The excellent bipolar conjugated polymer material can both conduct electrons and holes and thus is an interesting base material for organic FETs. WAN Xiaobo and colleagues at QIBEBT used a large hindered base to successfully synthesize the thiazole isoindigo precursor, thiazole bismuth, and transformed it to thiazole Isoindigo. They further optimized the synthesis and polymerization routes, successfully synthesized polymer P (TzII-TTT) of isothiazole blue and thiophene, and studied the material’s photophysical properties and field effect transistor performance. The hole mobility of a P(TzII-TTT) bipolar field-effect transistor was 3.93 cm2V-1S-1, and the electron mobility 1.07 cm2V-1S-1, exceeding the performance of the similarly-structured pyridine isoindigo blue polymer.

CAS news release, April 28 2018