Large area polymer semiconductor sub-microwire arrays by coaxial focused electrohydrodynamic jet printing for high-performance OFETs

Large area and highly aligned polymer semiconductor sub-microwires were fabricated using the coaxial focused electrohydrodynamic jet printing technology. As indicated by the results, the sub-microwire arrays have smooth morphology, well reproducibility and controllable with a width of similar to 110 nm. Analysis shows that the molecular chains inside the sub-microwires mainly exhibited edge-on arrangement and the pi-stacking direction (010) of the majority of crystals is parallel to the long axis of the sub-microwires. Sub-microwires based organic field effect transistors showed high mobility with an average of 1.9 cm(2) V-1 s(-1), approximately 5 times higher than that of thin film based organic field effect transistors. In addition, the number of sub-microwires can be conveniently controlled by the printing technique, which can subsequently concisely control the performance of organic field effect transistors. This work demonstrates that sub-microwires fabricated by the coaxial focused electrohydrodynamic jet printing technology create an alternative path for the applications of high-performance organic flexible device.

Automated summary

Large area and highly aligned polymer semiconductor sub-microwires were fabricated using the coaxial focused electrohydrodynamic jet printing technology. The sub-microwires exhibited smooth morphology, high reproducibility, and controllable width. The organic field effect transistors based on sub-microwires showed significantly higher mobility compared to thin film based devices and the printing technique allows for convenient control of the number of sub-microwires, thereby controlling the performance of the transistors.