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Fabrication of high-density self-organized quantum dot array and control of photovoltaic conversion mechanism

Research Project

Project/Area Number 26246017
Research Category

Grant-in-Aid for Scientific Research (A)

Allocation TypeSingle-year Grants
Section一般
Research Field Crystal engineering
Research InstitutionThe University of Tokyo

Principal Investigator

OKADA YOSHITAKA  東京大学, 先端科学技術研究センター, 教授 (40224034)

Research Collaborator TAMAKI RYO  東京大学, 先端科学技術研究センター, 助教
SHOJI YASUSHI  東京大学, 先端科学技術研究センター, 特任助教
YOSHIDA KATSUHISA  東京大学, 先端科学技術研究センター, 特任研究員
Project Period (FY) 2014-04-01 – 2018-03-31
Project Status Completed (Fiscal Year 2017)
Budget Amount *help
¥41,860,000 (Direct Cost: ¥32,200,000、Indirect Cost: ¥9,660,000)
Fiscal Year 2017: ¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
Fiscal Year 2016: ¥8,060,000 (Direct Cost: ¥6,200,000、Indirect Cost: ¥1,860,000)
Fiscal Year 2015: ¥11,960,000 (Direct Cost: ¥9,200,000、Indirect Cost: ¥2,760,000)
Fiscal Year 2014: ¥17,810,000 (Direct Cost: ¥13,700,000、Indirect Cost: ¥4,110,000)
Keywords量子ドット太陽電池 / 中間バンド太陽電池 / 自己組織化量子ドット / 2段階光吸収過程 / 分子線エピタキシー / 量子ドット超格子 / 量子ドット / 2段階光吸収過程 / フーリエ変換光電流分光法 / 結晶成長 / 高効率太陽光発電材料・素子 / 太陽電池 / 半導体物性 / 量子ナノ構造 / 2段階光吸収 / 太陽光発電 / 量子効率
Outline of Final Research Achievements

The intermediate band solar cell is one of the most promising candidates for the next generation of photovoltaic cells with a maximum theoretical efficiency of >60% under sunlight concentration, and quantum dot based solar cells gained intense research.
In this work, type-II GaSb/AlGaAs quantum dot solar cells were investigated for application to intermediate band solar cells. Multi-stacked GaSb quantum dots were embedded in the i-region of host GaAs or AlGaAs single-junction solar cells. Fourier transform photocurrent spectroscopy with absolute intensity calibration revealed infrared external quantum efficiency spectra by two-step photon absorption. Thermionic emission of photo-carriers was suppressed efficiently in these device architectures, and significant photocurrent production via two-step photon absorption was confirmed at room temperature operation.

Report

(5 results)
  • 2017 Annual Research Report   Final Research Report ( PDF )
  • 2016 Annual Research Report
  • 2015 Annual Research Report
  • 2014 Annual Research Report

Research Products

(46 results)

All 2018 2017 2016 2015 2014 Other

All Int'l Joint Research (4 results) Journal Article (16 results) (of which Int'l Joint Research: 6 results,  Peer Reviewed: 14 results,  Open Access: 6 results) Presentation (19 results) (of which Int'l Joint Research: 13 results,  Invited: 9 results) Book (2 results) Remarks (5 results)

  • [Int'l Joint Research] 国立科学研究センター(CNRS)(フランス)

    • Related Report
      2017 Annual Research Report
  • [Int'l Joint Research] 国立科学研究センター(CNRS)(フランス)

    • Related Report
      2016 Annual Research Report
  • [Int'l Joint Research] インペリアルカレッジロンドン/ケンブリッジ大学(英国)

    • Related Report
      2015 Annual Research Report
  • [Int'l Joint Research] CNRS(フランス)

    • Related Report
      2015 Annual Research Report
  • [Journal Article] Multi-stacked GaSb/GaAs type-II quantum nanostructures for applica-tion to intermediate band solar cells2017

    • Author(s)
      Yasushi Shoji, Ryo Tamaki, Yoshitaka Okada
    • Journal Title

      AIP Advances

      Volume: 7 Pages: 065305-065305

    • DOI

      10.1063/1.4985722

    • Related Report
      2017 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Hybrid photovoltaic and thermoelectric module for high concentration solar system2017

