At present, energy is main focus of research around the world and particularly important for emerging countries where improvement in lifestyle is demanding for higher energy consumption. There are two ways to tackle this issue, either we generate more sustainable green energy or we use existing resources more efficiently. Prof. Dinesh will present his work on Molecular electronics where energy efficient lighting and solar cells is being studied to answer global energy crises. Molecular semiconductors with delocalized ?electron systems behave as model organic semiconductors. A broad programme of research on this topic exists in international laboratories by now. Activities range from design and synthesis of new polymers through to their use in a variety of devices and also to understand further insight of disordered semiconductor physics. His main interest is the semiconductor physics of these materials, which is very different from that of inorganic semiconductors and gives strong electro-optical and non-linear optical responses. A range of device-related projects he had carried out. (a) Polymer light-emitting diodes (LEDs) were first made in Cambridge using poly (phenylenevinylene), and the performance of these LEDs - now has risen to surpass that of visible emitting inorganic devices. (b) Photovoltaic and photoconductive diodes can show high efficiency if heterojunctions between polymer layers are used to achieve charge separation, power conversion efficiency from these cells are approaching <11%. (c) Sub-picosecond time-resolved spectroscopy is used to study formation and evolution of polaronic electronic excitations. This talk will give a broad overview of his research projects related to transport, structural and spectroscopy based investigations on molecular semiconductors with a brief introduction to this field.
Prof. Dinesh Kabra is from the Department of Physics, IITB. Before joining IITB, he was a Herchel Smith Postdoctoral Research Fellow for Hybrid Solar Cells Project in Cavendish Laboratory, University of Cambridge, UK. He is also an honorary postdoctoral fellow of Trinity Hall College, University of Cambridge. He did his PhD in 2007 from JNCASR, Bangalore-India to understand photo-induced charge carrier transport length scales in model conjugated polymer systems. His current research interest involves solution processable inorganic and molecular semiconductors for optoelectronic applications. He is working with hybrid photovoltaics, light emitting diode & transistors and working towards realization of electrically pumped organic laser. He has published more than 30 papers and 3 international patents on his molecular semiconductors research. His patents are licensed by CDT and Eight19 for development of active matrix display and flexible solar cell panels.