Air Stable HyLEDs Using Efficient Electron Injection and Emitting Materials

Efficient hybrid organic inorganic light emitting diodes with an electron injection layer of 3.8 nm sized zinc oxide nanomaterials and their different emissive layers of phenanthrimidazole derivatives such as 2-phenyl-1-(3,5-dimethylphenyl) or 2-(<i>p</i>-trifluoromethylphenyl)-1-(naphthalen-1-yl) or 2-(<i>p</i>-methylphenyl)-1-naphthalen-1-yl-1H-phenanthro­[9,10-d]­imidazoles have been fabricated. The electroluminescent performances of the fabricated devices increased when compared to the reference devices. The ZnO nanolayer with 26 nm thickness and 2-(<i>p</i>-trifluoromethylphenyl)-1-(naphthalen-1-yl)-1H-phenanthro­[9,10-d]­imidazole as emissive material enhances current efficiency (η_c: 19.5 cd/A), power efficiency (η_p: 9.9 lm W^–1), external quantum efficiency (η_ex: 13.8%), and luminescence (L: 17345 cd/m²)