Title| Advanced Functional Carbon Based Semiconductors for Flexible and Future 3D Printed Electronics

Speaker| Prashant Sonar, Associate Professor of Queensland University of Technology (QUT), Brisbane, Australia.

Date| 25 June 2018 (Tuesday)

Time| 1400 – 1500

Venue| Think Tank 20, Building 2, Level 3 (2.305)


Carbon based semiconductors are the focus of intense academic and industrial research because they are important functional materials for low cost printable and organic electronic devices, particularly for organic thin-film transistors (OTFTs), organic photovoltaic (OPVs), organic light emitting diodes (OLEDs). Such devices can be used for the light emitting display, energy harvesting, chemical sensors, memory elements and logic circuits using various substrates including flexible plastic for upcoming wearable and printed electronics. The active organic semiconducting materials are emerging due to their ink formulation capability, tunable light absorption/emission, interesting charge transport properties and relatively adequate HOMO-LUMO energies. Photophysical, electrochemical, morphological and electrical properties of these semiconductors are primarily controlled by the modulation in chemical structures by selecting suitable conjugated chemical moieties. Conjugated π-functional low band gap polymeric semi-conductors constructed using fused aromatic building blocks is a suitable choice for high performance organic electronics devices.

In my talk, I will explain how the currently used low cost dyes as a cheap source for constructing various classes of valuable carbon based semiconductors (polymers/small molecules). In this presentation, the design, synthesis, optoelectronic properties, solid state interactions and device performance of these novel high performance organic semiconductors developed in my research group will be discussed. These newly developed materials successfully used in wide range of devices ranging from thin film transistors, perovskite/organic solar cells, and chemical sensors to light emitting display devices. These materials holds a great promises for stretchable and future 3D printed electronics..



Prashant Sonar is currently an Associate Professor and ARC Future Fellow at Queensland University of Technology (QUT), Brisbane, Australia. He performed doctoral work at Max- Planck Institute of Polymer Research, Mainz, Germany and was awarded his PhD in 2004. Dr. Sonar did his first postdoctoral study at Swiss Federal Institute of Technology (ETH), Zurich, Switzerland from 2004 till 2006. From August 2006 till 2014, he was working as a Research Scientist at Institute of Materials Research and Engineering (IMRE), Agency of Science, Technology and Research (A*STAR), Singapore. He received Future Fellowship (2013) from the Australian Research Council and was appointed as Associate Professor in July 2014 at QUT. At QUT, he established Organic and Printed Electronic Research group and Organic Electronic Device lab for synthesizing conjugated organic conducting and semiconducting materials and making various devices  thereof. Currently, he is serving as an Editorial board member of the journal Flexible and Printed Electronics, Materials Research Express (Institute of Physics, London), Energies (MDP and recently became a Fellow of Royal Chemical Society (FRSC). He has published more than 125 publications with H-index of 36 (Google Scholar) and received more than 5400 citations. A/Prof. Sonar is interested in design and synthesis of novel π-functional semiconducting and conducing polymers for printed electronics, (organic field effect transistors, organic light emitting diodes, organic solar cells, organic light emitting transistors, organic photodiodes, and sensors) bioelectronics and supramoleculecular electronic applications.