• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to project page

2008 Fiscal Year Annual Research Report

高In組成InGaNおよび高Al組成AlGaNの輻射・非輻射再結合過程の解明と制御

Planned Research

Project AreaOptoelectronics Frontier by Nitride Semiconductor -Ultimate Utilization of Nitride Semiconductor Material Potential-
Project/Area Number 18069007
Research InstitutionKyoto University

Principal Investigator

川上 養一  Kyoto University, 工学研究科, 教授 (30214604)

Co-Investigator(Kenkyū-buntansha) 船戸 充  京都大学, 工学研究科, 准教授 (70240827)
KeywordsAlGaN / 発光マッピング / 輻射再結合 / 非輻射再結合 / 深紫外発光 / 偏光異方性 / Modified MEE法 / 高品質エピ膜
Research Abstract

本年度は、AlリッチAlGaN系構造における(1)Modified MEE法による高品質AlNエピ膜の成長、
(2)AlGaN/AlN量子井戸からの深紫外域高効率フォトルミネッセンス(PL)、(3)上記の深紫外PLの歪や量子効果依存性について成果があった。具体的には、以下の通りである。
(1)有機金属気相成長(MOVPE)において、III族原料(TMAとTMG)とV族原料(NH3)の同時供給と交互供給を周期的に繰り返すModified MEE法を開発し、サファイア基板(0001)面上に高品質AlNおよびAlリッチAlGaNを成長した。AlNエピ膜,(膜厚 : 600nm、基盤温度 : 1200度)は原子レベルで平坦な表面を持ち、X線回折半値幅は(0002)対称ωスキャンで43秒、(10-12)非対称ωスキャンで250秒と非常に狭い線幅を示した。
(2)高品質AlNエピ膜テンプレート上に高Al組成AlGaN/AlN量子井戸構造をコヒーレント成長し、220〜260nm域の深紫外域において室温PLを実現し、最高内部量子効率として約30%を実現した。
(3)AlGaN/AlN量子井戸のAl組成を91%から69%と減少させたとき、Al組成82%において、偏光方向が[0001]軸平行から垂直にスイッチすることがわかった。これは、従来予想されていた臨界Al組成60%よりも大きい。この効果は、CHバンドの正孔の質量は, HHバンドのそれに比べて著しく軽く(0.26mO vs. 3.57mO)、AlGaN井戸に加わった三角ポテンシャル(自発分極による)による量子閉じ込め効果によって、バンドの入れ替わりが生じやすくなったために生じることが明らかにされた。

  • Research Products

    (30 results)

All 2009 2008 2007

All Journal Article (6 results) (of which Peer Reviewed: 6 results) Presentation (22 results) Book (2 results)

  • [Journal Article] Excitonic properties of polar, semipolar, and nonpolar InGaN/GaN strained quantum wells with potential fluctuations2008

    • Author(s)
      M. Funato and Y. Kawakami
    • Journal Title

      Journal of Applied Physics 103

      Pages: 093501/1-7

    • Peer Reviewed
  • [Journal Article] Nanoscopic recombination processes InGaN/GaN quantum wells emitting violet, blue, and green spectra2008

    • Author(s)
      A. Kaneta, M. Funato and Y. Kawakami
    • Journal Title

      Physical Review B 78

      Pages: 125317/1-7

    • Peer Reviewed
  • [Journal Article] Polarization switching phenomena in semipolar In_xGa_<1-x>N/GaN quantum well active layers2008

    • Author(s)
      M. Ueda, M. Funato, K. Kojima, Y. Kawakami, Y. Narukawa and T. Mukai
    • Journal Title

      Physical Review B 78

      Pages: 233303/1-4

    • Peer Reviewed
  • [Journal Article] Monolithic polychromatic light-emitting diodes based on InGaN microfacet quantum wells toward tailor-made solid-state lighting2008

    • Author(s)
      M. Funato, T. Kondou, K. Hayashi, S. Nishiura, M. Ueda, Y. Kawakami, Y. Narukawa and T. Mukai
    • Journal Title

      Applied Physics Express 1

      Pages: 011106/1-3

    • Peer Reviewed
  • [Journal Article] Initial nucleation of AIN grown directly on sapphire substrates by metal-organic vapor phase epitaxy2008

    • Author(s)
      R. G. Banal, M. Funato and Y. Kawakami
    • Journal Title

      Applied Physics Letters 92

      Pages: 241905/1-3

    • Peer Reviewed
  • [Journal Article] Emission color tunable light-emitting diodes composed of InGaN multifacet quantum wells2008

