Simple and high-throughput fabrication of large-area and multilayer flexible polymer film structures for microfluidic organic light emitting diode

A simple and high-throughput fabrication of large-area and multilayer polymer film structures was developed and applied for microfluidic organic light emitting diodes (OLED). We employed following three distinguished technologies, a) screen-printing technique for transparent electrodes, b) novel belt-transfer exposure technology for SU-8 microchannels, and c) heterogeneous low temperature bonding technology using self-assembly monolayer. A Liquid organic semiconductor as a liquid emitter was injected to each microchannel and photoluminescence and electroluminescence were obtained not only in a straight state, but also in a bending state. This large-area flexible microfluidic structure for OLED is applicable to nondisposable posters or displays which can be adopted around the curved surfaces of the various structures.