    • Author(s)
      Ryo Tamaki, Takeshi Toyoda, Yoichi Tamura, Akinari Matoba, Toshiharu Minamikawa, Masayuki Tokuda, Megumi Masui, Yoshitaka Okada
    • Journal Title

      AIP Conference Proceedings

      Volume: 1881 Pages: 100002-100002

    • DOI

      10.1063/1.5001453

    • Related Report
      2017 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Effect of Si doping and sunlight concentration on the performance of InAs/GaAs quantum dot solar cells2017

    • Author(s)
      Shunya Naito, Katsuhisa Yoshida, Naoya Miyashita, Ryo Tamaki, Takuya Hoshii, Yoshitaka Okada
    • Journal Title

      Journal of Photonics for Energy

      Volume: 7 Pages: 025505-025505

    • DOI

      10.1117/1.jpe.7.025505

    • Related Report
      2017 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Efficient two-step photocarrier generation in bias-controlled InAs/GaAs quantum dot superlattice intermediate-band solar cells2017

    • Author(s)
      Kada T.、Asahi S.、Kaizu T.、Harada Y.、Tamaki R.、Okada Y.、Kita T.
    • Journal Title

      Scientific Reports

      Volume: 7 Pages: 5865-5865

    • DOI

      10.1038/s41598-017-05494-8

    • Related Report
      2017 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] High density quantum dot solar cells for concentrating photovoltaics2017

    • Author(s)
      Yoshitaka Okada, Yasushi Shoji, Chao-Yu Hung, Daniel J. Farrell, Tomah Sogabe
    • Journal Title

      IEEE Environment and Electrical Engineering and IEEE Industrial and Commercial Power Systems Europe

      Volume: June Pages: 1-1

    • DOI

      10.1109/eeeic.2017.7977408

    • Related Report
      2017 Annual Research Report
  • [Journal Article] Characterization of Cr Doped CuGaS2 Thin Films Synthesized By Chemical Spray Pyrolysis2017

    • Author(s)
      T. Ahsan, S. Kalainathan, N. Miyashita, T. Hoshii, Y. Okada
    • Journal Title

      Mechanics, Materials Science & Engineering MMSE Journal

      Volume: 9

    • Related Report
      2016 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Multiband modification of III-V dilute nitrides for IBSC application2017

    • Author(s)
      Nazmul Ahsan, Naoya Miyashita, Kin Man Yu, Wladek Walukiewicz, Yoshitaka Okada
    • Journal Title

      Proc. SPIE 10099, Physics, Simulation, and Photonic Engineering of Photovoltaic Devices VI

      Volume: -

    • DOI

      10.1117/12.2250700

    • Related Report
      2016 Annual Research Report
    • Int'l Joint Research
  • [Journal Article] Insights on energy selective contacts for thermal energy harvesting using double resonant tunneling contacts and numerical modeling2016

    • Author(s)
      A. Julian, Z. Jehl, N. Miyashita, Y. Okada, J.-F. Guillemoles
    • Journal Title

      Superlattices and Microstructures

      Volume: 100 Pages: 749-756

    • DOI

      10.1016/j.spmi.2016.10.023

    • Related Report
      2016 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Demonstration of the operation principles of intermediate band solar cells at room temperature2016

    • Author(s)
      E. López, A. Datas, I. Ramiro, P.G. Linares, E. Antolin, I. Artacho, A. Marti, A. Luque, Y. Shoji, T. Sogabe, A. Ogura, Y. Okada
    • Journal Title

      Solar Energy Materials and Solar Cells

      Volume: 149 Pages: 15-18

    • DOI

      10.1016/j.solmat.2015.12.031

    • Related Report
      2016 Annual Research Report 2015 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Intermediate band solar cells: Recent progress and future directions2015

    • Author(s)
      Y. Okada, N. J. Ekins-Daukes, T. Kita, R. Tamaki, M. Yoshida, A. Pusch, O. Hess, C. C. Phillips, D. J. Farrell, K. Yoshida, N. Ahsan, Y. Shoji, T. Sogabe, and J-F. Guillemoles
    • Journal Title

