• 2016年 〜

          T.Sogabe, C-Y. Hung, R.Tamaki, S.Tomic, K.Yamaguchi, N. Ekins-Daukes and Y. Okada, “Experimental demonstration of energy-transfer ratchet intermediate-band solar cell”, Communications  Physics  4, 38 (2021). nature).   (pdf file is available and is for academic use only)

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    Editor’s Highlightに選出:Editor’s Highlights – Communications Physics (

  •     C-C. Chen, K. Shiba, M.Sogabe, K.Sakamoto and T. Sogabe :“Hybrid quantum-classical dynamic programming algorithm”, In: Yada K. et al. (eds) Advances in Artificial Intelligence. JSAI 2020. Advances in Intelligent Systems and Computing, vol 1357. Springer, Cham. DOI: 10.1007/978-3-030-73113-7_18 (2021)

  •   R.Sogabe, D. Bahadur Malla, M.Sogabe, K.Sakamoto and T. Sogabe :“Impact of Domain Knowledge’s Quality on Inverse Reinforcement Learning”,  In: Yada K. et al. (eds) Advances in Artificial Intelligence. JSAI 2020. Advances in Intelligent Systems and Computing, vol 1357.  DOI: 10.1007/978-3-030-73113-7_9 (2021)

  •       C-C. Chen, M.Watabe, K. Shiba, M.Sogabe, K.Sakamoto and T. Sogabe, “On the expressibility and overfitting of quantum circuit learning”, ACM Transactions on Quantum Computing (Submitted).

  •       K. Shiba, C-C. Chen,  M.Sogabe, K. Sakamoto and T. Sogabe, “Quantum-inspired classification algorithm fromDBSCAN-Deutsch-Jozsa support vectors and Isingprediction model”, Quantum Machine Intelligence (submitted).

  •       T. Sogabe, C.-Y. Hung, R. Tamaki, S. Tomic, N. Ekins-Daukes and Y. Okada, “Fabrication of Erbium Doped GaAs Intermediate-Band Solar Cell”, Proceedings of the European Photovoltaic Solar Energy Conference and Exhibition, 13-19, 3-936338-73-6(2020), DOI:10.4229/EUPVSEC20202020-1AO.2.3

  •       R. Suzuki, K. Terada, K. Sakamoto, T. Sogabe and K. Yamaguchi : “ Low Sunlight Concentration Properties of InAs Ultrahigh-Density Quantum-Dot Solar Cells”, Jpn. J. Appl. Phys., 58, (2019) pp.071004 1-7.

  •       B. Mae Yu Jeco, T. Sogabe, Y. Okada , “Analysis of Temperature-Dependent Luminescence  Coupling Effect in InGaP/GaAs/Ge Triple Junction Solar Cells using Quasi-2-Dimensional
    Simulation Model”, Japanese Journal of applied physics, In press (2017)

  •       T. Sogabe, K. Nii, K. Sakamoto, K. Yamaguchi, and Y. Okada,” Hot Carrier Transportation Dynamics in InAs/GaAs Quantum Dot Solar Cell”, arXiv:1702.02015 preprint (2017)

  •       Bernice Mae Yu Jeco, T.Sogabe, N. Ahsan, and Y. Okada, Temperature Dependence of Luminescence Coupling Effect in InGaP/GaAs/Ge Triple Junction Solar Cells J. Photon. Energy  (in press)

  •       Chao-Yu Hung, Tomah Sogabe, Naoya Miyashita, and Yoshitaka Okada, ”Growth of ErAs nanodots by molecular beam epitaxy for application to tunneling junctions in multijunction solar cells”, Japanese Journal of Applied Phyisics, 55, 021201,(2016)

  •       E. López, A. Datas, I. Ramiro, P.G. Linares, E. Antolín, I. Artacho, A. Martí, A. Luque, Y. Shoji, T. Sogabe, A. Ogura, Y. Okada, “Demonstration of the operation principles of Intermediate Band Solar Cells at room temperature” , Sol. Energ. Mat. Sol. Solar Energy Materials and Solar Cells, 149, 15, (2016),

  •       T. Sogabe, Q. Shen, Y. Yamaguchi, “Recent progress on quantum dot solar cells: A review”, J. Photon. Energy. 6(4) 040901 (2016)

  •       T. Sogabe, H. Ichikawa, K. Sakamoto, K. Yamaguchi, M. Sogabe, Y. Suwa, T. Sato , ”Optimization of decentralized renewable energy system by weather forecasting and deep machine learning techniques”, IEEE Innovative Smart Grid Technologies – Asia (ISGT-Asia, 2016) DOI: 10.1109/ISGT-Asia.2016.7796524 (2016)

