CPOS Seminar: "Organic electrochemical transistors (OECT) based on self-doped conjugated polyelectrolytes with different molecular weights and backbone structures"

Speaker: SANGMIN CHAE, Graduate Student Researcher, Chemistry and Biochemistry Department, UCSB

Abstract: Organic electrochemical transistors (OECT) have been attracting lots of attention due to its potential for future applications such as biosensors for neurotransmitters, DNAs and metabolites. Most studies related to OECT devices have been conducted by employing PEDOT:PSS which is a commercially available conducting polymer. Recently, we demonstrated that self-doped conjugated polyelectrolyte (CPE) is a good candidate as the active material for the OECT device, and it has a unique device behavior during the operation. In this seminar, I will present two parts. Part Ⅰ, the investigation of a representative self-doped CPE (PCPDTBTSO3K) with different molecular weights, and their OECT characteristics will be shown. Part Ⅱ, we synthesized four CPEs with different structures by substituting the benzothiadiazole (BT) unit with phenyl (Ph), thiophene (Th), and benzoxadiazole (BZ). Their physical, electrochemical and OECT properties will be presented.