      Applied Physics Reviews

      Volume: 2 Pages: 021302-021302

    • DOI

      10.1063/1.4916561

    • Related Report
      2015 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Two-Step Photon Absorption in InAs/GaAs Quantum-Dot Superlattice Solar Cells2015

    • Author(s)
      T. Kada, S. Asahi, T. Kaizu, Y. Harada, T. Kita, R. Tamaki, Y. Okada, and K. Miyano
    • Journal Title

      Physical Review B

      Volume: 91 Pages: 201303-201303

    • DOI

      10.1103/physrevb.91.201303

    • Related Report
      2015 Annual Research Report
    • Peer Reviewed
  • [Journal Article] A hot-electron thermophotonic solar cell demonstrated by thermal up-conversion of sub-bandgap photons2015

    • Author(s)
      Daniel J. Farrell, Hassanet Sodabanlu, Yunpeng Wang, Masakazu Sugiyama, and Yoshitaka Okada
    • Journal Title

      Nature Communications

      Volume: 6 Pages: 8685-8685

    • DOI

      10.1038/ncomms9685

    • Related Report
      2015 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Spectrally resolved interband and intraband transitions by two-step photon absorption in InGaAs/GaAs quantum dot solar cells2015

    • Author(s)
      Ryo Tamaki, Yasushi Shoji, Yoshitaka Okada, and Kenjiro Miyano
    • Journal Title

      IEEE Journal of Photovoltaics

      Volume: 5 Pages: 229-229

    • DOI

      10.1109/jphotov.2014.2368712

    • Related Report
      2015 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Efficiency Estimations for Multijunction and Intermediate Band Solar Cells Using Actual Measured Solar Spectra in Japan2015

    • Author(s)
      Shunya Naitoh and Yoshitaka Okada
    • Journal Title

      Journal of Solar Energy Engineering

      Volume: 137 Pages: 034504-034504

    • DOI

      10.1115/1.4029382

    • Related Report
      2014 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Spectrally resolved intraband transitions on two-step photon absorption in InGaAs/GaAs quantum dot solar cell2014

    • Author(s)
      Ryo Tamaki, Yasushi Shoji, Yoshitaka Okada, and Kenjiro Miyano
    • Journal Title

      Applied Physics Letters

      Volume: 105 Pages: 073118-073118

    • DOI

      10.1063/1.4893879

    • Related Report
      2014 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Enhancement of current collection in epitaxial lift-off InAs/GaAs quantum dot thin film solar cell and concentrated photovoltaic study2014

    • Author(s)
      Tomah Sogabe, Yasushi Shoji, Peter Mulder, John Schermer, Efrain Tamayo, and Yoshitaka Okada
    • Journal Title

      Applied Physics Letters

      Volume: 105 Pages: 113904-113904

    • DOI

      10.1063/1.4896114

    • Related Report
      2014 Annual Research Report
    • Peer Reviewed
  • [Presentation] Recent Progress of Quantum Dot Intermediate Band Solar Cells2017

    • Author(s)
      岡田 至崇, 庄司 靖, 吉田 勝尚, 内藤 駿弥, 玉置 亮
    • Organizer
      第64回応用物理学会春季学術講演会
    • Place of Presentation
      パシフィコ横浜
    • Year and Date
      2017-03-14
    • Related Report
      2016 Annual Research Report
    • Invited
  • [Presentation] Challenges and Progress on the Development of Quantum Dot Intermediate Band Solar Cells2017

    • Author(s)
      Yoshitaka Okada, Yasushi Shoji, Ryo Tamaki
    • Organizer
      2017 MRS Spring Meeting
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Type-II Quantum Dots for Application to Photon Ratchet Intermediate Band Solar Cells2017

    • Author(s)
      Ryo Tamaki, Yasushi Shoji, Yoshitaka Okada
    • Organizer
      44th IEEE Photovoltaic Specialists Conference
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Hot Carrier Transportation Dynamics in InAs/GaAs Quantum Dot Solar Cell2017

