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Study on high efficiency light emitting based on rare earth doped widegap oxide semiconductors

Research Project

Project/Area Number 19K04492
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 21050:Electric and electronic materials-related
Research InstitutionSaga University

Principal Investigator

GUO QIXIN  佐賀大学, シンクロトロン光応用研究センター, 教授 (60243995)

Project Period (FY) 2019-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2021: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2020: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2019: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Keywords化合物半導体 / 希土類元素 / 発光特性 / ワイドギャップ
Outline of Research at the Start

本研究では、発光波長が環境温度に依存しない高輝度発光デバイスの実現を目指し、希土類元素ドープ酸化物半導体混晶薄膜の成長と希土類元素の励起機構の解明を目的としている。具体的には、パルスレーザー堆積法を用いて希土類元素ドープ酸化物半導体混晶膜の高品質成長技術を確立し、母体材料のバンドギャップと発光強度の関係を明らかにするとともに、希土類原子の結合状態、局所構造を解明する。また、シンクロトロン光による励起波長が可変なフォトルミネセンス方法を用いて、希土類元素ドープ発光のエネルギー輸送機構を解明し、高効率発光における共ドープ元素の制御方法の確立を目指す。

Outline of Final Research Achievements

We investigated the growth of rare earth doped oxide semiconductors and the excitation mechanism of the rare earth elements in order to realize high efficiency light emitting device whose emission wavelength does not depend on the environmental temperature. The Er doped oxide semiconductor films with different compositions were grown by pulsed laser deposition. The doping amount of Er was kept constant. The compositions and optical properties of the films were characterized by X-ray photoelectron spectroscopy and photoluminescence method. We found that light emission efficiency of the films increases with the increase of the bandgap. We also studied the crystal quality and optical properties of the Tm, Er, and Eu doped oxide multilayers, and demonstrated a white light emitting diode with excellent color rendering properties.

Academic Significance and Societal Importance of the Research Achievements

パルスレーザー堆積法を用いて高品質の希土類ドープ酸化物薄膜を作製し、薄膜の組成を変化させることにより、バンドギャップの制御に成功し、希土類元素の励起機構の解明に関する知見が得られたことは学術的に大きな意義がある。これにより、発光波長が環境温度に依存しない演色性に優れた白色発光ダイオードが実現され、照明やディスプレイ等に応用し、地球規模の省エネルギー化に貢献でき、社会的意義が極めて大きいと思われる。

Report

(4 results)
  • 2021 Annual Research Report   Final Research Report ( PDF )
  • 2020 Research-status Report
  • 2019 Research-status Report
  • Research Products

    (22 results)

All 2022 2021 2020 2019

All Journal Article (15 results) (of which Int'l Joint Research: 2 results,  Peer Reviewed: 15 results,  Open Access: 3 results) Presentation (7 results) (of which Int'l Joint Research: 7 results,  Invited: 6 results)

  • [Journal Article] Near-infrared light-emitting diodes based on Tm-doped Ga2O32022

    • Author(s)
      Zewei Chen, Katsuhiko Saito, Tooru Tanaka, Qixin Guo
    • Journal Title

      Journal of Luminescence

      Volume: 245 Pages: 118773-118773

    • DOI

      10.1016/j.jlumin.2022.118773

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Strong enhancement of red photoluminescence from Eu doped Ga2O3 films by thermal annealing2022

    • Author(s)
      Yafei Huang, Katsuhiko Saito, Tooru Tanaka, Qixin Guo
    • Journal Title

      Journal of Luminescence

      Volume: 246 Pages: 118858-118858

    • DOI

      10.1016/j.jlumin.2022.118858

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Pulsed laser deposition growth of ultra-wide bandgap GeO2 film and its optical properties2021

    • Author(s)
      Gaofeng Deng, Katsuhiko Saito, Tooru Tanaka, Makoto Arita, Qixin Guo
    • Journal Title

      Applied Physics Letters

      Volume: 119 Issue: 18 Pages: 182101-182101

    • DOI

      10.1063/5.0071918

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Strategy toward white LEDs based on vertically integrated rare earth doped Ga2O3 films2021

    • Author(s)
      Yafei Huang, Katsuhiko Saito, Tooru Tanaka, Qixin Guo
    • Journal Title

      Applied Physics Letters

      Volume: 119 Issue: 6 Pages: 062107-062107

    • DOI

      10.1063/5.0060066

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Low threshold voltage blue light emitting diodes based on thulium doped gallium oxides2021

    • Author(s)
      Zewei Chen, Katsuhiko Saito, Tooru Tanaka, Qixin Guo
    • Journal Title

      Applied Physics Express

      Volume: 14 Pages: 081002-081002

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Low driven voltage green electroluminescent device based on Er: Ga2O3/GaAs heterojunction2021

    • Author(s)
      Gaofeng Deng, Katsuhiko Saito, Tooru Tanaka, Qixin Guo
    • Journal Title

      Optical Materials

      Volume: 116 Pages: 111078-111078

    • DOI

      10.1016/j.optmat.2021.111078

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Low temperature growth of In2O3 films via pulsed laser deposition with oxygen plasma2021

