William Mong Distinguished Lecture
by Professor Jun Takeya
Sep 25, 2019
Professor Jun Takeya, Professor in Department of Advanced Materials Science, Graduate School of Frontier Sciences, University of Tokyo, delivered a lecture titled "Physics, materials and applications of high-mobility organic semiconductors and flexible circuit applications" on September 25, 2019.
In the lecture, Professor Takeya discussed the mechanism of charge transport in conjunction with molecular-scale charge transfer. Stimulated by the experiments, materials such as decyldinaphthobenzo-dithiophene derivatives (Cn-DNBDT) are newly synthesized to stabilize the molecular position in the crystal form by introducing steric hindrance in their p-conjugated cores. With the development of solution-crystallization method, wafer scale arrays based on the single crystal transistors are formed on plastic substrates. The presentation also focused on recent development of key technologies for printed LSIs which can provide future low-cost platforms for RFID tags, AD converters, data processors, and sensing circuitries. With excellent chemical and thermal stability in recently developed new materials, Professor Takeya's team is developing simple integrated devices based on CMOS using p-type and n-type printed organic FETs. Successful rectification and identification are demonstrated at 13.56 MHz with printed organic CMOS circuits.