Nickel oxide nano-particles replacing of hole injection layer in organic light-emitting diodes

We synthesized nickel oxide (NiOx) nanoparticles (NPs) via reversed micelle process rendering the work function of ITO anode increased to improve hole injection capability of ITO and getting rid of current HILs in organic light-emitting diodes(OLEDs) and observed their electrical properties through hole only device(HOD) tests.