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The University of Electro-Communications  Graduate School of Informatics and Engineering, School of Informatics and Engineering  "Department of Engineering Science, Cluster III （Fundamental Science and Engineering）"

Associate Professor  Varun VOHRA  Year of birth:1984   Tel.042-443-5359

■ Academic degrees DEUG equivalent in Materials Science Possibility to pass the exam for prestigious engineering schools in France  Chaptal (Classe Préparatoire aux Grandes Ecoles)  2003/06/27  Engineering Diploma in Materials Science (Polymer speciality)  European School of Chemistry, Polymers and Materials  2006/09/15  Master's Degree in Materials Science  Louis Pasteur University  2006/09/22  PhD in Materials Science  Milano-Bicocca University  2009/12/17    ■ Current research areas Device related chemistry  Composite materials/Surface and interface engineering  Structural/Functional materials  Material processing/Microstructural control engineering    ■ Current research subjects Multi-level self-assembled systems  2006/11/01-2009/12/17  Zeolite L based organic/inorganic hybrid system to enhance the PL properties of organic dye molecules.  electro-spinning  2006/11/01-Present  Process to produce various types of functional polymeric nanofibers. white-light emitting nanofibers, electro luminescent nanofibers.  Polymer-Polymer self-assembly  2006/11/01-Present  Breath Figures Array (BFA) Electrospun self-assembled nanofibers Formation of nanostructures through polymer-polymer self-assembly (phase separation)  organic light emitting devices  2007/09/01-Present  Development of new and innovative types of light-emitting devices based on conjugated polymer materials. Integration of conjugated polymer nanofibers into device architecture.  Organic Solar Cells  2010/05/15-Present  Formation of donor-acceptor concentration gradients in active layers. New materials for OPV New Device architectures Molecular orientation and morphology of the active layer    ■ Published books Book  Interface Engineering: A Key Aspect for the Potential Commercialization of Printable Organic Photovoltaic Cells  Varun VOHRA, Nur Tahirah Razali, Hideyuki Murata  Wiley-Scrivener  2017/05  Book  Systematic study of organic solar cells cross-section by EDS to correlate donor-acceptor vertical concentration gradients and device performances  Varun VOHRA Nur Tahirah Razali Hideyuki Murata  One Central Press  2017/01  978-1-910086-19-3  Book  Chemical Science of π-Electron Systems  Varun Vohra, Koichi Higashimine, Keisuke Ohdaira, Shogo Tsuzaki, Hideyuki Murata  Springer  2015  978-4-431-55356-4  View details...   ■ Published papers Paper  Yes  High performance organic solar cells fabricated using recycled transparent conductive substrates  Takada, Tomoaki Uchiyama, Takayuki Okada-Shudo, Yoshiko Hoshino, Katsuhito Koizumi, Ko Takeoka, Yuko Vohra, Varun  ACS Sustainable Chemistry & Engineering  Just Accepted/ 10.1021/acssuschemeng.0c01966  2020/03/25  Paper  Yes  Ternary Active Layers for Neutral Color Semitransparent Organic Solar Cells with PCEs over 4%  Takashi Sano, Shusei Inaba, Varun Vohra  ACS Applied Energy Materials  2, 2534-2540  2019/03/15  10.1021/acsaem.8b02144  Paper  Yes  Eco-Friendly Push-Coated Polymer Solar Cells with No Active Material Wastes Yield Power Conversion Efficiencies over 5.5%  Shusei Inaba, Ryosuke Arai, Geanina Mihai, Oana Lazar, Calin Moise, Marius Enachescu, Yuko Takeoka, Varun Vohra  ACS Applied Materials & Interfaces  11, 10785-10793  2019/02/21  10.1021/acsami.8b22337  Paper  Yes  Efficient Ultrathin Organic Solar Cells with Sustainable β-Carotene as Electron Donor  Varun Vohra, Takayuki Uchiyama, Shusei Inaba, Yoshiko Okada-Shudo  ACS Sustainable Chemistry & Engineering  7/ 4, 4376-4381  2019/01/17  10.1021/acssuschemeng.8b06255  Paper  Yes  Natural Dyes and Their Derivatives Integrated into Organic Solar Cells  Varun Vohra  Materials  11, 2579-  2018/12/18  View details...   ■ Research presentations Oral presentation for an academic conference  Green & sustainable fabrication of organic electronic devices by push-coating  30th Assembly of Advanced Materials Congress  IAAM Award lecture  Yes  Varun Vohra, Shusei Inaba, Takayuki Uchiyama, Yoshiko Okada  2019/11/01  Oral presentation for an academic conference  Long-lasting organic solar cells using natural carotenoids as electron donors  5th International Workshop on Nano and Bio-Photonics (IWNBP)  無し  Yes  V. Vohra, T. Uchiyama, Y. Okada-Shudo  2019/09/24  Oral presentation for an academic conference  Air-processed PCDTBT-based ternary active layers for neutral color semitransparent organic solar cells with a color rendering index of 98  International Conference on Organic Electronics 2019  Organic Solar Cells  Yes  V. Vohra  2019/06/28  Oral presentation for an academic conference  Efficient and stable organic solar cells produced by push-coating with no material or hazardous solvent wastes  4th Green and Sustainable Chemistry Conference  Session 1/ O1  Yes  Varun Vohra, Shusei Inaba, Ryosuke Arai, Yuko Takeoka  2019/05/06  Oral presentation for an academic conference  Highly sustainable PV windows employing natural dyes  4th Green & Sustainable Chemistry Conference  SP05  Yes  Varun Vohra  2019/05/06  View details...   ■ Awards UEC学生表彰候補者  2019  エヌエフ基金　研究開発奨励賞　優秀賞  低コスト光発電窓のグリーン＆サステナブル作製を実現した研究  2019/11/22  IAAM Award  Green & sustainable fabrication of organic electronic devices by push-coating  2019/11/01  Green and Sustainable Chemistry Challenge (Top 5 entries)  Highly sustainable PV windows employing natural dyes  2019/05/06  平成30年度先進理工学専攻光工学プログラム修士論文　目黒会優秀発表  プッシュコート法による環境に配慮した低コスト有機太陽電池の作製  2019/02/07  View details...