Low Spin-Casting Solution Temperatures Enhance the Molecular Ordering in Polythiophene Films

Bulletin of the Korean chemical society

Hwa Sung Lee¹  Wi Hyoung Lee¹  Yeong Don Park¹ 

关键词: Molecular ordering;    Polythiophene;    Organic field-effect transistors;    Solubility;    P3HT;   

DOI  :  

学科分类：化学（综合）

来源: Korean Chemical Society

【 摘 要 】

High-crystallinity poly(3-hexylthiophene) (P3HT) thin films were prepared by aging the precursor solutions, prepared using a good solvent, chloroform, at low temperatures prior to spin-casting. Lower solution temperatures significantly improved the molecular ordering in the spin-cast P3HT films and, therefore, the electrical properties of field-effect transistors prepared using these films. Solution cooling enhanced the electrical properties by shifting the P3HT configuration equilibrium away from random coils and toward more ordered aggregates. At room temperature, the P3HT molecules were completely solvated in chloroform and adopted a random coil conformation. Upon cooling, however, the chloroform poorly solvated the P3HT molecules, favoring the formation of ordered P3HT aggregates, which then yielded more highly crystalline molecular ordering in the P3HT thin films produced from the solution.

【 授权许可】

Unknown