Maskless integration of nano lens arrays (NLAs) on inverted top emitting organic light emitting diodes (TEOLEDs) for high light extraction efficiency

We report enhancement of light extraction efficiency of inverted TEOLEDs by maskless integration of submicron sized N,N’-Di(1-naphthyl)-N,N’-diphenyl-(1,1’-biphenyl)-4,4’-diamine (NPB) NLAs, formed by controlling wettability of NPB on top electrode.