Efficient White Organic Light‐Emitting Devices Based on Phosphorescent Platinum(II)/Fluorescent Dual‐Emitting Layers

Efficient white organic light-emitting devices with uncomplicated architectures are fabricated employing phosphorescent platinum(II) complexes containing extended π-conjugated cyclometalated ligands as a yellow-light source, and fluorescent material 9,10-bis-(β-naphthyl)-anthrene as a blue-light source. Peak external quantum (power) efficiencies of 11.8 % (18.4 lm W–1) are demonstrated (see figure).