Photonic Quasi Crystal embedded into Organic Electrode and its employment in Optoelectronic Devices
Giuseppe NENNA (ENEA)
In this work we realize photonic quasi crystal patterns directly on the polymeric electrodes. In particular, we realized and characterized different PQCs (Photonic Quasi Crystal) polymeric electrode with different patterns (octagonal, dodecagonal and Thue-Morse). As reported in literature, it is widely known that one of the best strategies to increase the efficiency factor in OLED (Organic Light Emitting Diode) devices is related to the use of photonic crystal or photonic quasi-crystal structures. An optical setup was developed and adopted to evaluate the PQCs polymeric electrode properties and estimate the possible spectral modification and emission enhancement of polymeric White-OLED devices. This apparatus has been used to analyze the optical properties of our photonic structures in order to evaluate the spectral extraction and the operational optical ranges. We demonstrated the possibility to obtain a remarkable efficiency gain using PQCs nanostructures in highly conductive PEDOT:PSS polymer electrode reaching for white light emission an improvement higher than 60%.
