title: Alkyl chain length dependence of the field-effect mobility in novel anthracene derivatives.
abstract: We report six asymmetric alkylated anthracene-based molecules with different alkyl side chain lengths for use in organic field-effect transistors (OFETs). Alkyl side chains can potentially improve the solubility and processability of anthracene derivatives. The crystallinity and charge mobility of the anthracene derivatives may be improved by optimizing the side chain length. The highest field-effect mobility of the devices prepared here was 0.55 cm(2)/(V s), for 2-(p-pentylphenylethynyl)anthracene (PPEA). The moderate side chain length appeared to be optimal for promoting self-organization among asymmetric anthracene derivatives in OFETs, and was certainly better than the short or long alkyl side chain lengths, as confirmed by X-ray diffraction measurements.
authors.affiliation: School of Materials Science & Engineering, Engineering Research Institute (ERI), Gyeongsang National University , Jinju 660-701, Republic of Korea.
authors.forename: Jang Yeol
authors.initials: JY
authors.lastname: Back
authors.forename: Tae Kyu
authors.initials: TK
authors.lastname: An
authors.forename: Ye Rim
authors.initials: YR
authors.lastname: Cheon
authors.forename: Hyojung
authors.initials: H
authors.lastname: Cha
authors.forename: Jaeyoung
authors.initials: J
authors.lastname: Jang
authors.forename: Yebyeol
authors.initials: Y
authors.lastname: Kim
authors.forename: Yonghwa
authors.initials: Y
authors.lastname: Baek
authors.forename: Dae Sung
authors.initials: DS
authors.lastname: Chung
authors.forename: Soon-Ki
authors.initials: SK
authors.lastname: Kwon
authors.forename: Chan Eon
authors.initials: CE
authors.lastname: Park
authors.forename: Yun-Hi
authors.initials: YH
authors.lastname: Kim
keywords: alkyl chain length; asymmetric anthracene; crystal orientation; organic field-effect transistor (OFET); structure−mobility relationship