  • 2011年〜2016年

    G. Linares, E. López, I. Ramiro, A. Datas, E. Antolín, Y. Shoji, T. Sogabe, Y. Okada, A. Martí, and A. Luque: Voltage limitation analysis in strain-balanced InAs/GaAsN quantum dot solar cells applied to the intermediate band concept, Sol. Energ. Mat. Sol., 132, 178 (5 pages)(2015)

  • Datas, E. López, I. Ramiro, E. Antolín, A. Martí, A. Luque, R. Tamaki, Y. Shoji, T. Sogabe, and Y. Okada: Intermediate Band Solar Cell with Extreme Broadband Spectrum Quantum Efficiency, Phys. Rev. Lett. 114, 157701(4 pages) (2015) [selected as “Editorial Suggestion paper in Phys. Rev. Lett.]

  • López, A.Datas, I.Ramiro, P.G. Linares, E. Antolín, I. Artacho, A.Martí and A. Luque,Y. Shoji, T. Sogabe, A. Ogura and Y. Okada: Demonstration of the operation principles of Intermediate Band Solar Cells at room temperature, Sol. Energ. Mat. Sol., 149,15(4 pages) (2015)

  • C-Y. Hung, Sogabe, N.Miyashita, Y.Okada: Growth of ErAs nanodots by molecular beam epitaxy for application to tunneling junctions in multijunction solar cells, Jpn. J. Appl. Phys. 55 021201(7 pages) (2015)

  • Sogabe, A.Ogura, M.Ohba,Y. Okada, “Self-consistent electrical parameter extraction from bias dependent spectral response measurements of III-V multi-junction solar cells”, Prog. Photovolt: Res. Appl., 23, 37(12 pages)(2015)

  • Sogabe, Y.Shoji, P.Mulder, J.Schermer, E.Tamayo,Y.Okada, “Enhancement of current collection in epitaxial lift-off InAs/GaAs quantum dot thin film solar cell and concentrated photovoltaic study”, Appl. Phys. Lett. 105, 113904(4 pages) (2014)

  • Sogabe, Y.Shoji, M.Ohba, K.Yoshida, R.Tamaki, H-F. Hong, C-H. Wu, C-T. Kuo, S. Tomić, Y.Okada, ” Intermediate-band dynamics of quantum dots solar cell in concentrator photovoltaic modules “, Sci. Rep. (Nature Publishing Group), 4, 4792(7 pages) (2014)

  • Ogura, T.Sogabe, M.Ohba,Y.Okada, “Extraction of electrical parameters in multi-junction solar cells from voltage dependent spectral response without light bias”, Jpn J. Appl.Phys. 53, 066601 (5 pages)(2014)

  • Sogabe, A.Ogura, Y.Okada, “Analysis of bias voltage dependent spectral response in Ga0.51In0.49P/Ga0.99In0.01As/Ge triple junction solar cell”, J.Appl.Phys. 115, 7, 074503(7 pages) (2014)

  • Tomić, T.Sogabe*,Y.Okada, “In-plane coupling effect on absorption coefficients of InAs/GaAs quantum dots arrays for intermediate band solar cell”, Prog. Photovolt: Res. Appl., 23,546(13 pages)(2014) (Co-corresponding author)

  • Sogabe, T.Kaizu, Y.Okada,S.Tomić, “Theoretical analysis of GaAs/AlGaAs quantum dots in quantum wire array for intermediate band solar cell”, J. Renewable Sustainable Energy, 6, 011206(11 pages) (2014)

  • Sogabe, A.Ogura, C-Y. Hung, V. Evstropov, M.Mintairov, M.Shvarts,Y.Okada, “Experimental characterization and self-consistent modeling of luminescence coupling effect in III-V multijunction solar cells”, Appl. Phys. Lett. 103, 263907(4 pages) (2013)

  • Okada, N. J. Ekins-Daukes, T. Kita, R. Tamaki, M. Yoshida, A. Pusch, O. Hess, C. C. Phillips, D. J. Farrell1, K. Yoshida1, N. Ahsan, Y. Shoji, T. Sogabe and J.-F. Guillemoles Intermediate band solar cells: Recent progress and future directions, Appl. Phys. Rev. 2, 021302 (2015) [Selected as the cover of the issue]

  • Y. Okada, K. Yoshida, Y. Shoji, T. Sogabe,  “Recent progress on quantum dot intermediate band solar cells”, (review paper ) IEICE Electronics Express, 10, 1 (2013)

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