Effect of hydroxyl density on condensation behaviors of self-assembled monolayers and performance of pentacene-base organic thin-film transistors

► The preparation conditions of self-assembled monolayers (SAMs) have significant impact on the morphologies of SAMs. ► The treatment of SiO2 substrates with O2 plasma enhances the hole mobility of OFET by twice. ► The preparation temperatures of SAMs have significant impact on the performance of OFETs.