Surface effects on network formation of conjugated polymer wrapped semiconducting single walled carbon nanotubes and thin film transistor performance

Abstract

SWCNT network morphology and TFT performance of polyfluorene wrapped sc-SWCNT on different substrates is reported. The polymer/tube weight ratio and concentration impacts network formation and device performance. Hydrophilic SiO<inf>2</inf> surfaces show stronger adsorption compared to poly-l-lysine treated SiO<inf>2</inf>, which leads to more uniform and higher density networks. TFTs with mobility up to 38 cm2/Vs with <10% variability and on/off ratios on the order of 105 were obtained using an iterative dip-coating process.Peer reviewed: YesNRC publication: Ye