    • Author(s)
      Tomah Sogabe, Kohdai Nii, Katsuyoshi Sakamoto, Koichi Yamaguchi, Yoshitaka Okada
    • Organizer
      44th IEEE Photovoltaic Specialists Conference
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 50-layer stacked InGaAs/GaAs quantum dot solar cell with light scattering structure2017

    • Author(s)
      Y. Shoji, K. Watanabe, A. Ogura, Y. Okada
    • Organizer
      33rd European Photovoltaic Solar Energy Conference and Exhibition
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research
  • [Presentation] In(Ga)As / Al0.2GaAs QUANTUM DOT INTERMEDIATE-BAND-ASSISTED HOT-CARRIER SOLAR CELL WITH FABRY-PEROT CAVITY2017

    • Author(s)
      Benoît Behaghel, Pierre Rale, Hung-Ling Chen, Laurent Lombez, Yasushi Shoji, Ryo Tamaki, Stéphane Collin, Yoshitaka Okada, Jean-François Guillemoles
    • Organizer
      27th International Photovoltaic Science and Engineering Conference
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Progress of Quantum Dot Intermediate-Band Solar Cells2016

    • Author(s)
      Yoshitaka Okada
    • Organizer
      26th International Photovoltaic Science and Engineering Conference
    • Place of Presentation
      Marina Bay Sands Expo and Convention Centre, Singapore
    • Year and Date
      2016-10-24
    • Related Report
      2016 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Improvements in Quantum Dot Intermediate Band Solar Cells2016

    • Author(s)
      Y. Okada, Y. Shoji, S. Naito and R. Tamaki
    • Organizer
      19th International Conference of Superlattices, Nanostructures and Nanodevices
    • Place of Presentation
      City University of Hong Kong, Hong Kong
    • Year and Date
      2016-07-26
    • Related Report
      2016 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Current Trends in High-Efficiency Ⅲ-ⅤNanostructured Solar Cells2016

    • Author(s)
      Yoshitaka Okada
    • Organizer
      Compound Semiconductor Week 2016 (CSW)
    • Place of Presentation
      Toyama International Conference Center, Japan
    • Year and Date
      2016-06-26
    • Related Report
      2016 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Universal Linear Relationship on Two-Step Photon Absorption Processes in In(Ga)As Quantum Dot Solar Cells2016

    • Author(s)
      Ryo Tamaki, Yasushi Shoji, Takeyoshi Sugaya, Yoshitaka Okada
    • Organizer
      43rd IEEE Photovoltaic Specialists Conference
    • Place of Presentation
      Oregon Convention Center, USA
    • Year and Date
      2016-06-05
    • Related Report
      2016 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 量子ドット中間バンド太陽電池の高効率化メカニズム2016

    • Author(s)
      岡田 至崇、庄司 靖、玉置 亮、吉田 勝尚、曽我部 東馬
    • Organizer
      第63回応用物理学会春季学術講演会
    • Place of Presentation
      東京工業大学
    • Year and Date
      2016-03-19
    • Related Report
      2015 Annual Research Report
    • Invited
  • [Presentation] Design optimization for two-step photon absorption in quantum dots by infrared photocurrent spectroscopy2016

    • Author(s)
      Ryo Tamaki, Yasushi Shoji, and Yoshitaka Okada
    • Organizer
      SPIE Photonics West Meeting
    • Place of Presentation
      アメリカ・サンフランシスコ
    • Year and Date
      2016-02-13
    • Related Report
      2015 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Effect of Si Doping on Performance of Quantum Dot Solar Cells2015

    • Author(s)
      S. Naitoh, N. Miyashita, K. Toprasertpong, R. Tamaki, T. Hoshii, M. Sugiyama, and Y. Okada
    • Organizer
      31st European Photovoltaic Solar Energy Conference and Exhibition (EU-PVSEC)
    • Place of Presentation
      ドイツ・ハンブルグ
    • Year and Date
      2015-09-14
    • Related Report
      2015 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Quantitative Optical Spectroscopy of QDs Intermediate Band Solar Cells2015

