Korea-Taiwan Joint Symposium: Advanced Polymer Science and Engineering (English)
발표 구분
초청강연
제목
Influences of Structure Defects on the Performances of Solution-Processed OFET
발표자
()
초록
내용
The quality of charge-transport channel strongly affects the performances of organic field-effect transistors (OFET). To achieve higher charge mobility, solution-processed single-crystal (SPSC) techniques have been used to build up crystal arrays of conjugated molecules as effective charge-transport channels. Nevertheless, subtle structural defects in the crystal arrays truncate the charge-transport pathway and affect the OFET mobility. In this presentation, characterization procedures to identify the low-angle grain boundary (LAGB), polymorphism, and crystallinity of the crystal arrays of conjugated molecules will be demonstrated. Following that, the influences of lattice alignment, packing structure and crystallinity on the OFET mobility will be discussed. It was found that (1) unification the lattice orientation and packing structure, and (2) continuity of the crystalline domain play important roles in the performances and reproducibility of the solution-processed OFETs.