    • Author(s)
      M. Funato, K. Hayashi, M. Ueda, Y. Kawakami, Y. Narukawa and T. Mukai
    • Journal Title

      Applied Physics Letters 93

      Pages: 021126/1-3

    • Peer Reviewed
  • [Presentation] Positive biexciton binding energy confined in a localized center formed in a single InGaN/GaN auantum disk2009

    • Author(s)
      Richard Bardoux, Akio Kaneta, M. Funato, Y. Kawakami, Akihiko Kikuchi and Katsumi Kishino
    • Organizer
      JSAP the 56th Spring Meeting
    • Place of Presentation
      茨城県つくば市
    • Year and Date
      2009-03-31
  • [Presentation] 非c面窒化物半導体量子井戸における価電子帯有効質量2009

    • Author(s)
      小島一信, 船戸充, 川上養一, 野田進
    • Organizer
      第56回応用物理学会関係連合講演会
    • Place of Presentation
      茨城県つくば市
    • Year and Date
      2009-03-30
  • [Presentation] 極性{11-22}IhGaN/GaN量子井戸における発光の空間分布2009

    • Author(s)
      上田雅也, 金田昭男, 船戸充, 川上養一
    • Organizer
      第56回応用物理学会関係連合講演会
    • Place of Presentation
      茨城県つくば市
    • Year and Date
      2009-03-30
  • [Presentation] 半極性{11-22}GaNバルク基板への厚膜InGaNの成長2009

    • Author(s)
      井上大輔, 上田雅也, 船戸充, 川上養一
    • Organizer
      第56回応用物理学会関係連合講演会
    • Place of Presentation
      茨城県つくば市
    • Year and Date
      2009-03-30
  • [Presentation] Characterization and Control of Recombination Dynamics in Low-dimensional InGaN-based Semiconductors2009

    • Author(s)
      Y. Kawakami, A. Kaneta, M. Ueda, and M. Funato
    • Organizer
      DPG Spring Meeting (Invited)
    • Place of Presentation
      Dresden, Germany
    • Year and Date
      2009-03-24
  • [Presentation] Multi-color light-emitting diodes based on GaN micro-structures2009

    • Author(s)
      M. Funato, Y. Kawakami, Y. Narukawa and T. Muksi
    • Organizer
      SPIE Photonic West (Invited)
    • Place of Presentation
      San Jose, California, USA
    • Year and Date
      2009-01-29
  • [Presentation] Monolithic Polychromatic InGaN Light-Emitting Diodes Based on Micro-facet2009

    • Author(s)
      Y. Kawakarhi and M. Funato
    • Organizer
      The 3rd Intern. Conf. on Display and Solid State Lighting (Invited)
    • Place of Presentation
      Seoul, Korea
    • Year and Date
      2009-01-21
  • [Presentation] Monolithic polychromatic InGaN light-emitting diodes based on micro-facet structures2008

    • Author(s)
      M. Funato and Y. Kawakami
    • Organizer
      Intern. Meeting on Information Display, Intern. Display Manufacturing, Conf. and Asia Display 2008 (Invited)
    • Place of Presentation
      Ilsan, Korea
    • Year and Date
      2008-10-16
  • [Presentation] Polarization anisotropy in semipolar InGaN/GaN quantum well active layers2008

    • Author(s)
      M. Ueda, M. Funato, Y. Narukawa, T. Mukai and Y. Kawakami
    • Organizer
      Intern. workshop on Nitride Semiconductors, (Invited)
    • Place of Presentation
      Montreux, Switzerland
    • Year and Date
      2008-10-09
  • [Presentation] Controlling optical anisotropy of semipolar and nonpolar InGaN auantum wells2008

    • Author(s)
      K. Kojima, M. Funato, Y. Kawakami, S. Nagahama. and T. Mukai
    • Organizer
      Intern. workshop on Nitride Semiconductors
    • Place of Presentation
      Montreux, Switzerland
    • Year and Date
      2008-10-09
  • [Presentation] Highly efficient light emission based on plasmonics2008

    • Author(s)
      K. Okamoto, A. Scherer and Y. Kawakami
    • Organizer
      2008 Japan-US Nanophotonics Seminar (Invited)
    • Place of Presentation
      Miyazaki, Japan
    • Year and Date
      2008-09-25
  • [Presentation] Deep-Ultraviolet Emission of AlGaN/AIN MQWs grown by Modified Migration Enhanced Epitaxy2008

