Semiconducting π-Conjugated Systems in Field-Effect Transistors: A Material Odyssey of Organic Electronics

A study was conducted to demonstrate the performance analysis of π-conjugated systems in organic field-effect transistors (OFET). The performance analysis made it possible to extract information regarding the fundamental merit of semiconducting π-conjugated materials and captured what is needed for new materials and what was the synthesis orientation of new π-conjugated systems. The investigations revealed that the device configuration played a key role in the device performance. It was found that devices of the type B and D gave better performances than that of devices A and C. This was attributed to the improved contact between the organic semiconductor and the electrodes. It was certain that other factors, such as the semiconductor layer, the materials used for the electrodes and the gate insulator, the interface, and energy alignments between the organic semiconductor and the gate insulator or between the organic semiconductor and the electrodes played crucial roles in the performance of OFETs.