    • Author(s)
      Chengyu Pan, Katsuhiko Saito, Tooru Tanaka, Qixin Guo
    • Journal Title

      Japanese Journal of Applied Physics

      Volume: 60 Pages: 055505-055505

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Yellow emission from vertically integrated Ga2O3 doped with Er and Eu electroluminescent film2021

    • Author(s)
      Deng Gaofeng、Huang Yafei、Chen Zewei、Pan Chengyu、Saito Katsuhiko、Tanaka Tooru、Guo Qixin
    • Journal Title

      Journal of Luminescence

      Volume: 235 Pages: 118051-118051

    • DOI

      10.1016/j.jlumin.2021.118051

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Journal Article] Epitaxial growth of (AlxGa1-x)2O3 thin films on sapphire substrates by plasma assisted pulsed laser deposition2021

    • Author(s)
      Chen Zewei、Arita Makoto、Saito Katsuhiko、Tanaka Tooru、Guo Qixin
    • Journal Title

      AIP Advances

      Volume: 11 Issue: 3 Pages: 035319-035319

    • DOI

      10.1063/5.0046237

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Improvement of sensing sensitivity based on green emissions from Er-doped (AlGa)2O3 films2021

    • Author(s)
      Deng Gaofeng、Saito Katsuhiko、Tanaka Tooru、Guo Qixin
    • Journal Title

      Journal of Luminescence

      Volume: 232 Pages: 117879-117879

    • DOI

      10.1016/j.jlumin.2020.117879

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Journal Article] Realization of red electroluminescence from Ga2O3:Eu/Si based light-emitting diodes2021

    • Author(s)
      Huang Yafei、Saito Katsuhiko、Tanaka Tooru、Guo Qixin
    • Journal Title

      Superlattices and Microstructures

      Volume: 150 Pages: 106814-106814

    • DOI

      10.1016/j.spmi.2021.106814

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Journal Article] Efficient temperature sensor based on green emissions from Er-doped β-Ga2O3 thin film2020

    • Author(s)
      Deng Gaofeng、Saito Katsuhiko、Tanaka Tooru、Guo Qixin
    • Journal Title

      AIP Advances

      Volume: 10 Issue: 10 Pages: 105227-105227

    • DOI

      10.1063/5.0020200

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Enhanced green emission from Er-doped (AlGa)2O3 films grown by pulsed laser deposition2020

    • Author(s)
      Gaofeng Deng, Fabi Zhang, Katsuhiko Saito, Tooru Tanaka, Makoto Arita, and Qixin Guo
    • Journal Title

      Japanese Journal of Applied Physics

      Volume: 59 Pages: 051007-051007

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Journal Article] Low temperature growth of (AlGa)2O3 films by oxygen radical assisted pulsed laser deposition2020

    • Author(s)
      Fabi Zhang, Congyu Hu, Makoto Arita, Katsuhiko Saito, Tooru Tanakaa, Qixin Guo
    • Journal Title

      CrystEngComm

      Volume: 22 Issue: 1 Pages: 142-146

    • DOI

      10.1039/c9ce01541h

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Low temperature growth of Ga2O3 films on sapphire substrates by plasma assisted pulsed laser deposition2019

    • Author(s)
      Congyu Hu, Fabi Zhang, Katsuhiko Saito, Tooru Tanaka, and Qixin Guo
    • Journal Title

      AIP Advances

      Volume: 9 Issue: 8

    • DOI

      10.1063/1.5118700

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] Efficient Color-tunable Emission from Rare Earth Doped Gallium Oxide Films2021

    • Author(s)
      Qixin GUO
    • Organizer
      The 10th Global Conference on Material Science and Engineering
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Low Temperature Growth and Characterization of Ultrawide Bandgap Gallium Oxide Based Semiconductors2020

    • Author(s)
      Qixin GUO
    • Organizer
      2020 International Forum on Wide Bandgap Semiconductors (IFWS 2020)
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Low Temperature Growth of Gallium Oxide Based Ultrawide Bandgap Semiconductors2020

    • Author(s)
      Qixin GUO
    • Organizer
      The 9th Global Conference on Materials Science and Engineering
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Epitaxial Growth and Characteristics of Gallium Oxide Based Ultrawide Bandgap Semiconductors2020

    • Author(s)
      Qixin GUO
    • Organizer
      The 10th International Conference on Electronics, Communications and Networks (CECNet 2020)
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Growth and Characterization of Tm Doped Gallium Oxide Films2019

    • Author(s)
      Qixin GUO, Shunsuke MOTOMURA, Katsuhiko SAITO, Tooru TANAKA
    • Organizer
      MATERIALS RESEARCH MEETING 2019
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] Characteristics of gallium oxide based wide bandgap semiconductors2019

    • Author(s)
      Qixin GUO
    • Organizer
      The 8th IEEE International Symposium on Next-Generation Electronics (ISNE 2019)
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Growth and Characterization of Ultra-Wide Bandgap Oxide Semiconductors2019

    • Author(s)
      Qixin GUO
    • Organizer
      2019 International Forum on Wide Bandgap Semiconductors
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research / Invited

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Published: 2019-04-18   Modified: 2023-01-30  

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