    • Author(s)
      R. G. Banal, 船戸充, 川上養一
    • Organizer
      第69回応用物理学会学術講演会
    • Place of Presentation
      愛知県春日井市
    • Year and Date
      2008-09-04
  • [Presentation] 半極性{11-22}InGaN/GaN量子井戸における偏光ルミネッセンスの温度特性2008

    • Author(s)
      上田雅也, 船戸充, 川上養一, 成川幸男, 向井孝志
    • Organizer
      第69回応用物理学会学術講演会
    • Place of Presentation
      愛知県春日井市
    • Year and Date
      2008-09-03
  • [Presentation] プラズモニクスに基づく発光増強のメカニズム2008

    • Author(s)
      岡本晃一, 川上養一
    • Organizer
      第69回応用物理学会学術講演会
    • Place of Presentation
      愛知県春日井市
    • Year and Date
      2008-09-02
  • [Presentation] Highly Efficient Light-Emitting Devices based on Plasmonics2008

    • Author(s)
      K. Okamoto, Y. Kawakami and A. Scherer
    • Organizer
      Gordon Research Conf. on Plasmonics
    • Place of Presentation
      Tilton, NH, USA
    • Year and Date
      2008-07-30
  • [Presentation] Anisotropic stimulated emission and gain formation of non c plane InGaN laser diodes2008

    • Author(s)
      K. Kojima, M. Funato, Y. Kawakami, S. Naeahama and T. Mukai
    • Organizer
      27th Electronic Materials Symposium
    • Place of Presentation
      Izu, Japan
    • Year and Date
      2008-07-10
  • [Presentation] Structural evolution of directly-grown AIN on sapphire substrates2008

    • Author(s)
      Ryan G. Banal, M. Funato and Y. Kawakami
    • Organizer
      2nd Intern. Symp. on Growth of III-Nitrides
    • Place of Presentation
      Izu, Japan
    • Year and Date
      2008-07-07
  • [Presentation] Surface plasmon enhanced highly efficient light-emitting devices2008

    • Author(s)
      K. Okamoto, A. Scherer and Y. Kawakami
    • Organizer
      2nd Intern. Conf. on Functional materials and Devices (Invited)
    • Place of Presentation
      Kuala Lumpur, Malaysis
    • Year and Date
      2008-06-18
  • [Presentation] Characterization and Control of Recombination Dynamics in Low-dimensional InGaN-based Semiconductors2008

    • Author(s)
      Y. Kawakami, A. Kaneta, M. Funato, Y. Narukawa and T. Mukai
    • Organizer
      The 3rd Intern. Conf. Smart Materials Structures Systems (Invited)
    • Place of Presentation
      Acireale, Sicily, Italy
    • Year and Date
      2008-06-09
  • [Presentation] A New Growth Method of High-Quality AlN on Sapphire Substrates2008

    • Author(s)
      R. Banal, M. Funato and Y. Kawakami
    • Organizer
      Intern. Symp. on Semiconductor Light Emitting Devices
    • Place of Presentation
      Phoenix, USA
    • Year and Date
      2008-05-01
  • [Presentation] Anisotropic Stimulated Emission and Gain Formation of Non c Plane InGaN Laser Diodes2008

    • Author(s)
      K. Kojima, M. Funato, Y. Kawakami, S. Nagahama and T. Mukai
    • Organizer
      8th Intern. Conf. on Physics of Light-Matter Coupling in Nanostructures
    • Place of Presentation
      Tokyo, Japan
    • Year and Date
      2008-04-09
  • [Presentation] Structural evolution of AIN grown directly on-sapphire substrates by metalorganic vapor phase epitaxy2007

    • Author(s)
      R. G. Banal, M. Funato and Y. Kawakami
    • Organizer
      27th Electronic Materials Symposium
    • Place of Presentation
      Izu, Japan
    • Year and Date
      20071000
  • [Book] "Semipolar InGaN/GaN quantum wells for highly functional light emitters", Nitrides with Nonpolar Surfaces : Growth, Properties, and Devices edited by Tanya Paskova2008

    • Author(s)
      M. Funato, Y. Kawakami, Y. Narukawa and T. Mukai(分担執筆)
    • Total Pages
      385-411
    • Publisher
      WILEY-VCH Verlag GmbH & Co. KGaA
  • [Book] "Assessment and Modification of Recombination Dynamics in In_xGa_<1-x>N-Based Ouantum Wells". Advances in Light Emitting Materials, Materials Science Forum2008

    • Author(s)
      Y. Kawakami. A. Kaneta and M. Funato(分担執筆)
    • Total Pages
      249-274
    • Publisher
      Trans Tech Publications

URL: 

Published: 2010-06-11   Modified: 2016-04-21  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi