2010 Fiscal Year Final Research Report

pgrading electronic functions of semiconducting polymers based on clean doping

Research Project

Project/Area Number	20550162
Research Category	Grant-in-Aid for Scientific Research (C)
Allocation Type	Single-year Grants
Section	一般
Research Field	Functional materials/Devices
Research Institution	Shinshu University
Principal Investigator	ICHIKAWA Musubu Shinshu University, 繊維学部, 准教授 (80324242)
Project Period (FY)	2008 – 2010
Keywords	有機トランジスタ / ポリマートランジスタ / ポリチオフェン / 貧溶媒効果 / 電荷移動相互作用
Research Abstract	We investigated the effects of volatile additives, trifluoromethylbenzene (TFMB) in the solutions used to prepare thin-film transistors (TFTs) of regioregular poly(3-hexylthiophene) (P3HT). The additives improve the performance of the resulting TFTs when the boiling point (Tb) of the major solvent is lower than that of the additive. The relative Tb of the solvent and additive affected the film formation, with the TFMB remaining at the final stage of thin film deposition influencing the precipitation of P3HT aggregates. In addition, charge transfer interactions between P3HT and TFMB may also improve the performance of the resulting TFTs from another experiment using methylcyclohexane, a saturated hydrocarbon, as the volatile additive, whose Tb is almost the same as TFMB.