Efficient Single‐Layer Polymer Light‐Emitting Diodes

Single-layer polymer light-emitting diodes are fabricated using poly (9,9′-dioctylfluorene)-co- benzothiadiazole (F8BT) as the emissive layer in contact with metal oxide injection layers ITO/ZnO/Cs2CO3/F8BT/MoO3/Au. Luminous efficiencies of up to 23 cd A−1 are achieved for polymer layer thicknesses near 1 μm.