Abstract
Charge transport in organic semiconductors is heavily influenced by their solid-state packing. To separate intermolecular packing effects from molecular electronic effects, we have synthesized two polymorphs of crystalline thienothiophene-thiazolothiazole trimers and studied them by DFT calculations, optical spectroscopy, single-crystal X-ray diffraction and charge-transport measurements in field-effect transistors. One polymorph was found to be a p-type semiconductor with a hole mobility of 3.3×10(-3) cm(2) V(-1) s(-1) , while the other was insulating. The different charge-transport behavior and optical properties of the two polymorphs are strongly related to the topology of their π-stacks. Subtle differences between the polymorphs, including S⋅⋅⋅S close contacts and bond-length alternation are also discussed for their possible effects on charge transport.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: Chemphyschem : a European journal of chemical physics and physical chemistry
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
