Spray printing of organic semiconducting single crystals

Grigorios-Panagiotis Rigas, Marcia M. Payne, John E. Anthony, Peter N. Horton, Fernando A. Castro and Maxim Shkunov ()
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Grigorios-Panagiotis Rigas: Faculty of Engineering and Physical Sciences, Advanced Technology Institute, University of Surrey
Marcia M. Payne: University of Kentucky
John E. Anthony: University of Kentucky
Peter N. Horton: School of Chemistry, University of Southampton
Fernando A. Castro: National Physical Laboratory
Maxim Shkunov: Faculty of Engineering and Physical Sciences, Advanced Technology Institute, University of Surrey

Nature Communications, 2016, vol. 7, issue 1, 1-8

Abstract: Abstract Single-crystal semiconductors have been at the forefront of scientific interest for more than 70 years, serving as the backbone of electronic devices. Inorganic single crystals are typically grown from a melt using time-consuming and energy-intensive processes. Organic semiconductor single crystals, however, can be grown using solution-based methods at room temperature in air, opening up the possibility of large-scale production of inexpensive electronics targeting applications ranging from field-effect transistors and light-emitting diodes to medical X-ray detectors. Here we demonstrate a low-cost, scalable spray-printing process to fabricate high-quality organic single crystals, based on various semiconducting small molecules on virtually any substrate by combining the advantages of antisolvent crystallization and solution shearing. The crystals’ size, shape and orientation are controlled by the sheer force generated by the spray droplets’ impact onto the antisolvent’s surface. This method demonstrates the feasibility of a spray-on single-crystal organic electronics.

Date: 2016
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DOI: 10.1038/ncomms13531

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