Researcher Database

（Last updated : 2022-05-19 10:40:03）

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KAWANO YU

Department / Course College of Science and Engineering Department of Electrical and Electronic Engineering

Title / Position Assistant Professor

Other Affiliations
1.	Graduate School of Science and Engineering

Academic background
1.	2018/02～2018/03	Advanced Electrical, Electronic and Computer Systems │ Graduate School of Science and Engineering │ Ritsumeikan University │ Completed Doctor of Philosophy in Engineering
2.	2013/04～2016/03	Doctoral Program (2nd Semester) │ Advanced Electrical, Electronic and Computer Systems │ Graduate School of Science and Engineering │ Ritsumeikan University │ Accomplished credits for doctoral program
3.	2011/04～2013/03	Doctoral Program (1st Semester) │ Advanced Electrical, Electronic and Computer Systems │ Graduate School of Science and Engineering │ Ritsumeikan University │ Completed Master of Engineering
4.	2009/04～2011/03	Department of photonics │ Graduate School of Science and Engineering │ Ritsumeikan University │ Graduated
5.	2004/04～2009/03	Electrical and Engineering │ National Institute of Technology, Miyakonojo College │ Graduated

Business career
1.	2016/04/01 ～ 2018/02/28	│ │ Solar Frontier K.K.

Research activities
1.		Japan Society of Applied Physics

Qualification and license
1.	2016	The Official Business Skills Test in Bookkeeping, 3rd grade

Subject of research
1.	Developing of high efficiency solar cells with Tin(II) sulfide(VI) thin film absorber

Research summary
Developing of high efficiency thin film solar cells Renewable energy is one of the most interesting energies for alternatives to fossil fuel and nuclear energies with the large-scale installation globally to obtain a sustainable society, including Japan. The solar cells, converting from solar energy to electric energy, are essential to be developed for the renewable energy since they do not lead to the emission of carbon dioxide, which is a cause of the greenhouse effect. The global installation of the solar cells with low cost and high conversion efficiency of the solar cell is vital for the creation of sustainable society. My research theme is to enhance conversion efficiency of Tin (II) Sufide (VI) (SnS) and CsPbI3 thin-film solar cells through the optimization of their band structure. This is because the SnS and CsPbI3 demonstrates the appropriate electrical and optical properties as an absorber of the solar cell. These thin-film solar cells with various structures are worthy to be developed and characterized.

Present specialized field
Thin film/Surface and interfacial physical properties, Inorganic industrial materials, Electronic materials/Electric materials, Inorganic materials/Physical properties (Keyword：Solar Cell, Photovoltaics, Solar Energy, Renewable Energy, thin film, semiconductor)

Papers
1.	2021/04/27	Accurate estimation of outdoor performance of photovoltaic module through spectral mismatch correction factor under wide range of solar spectrum │ Current Applied Physics │ 28,pp.59-71 (Co-authored)
2.	2021/03/12	Optimized bandgaps of top and bottom subcells for bifacial two-terminal tandem solar cells under different back irradiances │ Solar Energy │ 220,pp.165-174 (Co-authored)
3.	2021/02/04	Impact of Auger recombination on performance limitation of perovskite solar cell │ Solar Energy │ 217,pp.342-353 (Co-authored)
4.	2021/02/01	Device Design for High-performance Bifacial Cu(In,Ga)Se2 Solar Cells under Front and Rear Illuminations │ Solar Energy │ 218,pp.76-84 (Co-authored)
5.	2021/01/06	Thermodynamic limit of tandem solar cells under different solar spectra and their perovskite top solar cell │ Optical Materials │ 113,pp.110819 (Co-authored)
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Academic conference presentation
1.	2018/11/16	Device parameter extraction using single diode model for high efficiency perovskite solar cells (The 7th Korea-Japan Joint Seminar on PV)
2.	2018/11/16	Mimicking perovskite solar cells by device simulation considering band gap grading (The 7th Korea-Japan Joint Seminar on PV)
3.	2018/07/12	カリウム添加ペロブスカイト太陽電池のシミュレーションによる動作解析 (学振175委員会　第15回　「次世代の太陽電池」　シンポジウム)
4.	2018/07/12	太陽電池モジュールのスペクトルミスマッチ補正に対する照度の影響 (学振175委員会　第15回　「次世代の太陽電池」　シンポジウム)
5.	2018/07/02	Zn1-xMgxOバッファ層を用いたSnS太陽電池の伝導帯不連続量の制御 (学振175委員会　第15回　「次世代の太陽電池」　シンポジウム)
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Winning science prize
1.	2013/03	The Japan Society of Applied Physics Young Scientist Presentation Award