High performance organic light-emitting diodes employing ITO-free and flexible TiO /Ag/Al:ZnO electrodes.

The broad application of flexible optoelectronic devices is still hampered by the lack of an ITO-free and highly flexible transparent electrode. Dielectric/metal/dielectric (DMD) transparent electrodes are promising candidates to replace ITO, especially in flexible devices due to their mechanical stability to bending, high optical transmittance and low sheet resistance (<6 Ω sq). This paper reports on organic light emitting diodes (OLEDs) employing a DMD electrode, specifically TiO /Ag/Al:ZnO (doped with 2 wt% AlO) fabricated by sputter deposition, together with a solution-processed organic polymeric emitting layer.

Gentle plasma process for embedded silver-nanowire flexible transparent electrodes on temperature-sensitive polymer substrates.

The present study investigates processing routes to obtain highly conductive and transparent electrodes of silver nanowires (AgNWs) on flexible polyethylene terephthalate (PET) substrate. The AgNWs are embedded into a UV-curable polymer to reduce the electrode roughness and enhance its stability. For the purpose of device integration, the AgNWs must partially protrude from the polymer, which demands that their embedding is followed by a transfer step from a host substrate to the final substrate.