Preparation of nickel oxide on recessed ITO anodes for OLED applications

Abstract

Optical, electrical and surface morphological properties of nickel oxide (NiOx)/recessed indium tin oxide (ITO) films were examined to realize their suitability for serving as an anode of OLEDs. Results showed that adding a top NiOx layer allows recessed ITO to exhibit slightly higher optical effects but degraded its electrical conductance. Due to the largely elevated surface work function with this NiOx interlayer recessed OLED exhibited improved current efficiency.