Abstract
Homogeneous pinhole‐free functional films are essential in the manufacturing of large‐area high‐performance flexible electronics. Mayer rod coating is used to create high‐quality organic electroluminescent (EL) films herein. Various factors that affect the film quality of Mayer rod coating, including Mayer rod coating processing, solvent engineering, emitting material concentrations, and the ionic conductor proportions, are systematically investigated and optimized. Accordingly, uniform large‐area EL polymer films are achieved using Mayer rod coating. Meanwhile, large‐area polymer‐based light‐emitting electrochemical cells (PLECs) manufactured by printing methodology are successfully constructed. The resulting printed large‐area PLECs manifest enhanced performance by a factor of 2.37 compared with the corresponding spin‐cast counterparts.
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