Systematic Study on the Morphological Development of Blade-Coated Conjugated Polymer Thin Films via In Situ Measurements

• DOI: 10.1021/acsami.0c07385
• Publication Date: 2020-07-07T07:49:04Z
• Authors: Yeon-Ju Kim; Sehyun Lee; Muhammad. R. Niazi; Kyoungtae Hwang; Ming-Chun Tang; Dae-Hee Lim; Ji-Sue Kang; Detlef-M. Smilgies; Aram Amassian; Dong-Yu Kim
• Keywords: Wide-angle X-ray scattering

The morphology of conjugated polymer thin films, determined by the kinetics film drying, is closely correlated with their electrical properties. Herein, we focused on dramatic changes in thin-film blade-coated poly{[N,N'-bis(2-octyldodecyl)-naphthalene-1,4,5,8-bis(dicarboximide)-2,6-diyl]-alt-5,5'-(2,2'-bithiophene)} caused effect solvent and coating temperature. Through situ measurements, evolution aggregates crystallites, which plays a decisive role formation charge-transport pathway, was observed real time. By combining ultraviolet-visible spectroscopy grazing-incidence wide-angle X-ray scattering analysis, could identify five distinct stages during blade-coating process; these were irrespective temperature used. are described detail proposed model formation. This insight an important step understanding relationship between films properties as well optimizing structural films.