    • Author(s)
      P. Rale, B. Behaghel, A. Delamarre, N. Vandamme, D. Ory, S. Collin, L. Lombez, J.F. Guillemoles, R. Tamaki, Y. Shoji, and Y. Okada
    • Organizer
      31st European Photovoltaic Solar Energy Conference and Exhibition (EU-PVSEC)
    • Place of Presentation
      ドイツ・ハンブルグ
    • Year and Date
      2015-09-14
    • Related Report
      2015 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Evaluation of 1.0 eV GaInNAsSb Solar Cells for Multi-Junction Applications and Annealing Effects2015

    • Author(s)
      N. Miyashita, N. Ahsan, and Y. Okada
    • Organizer
      31st European Photovoltaic Solar Energy Conference and Exhibition (EU-PVSEC)
    • Place of Presentation
      ドイツ・ハンブルグ
    • Year and Date
      2015-09-14
    • Related Report
      2015 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Recent Progress on Quantum Dot Intermediate Band Solar Cells2014

    • Author(s)
      Yoshitaka Okada
    • Organizer
      The 27th International Microprocesses and Nanotechnology Conference (MNC)
    • Place of Presentation
      福岡
    • Year and Date
      2014-11-04 – 2014-11-07
    • Related Report
      2014 Annual Research Report
    • Invited
  • [Presentation] Quantum Dot Superlattice for High-efficiency Intermediate Band Solar Cells2014

    • Author(s)
      Yoshitaka Okada
    • Organizer
      OSA Congress on Optical Nanostructures and Advanced Materials for Photovoltaics
    • Place of Presentation
      Canberra, Australia
    • Year and Date
      2014-11-02 – 2014-11-05
    • Related Report
      2014 Annual Research Report
    • Invited
  • [Presentation] Self-organized QDs for intermediate-band solar cells2014

    • Author(s)
      Yoshitaka Okada
    • Organizer
      2014 Workshop on High-Efficiency Material for Photovoltaics (HEMP)
    • Place of Presentation
      Imperial College London, UK
    • Year and Date
      2014-07-21 – 2014-07-22
    • Related Report
      2014 Annual Research Report
    • Invited
  • [Presentation] Intermediate Band Materials for High Efficiency Solar Cells2014

    • Author(s)
      Yoshitaka Okada
    • Organizer
      The 41st International Conference on Metallurgical Coatings and Thin Films (ICMCTF)
    • Place of Presentation
      San Diego, USA
    • Year and Date
      2014-04-28 – 2014-05-02
    • Related Report
      2014 Annual Research Report
    • Invited
  • [Book] 次世代の太陽電池・太陽光発電 -その発電効率向上,用途と市場の可能性-2018

    • Author(s)
      共著
    • Total Pages
      500
    • Publisher
      技術情報協会
    • Related Report
      2017 Annual Research Report
  • [Book] “Intermediate Band Solar Cells”, in Advanced Concepts in Photovoltaics2014

    • Author(s)
      Yoshitaka Okada, Tomah Sogabe, and Yasushi Shoji
    • Total Pages
      608
    • Publisher
      Royal Society of Chemistry, UK
    • Related Report
      2014 Annual Research Report
  • [Remarks] 東京大学 先端科学技術研究センター 岡田研究室

    • URL

      http://mbe.rcast.u-tokyo.ac.jp/

    • Related Report
      2017 Annual Research Report 2016 Annual Research Report
  • [Remarks] CNRS-RCAST NextPV

    • URL

      http://www.liapv.rcast.u-tokyo.ac.jp/NextPV/Home.html

    • Related Report
      2017 Annual Research Report 2015 Annual Research Report
  • [Remarks] Quantum Photovoltaics Group

    • URL

      http://www.imperial.ac.uk/quantum-photovoltaics

    • Related Report
      2015 Annual Research Report
  • [Remarks] Semiconductor Physics Group

    • URL

      http://www.sp.phy.cam.ac.uk/research

    • Related Report
      2015 Annual Research Report
  • [Remarks] 東京大学 先端科学技術研究センター 岡田研究室

    • URL

      http://mbe.rcast.u-tokyo.ac.jp/index.html

    • Related Report
      2014 Annual Research Report

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Published: 2014-04-04   Modified: 2022-02-07  

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