSOR, 工学部, 教授 (10025900)

Co-Investigator(Kenkyū-buntansha) WAKAHARA Akihiro  KYOTO UNIV., DEPT.OF ELEC.ENGRG., ASSIST.PROFESSOR, 工学部, 助手 (00230912)
野田 進  京都大学, 工学部, 助教授 (10208358)
Project Period (FY) 1992 – 1993
Project Status Completed (Fiscal Year 1993)
Budget Amount *help
¥6,700,000 (Direct Cost: ¥6,700,000)
Fiscal Year 1993: ¥2,800,000 (Direct Cost: ¥2,800,000)
Fiscal Year 1992: ¥3,900,000 (Direct Cost: ¥3,900,000)
Keywordssuper lattice / luminescence / disoredering / III-V semiconductors / silicon・germanium / localized level / 不規則超格子 / AlP / GaP / AlAs / GaAs / SiGe / Si / 光励起発光特性 / 電流注入発光特性 / 不規則結晶半導体 / AlGaP / AlGaAs / 局在準位 / 有機金属気相成長法 / 有機V族
Research Abstract

A new semiconductor was proposed in 1989 which is featured by showing both the amorphous-like and the single-crystal-like properties. The proposed semiconducting materials are constructed either artificially or naturally so that chemical composition is disordered but physical alignment is sufficiently ordered for epitaxial growth to be possible. A disordered superlattice (d-SL) is an example of the proposed semiconductors. It was fabricated by changing individual layr widths disorderely in AlAs/GaAs superlattice. New optical and luminescence properties have been experimentally demonstrated in previous studies.
In this study, the d-SLs of Al_xGa_<1-x>As/GaAs, AlAs/Al_yGa_<1-y>As, AlP/GaP,and Si_<1-x>Ge_x/Si were fabricated. The following new properties have been observed.
(1) The luminescence intensity of the d-SL decays less with increasing temperature as compared with that of the ordered superlattice (o-SL) and the bulk alloy (b-AL) with the same chemical composition as the d-SL.The dis … More ordering effects were investigated with changing the Al composition, i.e., the energy band difference.
(2) The effects depend proportionally on the band difference and thus become maximum at the AlAs/GaAs d-SL.
(3) A good quality of the interface between AlP and GaP was obtained with using tertialybutylphosphine aand etching GaP substrate in (NH_4) S_x.
(4) Photoluminescence (PL) intensities from the AlP/GaP d-SLs are 110-150 times stronger than those from the o-SLs and the b-AL at 9K.
(5) PL intensities from the Si_<0.76>Ge_<0.24>/Si are several times stronger than those from the o-SLs and the b-AL at 10K.These results show that artificial disordering enhances effectively luminescent capability of the indirect-transition type of semiconductors such as AlP,GaP,Si, and Ge.
The disordered effects were not satisfactorily created, since a large band difference cannot be taken due to the lattice mismatch. This would be improved with surfactan epitaxy. The d-SLs will be applied to luminescence devices in the further study. Less

Report

(3 results)
  • 1993 Annual Research Report   Final Research Report Summary
  • 1992 Annual Research Report
  • Research Products

    (18 results)

All Other

All Publications (18 results)

