Subtractive contact-patterning of molecular organic films

An array of optoelectronic applications requires micro- and nanoscale patterning of molecular organic films. A subtractive patterning technique is developed to define micron-sized features of nanometer range thickness on a variety of hole transporting and hole blocking materials. Lateral resolution of patterned features is controlled by micron-scale stamp shapes, while the removal of the patterned nanoscale film thicknesses (sub-10 nm to over 40 nm) is correlated to strength of interfacial and intermolecular forces. Using this process, a multi-color organic light-emitting device is fabricated, demonstrating the ability of contact patterning to manipulate organic molecular films on the micro- and nanoscales.

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► Contact-patterning produces micron-scale features with nanometer-scale thickness accuracy.
► Patterning depends on interfacial and intermolecular forces.
► A multicolored OLED is fabricated via one patterning step.