Controlled formation of large-area single-crystalline TIPS-pentacene arrays through superhydrophobic micropillar flow-coating
JOURNAL OF MATERIALS CHEMISTRY C(2017)
Abstract
A convenient and controlled organic semiconductor alignment strategy, superhydrophobic micropillar flowcoating (SMFC), is presented. Patterned, large-area (>1 cm(2)) 6,13-bis(triisopropylsilylethynyl) pentacene (TIPS-pentacene) single-crystalline arrays which show hole mobilities up to 6.8 cm(2) V-1 s(-1) were obtained via this method. Crucially, the polymorphism of TIPS-pentacene was regulated by tuning the flow rate, solvent and the substrate hydrophobicity. These results indicate that this technique is reliable for creating uniform and homogenous organic single-crystalline arrays with controlled crystal packing, thickness, and position.
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Key words
large-area,single-crystalline,tips-pentacene,flow-coating
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