Organic field effect transistors (OFETs) are the key players of the next generation flexible electronics. In this talk, I will focus on the meniscus guided coating (MGC) method for the OFET fabrications. If one can control the coating parameters well, the MGC method can ensure excellent crystallinity in the small molecules OFETS. This method is also highly compatible with large area deposition for mass production. Four elementary processing parameters (i) shearing speed (v), (ii) solute concentration, (iii) deposition temperature (T) and, (iv) solvent boiling point (Tb) are utilized to analyze crystal growth behavior in the meniscus-guided coating. I will also provide a generalized formula to estimate the effects of these fabrication parameters which can serve as the crystal growth guidelines for the MGC approach. I will also discuss how to use the ultra-low speed version of MGC to develop 2D monolayer organic crystal and long range in-plane ordering.
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