2015/09/30 by Jing Wan, Wan, Jing, Yang Li +12
Engineering · Materials Science · Physics and Astronomy · #FOS: Physical sciences #Liquid Crystal Research Advancements #Materials Science (cond-mat.mtrl-sci) #Nanofabrication and Lithography Techniques #Organic Electronics and Photovoltaics #cond-mat.mtrl-sci
paper · pdf · doi:10.48550/arxiv.1509.09250
5 pages, 5 figures
arxiv created 2015/09/30 · openalex publication_date 2015/09/30 · arxiv updated 2015/10/01 · openalex created_date 2019/06/27 · openalex updated_date 2026/07/28
We report an in-situ microbeam grazing incidence X-ray scattering study of 2,7-dioctyl[1]benzothieno[3,2-b][1]benzothiophene (C8-BTBT) organic semiconductor thin film deposition by hollow pen writing. Multiple transient phases are observed during the crystallization for substrate temperatures up to ≈93^∘C. The layered smectic liquid-crystalline phase of C8-BTBT initially forms and preceedes inter-layer ordering, followed by a transient crystalline phase for temperature >60^∘C, and ultimately the stable phase. Based on these results, we demonstrate a method to produce extremely large grain size and high carrier mobility during high-speed processing. For high writing speed (25 mm/s) mobility up to 3.0 cm2/V-s has been observed.