USTA Hakan Abdullah Gul University

Development of Novel Polymer Semiconductors for Organic Thin-Film Transistors

Co-authors NEWMAN Chris, CHEN Zhihua, FACCHETTI Antonio

During the past two decades, design, synthesis and characterization of functional materials based on organic pi-conjugated polymers received major scientific and technological attention. Thin films prepared by these materials form favorable nanostructures, which can be used in a variety of optoelectronic applications such as organic photovoltaic cells (OPVs), thin-film transistors (OTFTs), and organic light-emitting transistors (OLETs). Compared to inorganic-based electronics, these materials enable proper ink formulations for low-cost, high-throughput printing processes on large-area, light-weight, and flexible plastic subtrates. Owing to their unique features, they are envisioned as essential components of next-generation optoelectronic devices such as flexible displays, low-cost solar panels, electronic papers, printable RFID tags, and sensors. These new technologies will revolutionize the role of electronics in our daily lives and compliment current inorganic-based optoelectronic devices, which greatly impacted our society starting from the second half of the 20th century. This study demonstrates theory-aided rational design, synthesis, and characterization of a new family of functional organic polymers p-type and ambipolar semiconductors. We also report the application of these new polymers into Organic Thin-Film Transistors, which exhibit electron/hole mobilities of >0.1 cm2/V·s. Additionally, we found important correlations between polymer backbone structures, physicochemical properties, and device performances, providing detailed insight into charge transport characteristics. The advances we have made toward realizing truly high-performance and air-stable optoelectronic devices affirm the possibility of achieving low-cost microelectronic devices through rational materials development.