Organic alternating current electroluminescence device based on 4,4′-bis(N-phenyl-1-naphthylamino) biphenyl/1,4,5,8,9,11-hexaazatriphenylene charge generation unit
Due to the voltage division of charge generation unit (CGU), the power efficiency of tandem organic light-emitting diodes (TOLEDs) is usually lower than that of the single-unit devices, which severely...