title: Growth of Highly Oriented Ultrathin Crystalline Organic Microstripes: Effect of Alkyl Chain Length.
abstract: The growth of organic semiconductor with controllable morphology is a crucial issue for achieving high-performance devices. Here we present the systematic study of the effect of the alkyl chain attached to the functional entity on controlling the growth of oriented microcrystals by dip-coating. Alkylated DTBDT-based molecules with variable chain lengths from n-butyl to n-dodecyl formed into one-dimensional micro- or nanostripe crystals at different pulling speeds. The alignment and ordering are significantly varied with alkyl chain length, as is the transistor performance. Highly uniform oriented and higher-molecular-order crystalline stripes with improved field-effect mobility can be achieved with an alkyl-chain length of around 6. We attribute this effect to the alkyl-chain-length-dependent packing, solubility, and self-assembly behavior.
authors.forename: Tao
authors.initials: T
authors.lastname: Zhu
authors.forename: Chengliang
authors.initials: C
authors.lastname: Xiao
authors.forename: Binghao
authors.initials: B
authors.lastname: Wang
authors.forename: Xiaorong
authors.initials: X
authors.lastname: Hu
authors.forename: Zi
authors.initials: Z
authors.lastname: Wang
authors.forename: Jian
authors.initials: J
authors.lastname: Fan
authors.forename: Lizhen
authors.initials: L
authors.lastname: Huang
authors.affiliation: State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences , Changchun 130022, P.R. China.
authors.forename: Donghang
authors.initials: D
authors.lastname: Yan
authors.forename: Lifeng
authors.initials: L
authors.lastname: Chi