Transient phases during fast crystallization of organic thin films from solution
Source abstract
Abstract
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.
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Research context
OpenAlex topics: Organic Electronics and Photovoltaics · Thin-Film Transistor Technologies · Liquid Crystal Research Advancements
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
University of Vermont 1 Department of Physics and Materials Science Program, , Burlington, Vermont 05405, USA
Cornell University 2 Cornell High Energy Synchrotron Source, , Ithaca, New York 14853, USA
University of Vermont 3 Department of Chemistry, , Burlington, Vermont 05405, USA
Funding
National Science Foundation
References (25)
Show source-provided references
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