Title: Conductive Polymer: Flexible Transparent Electrode and Application of Flexible Thermoelectric Conversion
Speaker: Pro. Jianyong Ouyang
Venue: Room 502, Building No.1, Wushan Campus
Time: Oct 24, Wednesday, 10:00-11:00
Conducting polymers were discovered in 1970s. Recent progress in conducting polymers demonstrated their important applications, such as the next-generation transparent electrode and thermoelectric materials. Optoelectronic devices require at least one electrode to be transparent. Indiun tin oxide (ITO) is traditionally used as the transparent electrode of optoelectronic devices. But ITO has problems of scarce indium on earth and poor mechanical flexibility. Conducting polymers, carbon nanotubes, graphene and metal wire grids have been proposed to be the transparent electode materials. Among them, poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) is promising to be the next-generation transparent electrode material due to its solution processability, low cost and high transparency in visible range. However, the as-prepared PEDOT:PSS film obtained from PEDOT:PSS aqueous solution usually has conductivity below 1 S cm-1, remarkably lower than ITO. Here, I will present several novel methods to significantly enhance the conductivity of PEDOT:PSS. The conductivity can be enhanced to be more than 3000 S cm-1, which is higher than that of ITO on plastic and comparable to ITO on glass. Moreover, highly conductive PEDOT:PSS can have high thermoelectric properties. They can be used for heat harvesting and cooling at low temperature..
Announced by School of Physics and Optoelectronic Technology