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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  Metal oxides and noble metals application in organic solar cells  Popoti J.Maake, Amogelang S.Bolokang, Christopher J.Arendse, VarunVohra, Emmanuel I.Iwuoha, David E.Motaung  Solar Energy  207, 347-366  2020/09/01  Paper  Yes  Water-Processed Organic Solar Cells with Open-Circuit Voltages Exceeding 1.3V  Varun Vohra Shunsuke Shimizu Yuko Takeoka  Coatings  10, 421-  2020/04/24  10.3390/coatings10040421  Paper  Yes  Durable organic solar cells produced by in-situ encapsulation of an air-sensitive natural organic semiconductor by the fullerene derivative and the metal oxide layer  Takayuki Uchiyama Takashi Sano Yoshiko Okada-Shudo Varun Vohra  Journal of Materials Chemistry C  8, 7162-7169  2020/04/21  10.1039/D0TC00379D  Paper  Yes  Effect of Alkyl Side Chain Length on Intra and Inter-Molecular Interactions of Terthiophene-Isoindigo Copolymers  Joint  Newayemedhin A. Tegegne Zelalem Abdissa Wendimagegn Mammo Takayuki Uchiyama Yoshiko Okada-Shudo Francesco Galeotti William Porzio Mats R Andersson Derck Schlettwein Varun Vohra Heinrich Schwoerer  Journal of Physical Chemistry C  124, 9644-9655  2020/04/14  10.1021/acs.jpcc.9b11072  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  8, 5807-5814  2020/03/25  10.1021/acssuschemeng.0c01966  View details...   ■ Research presentations Oral presentation for an academic conference  Recycling of Costly Transparent Electrode Substrates from Degraded Organic Solar Cells  Online Summit on Recycling and Waste Management  Day 1/ Session 2  Yes  Varun Vohra, Tomoaki Takada  2020/07/02  Oral presentation for an academic conference  Green & Sustainable Fabrication of Organic Solar Cells  Online Summit on Carbon Materials and Nanotechnology  Session 2/ Invited 1  Yes  Varun Vohra, Shusei Inaba, Yumi Matsunaga, Tomoaki Takada  2020/06/30  Oral presentation for an academic conference  Simple strategies to produce efficient, green & sustainable organic photovoltaic devices  Advanced Materials Lecture Series 2020  IAAM Fellow Lecture  Yes  2020/06/10  Oral presentation for an academic conference  Towards sustainable and low-cost semitransparent photovoltaic windows produced with environmental-friendly processes  The 9th Conference on Nanomaterials (CN-BT 2019)  Keynote Speech-18  Yes  2019/12/15  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  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...