Abstract

The pursuit of low-cost, high-performanceelectronic applications with solution-processible organic semiconductors drives thedevelopment of efficient methods to pattern organic semiconductor singlecrystals (OSSCs). However, fluid instabilities and a complex evaporation process havelimited patterning of OSSCs with high resolution. Here, we present a solvent-free patterning approach,capillary force-driven molecule flow (CFDMF), to achieve highly aligned2,7-dioctyl[1]benzothieno[3,2-b][1]benzothiophene (C8-BTBT) single crystalpatterns with sub-micron resolution and high fidelity. The position as well aspattern shape and resolution of the C8-BTBT single crystal arrays can bepredetermined through photolithography. Using this method, we have demonstrateda high-integration circuit comprising over 169 organic field-effect transistors(OFETs) with a high resolution of 310 dpi. The resultant OFETs show goodfield-effect properties with an average mobility of 4.44 cm² V^-1 s^-1. This patterning technique constitutes a major step toward theuse of the high-mobility OSSCs for integrated device applications.