  • [Publications] X-Y Wang.: "Strong PL from AlP/GaP Disordered Superlattice Grown by Atmospheric Pressure OMVPE Using TBP" Appl.Phys.Lett.62. 888-890 (1993)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] 佐々木昭夫: "不規則超格子-その新しい物性-" 応用物理. 62. 151-154 (1993)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] A.Wakahara,: "Photoluminescence Properties of Si_<1-x>Ge_x/Si Disorered Superlattices" Appl.Phys.Lett.64. 1850-1852 (1993)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] A.Sasaki,: "Sci.& Tech.of Mesoscopic Structures ed.by S.Namba,C.Hamaguchi,and T.Ando" Luminescence Properties of Disordered Superlattices,Springer-Verlag, 385-391 (1992)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] K.Uno,: "Inst.Phys.Conf.Ser.No129" Temperature Dependence of PL Properties of AlAs/Al_xGa_<1-x>As and Al_yGa_<1-y>As/GaAs Disordered Superlattices,Inst.Phys., 241-246 (1992)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] HA X-L.Wang,: "Inst.Phys.Conf.Ser.No129" Photoluminescence Properties of AlP/GaP Superlattices Grown by OMVPE Using TBP,Inst.Phys., 417-422 (1992)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] X-L Wang: ""Strong PL from AlP/GaP Disordered Superlattice Grown by Atmospheric Pressure OMVPE Using TBP"" Appl.Phys.Lett.Vol.62, No.8. 888-890 (1993)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] A.Wakahara: ""Photoluminescence Properties of Si_<1-x>Ge_x/Si Disorered Superlattices"" Appl.Phys.Lett.Vol.64, No.4. 1850-1852 (1993)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] A.Sasaki: ""Luminescence Properties of Disordered Superlattices"" Sci.& Tech.of Mesoscopic Structures, ed.by S.Namba, C.Hamaguchi, and T.Ando Springer-Verlag. (1992)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] K.Uno: ""Temperature Dependence of PL Properties of AlAs/Al_xGa_<1-x>As and Al_yGa_<1-y>As/GaAs Disordered Superlattices"" Inst.Phys.Conf.Ser.No129, Inst.Phys.(1992)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] X-L.Wang: ""Photoluminescence Properties of AlP/GaP Superlattices Grown by OMVPE Using TBP"" Inst.Phys.Conf.Ser.No.129, Inst.Phys.(1992)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] A.Wakahara,T.Hasegawa,K.Kuramoto,K.K.Vong,and A.Sasaki: "Photoluminescence properties of Si_<1-X>Ge_X/Si disordered superlattice" Appl.Phys.Lett.64(印刷中). (1994)

    • Related Report
      1993 Annual Research Report
  • [Publications] Xue-Lun WANG,Akihiro WAKAHARA,and Akio SASAKI: "Strong Photoluminescence from AlP/GaP Disordered Superlattice Grown by Atmospheric Pressure Organometallic Vapor Phase Epitaxy Using Tertiarybutylphosphine" Appl.Phys.Lett.62. 888-890 (1993)

    • Related Report
      1993 Annual Research Report
  • [Publications] A.Sasaki,X.L.Wang,and A.Wakahara: "Enhanced Electroluminescence of AlP/GaP Disordered Superlattice" Appl.Phys.Lett.(印刷中). (1993)

    • Related Report
      1993 Annual Research Report
  • [Publications] A.Wakahara,X.L.Wang,and A.Sasaki: "OMVPE Growth of AlP/GaP Superlatties Using Tertiarybuthlphosphine as a phosphorus source" J.Crystal Growth. 124. 118-122 (1992)

    • Related Report
      1992 Annual Research Report
  • [Publications] X.L.Wang,A.Wakahara,and A.Sasaki: "Strong Photoluminescence from AlP/GaP Disordered Superlattice grown by Atmospheric Pressure Organometallic Vapon Phase Epitaxy Using Tertiarybutylphosphine" Appl.Phys.Lett.62. 888-890 (1993)

    • Related Report
      1992 Annual Research Report
  • [Publications] 佐々木 昭夫: "不規則超格子ーその新しい物性ー" 応用物理. 62. 151-154 (1993)

    • Related Report
      1992 Annual Research Report
  • [Publications] X.L.Wang,A.Wakahara,and A.Sasaki: "OMVPE Growth and charaterization of Al_XGa_<1-X> (0≦X≦1) Using Tertiarybutylphosphine" J.Crystal Growth. (1993)

    • Related Report
      1992 Annual Research Report

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Published: 1992-04-01   Modified: 2016-04-21  

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