Graduate Student Oral Session (I) (English)
[O9-1]
우수논문발표상 응모자Structural Control of Chiral NFAs via Thermal Annealing and End-Group Engineering for g-Factor Modulation in Vertical OFETs
발표자김광민 (울산과학기술원)
연구책임자김봉수 (울산과학기술원)
Abstract
Organic field-effect transistors (OFETs) for circularly polarized light (CPL) detection are gaining attention for chiroptoelectronic applications. We report a vertical-type OFET system based on non-fullerene acceptors (NFAs) with chiral alkyl side chains, designed to achieve both high g-factor and detectivity. We investigated the effect of thermal annealing and end-group variation on the chiroptical and electrical performance of the devices. IC2F-based devices showed enhanced g-factor (–0.1) and detectivity (4.9 × 10¹¹ Jones) after annealing. In contrast, IC2Cl-based devices showed minimal change, indicating that end-group structure significantly affects molecular packing. These results highlight that combining end-group design, and thermal treatment is key to optimizing CPL-sensitive OFETs. This study offers a design strategy for CPL photodetectors based on chiral organic semiconductors and insight into how structural factors influence chiroptical performance.