1. Department of Chemistry Seminar Announcement Date/Time/VenueTitle/Speaker 30 Mar (Wed) 11am – 12nn @ S8 Level 3 Executive Classroom Molecular chemistry and flexible electronics – a perfect match Professor A L Roy Vellaisamy City University of Hong Kong Host : Assoc Prof John Yip Hon Kay About the Speaker All are Welcome Abstract The search for new classes of organic and metal-organic compounds is of immense current interest due to their relative low-cost and potential applications in electronic logic circuits, photonics and in energy harvesting. The development of functional self-assembly materials represents a new frontier in electronics with unprecedented device properties. Structural tailorability and multifunctionality of molecules is an important criterion to develop self- assembly molecules for the incorporation in electronic switches, photovoltaic and opto- electronic devices. In this talk, I discuss various self-assembled organic/organo-metallic molecular materials and their molecular alignment for the construction of electronic and opto- electronic devices. ZX Xu, V. A. L. Roy, ZT. Liu, CS Lee, “Importance of molecular alignment for organic photovoltaic devices”, Appl. Phys. Lett., 97(16), 163301, 2010. KH Low, V. A. L. Roy, SSY Chui and CM Che, “Highly conducting two-dimensional copper(I) 4-hydroxythiophenolate network”, Chem. Comm. 46 (39), 7328-7330, 2010. W Lu, Y Chen, V. A. L. Roy, et al., “Supramolecular Polymers and Chromonic Mesophases Self-Organized from Phosphorescent Cationic Organoplatinum(II) Complexes in Water”, ANGEWANDTE CHEMIE-INTERNATIONAL EDITION, 48(41), 7621-7625, 2009 MY Yuen, V. A. L. Roy, W Lu, et al., “Semiconducting and Electroluminescent Nanowires Self-Assembled from Organoplatinum(II) Complexes”, ANGEWANDTE CHEMIE-INTERNATIONAL EDITION, 47 (51), 9895-9899, 2008 Prof Roy started his research on light emitting materials for his PhD, mainly on ESR (Electron Spin Resonance) analysis of organic materials with Dr. R. B. Pode, Dr. Baldacchini (ENEA, Rome) and Dr. T. K. Gundurao (IIT, Bombay). After his PhD, he started working on the growth of wide band gap nano- structures (ZnO) and their physical (optical & magnetic) properties with the intention that they could be used in electronic devices as nano-composites. For his post-doctoral studies (with Dr. Michele Muccini and his group at ISMN, CNR di Bologna, Italy), he focused on the His research interests includes Molecular electronics, Molecular self-assembly, Nano- Photonics, Nano-materials science, Bio-electronics, Renewable energy (Solar and Fuel cells) and Flexible electronics. Prof Roy mainly focuses on molecular materials (Inorganic, organic and biological molecules) for electronic devices such as Thin Film Transistors (TFTs), Photovoltaics and LEDs (Light Emitting Diodes). His research is interdisciplinary and it’s a blend of Physics, Materials science, Engineering, and Biology. growth of various organic molecules for light emitting transistors (LET) and opto-electronic characterisation of LETs. He joined the Department of Chemistry at The University of Hong Kong in 2004 and he focused on various molecular materials (with Prof. Chi-Ming Che and his group) for electronic device applications. Currently, he is an Assistant Professor in City University of Hong Kong.