Efficient blue fluorescent OLEDs based on a D–π–A emitter with the hybridized localized and charge-transfer state

We designed a D–π–A emitter, 4-(10-(4-(4,5-diphenyl-4 H -1,2,4-triazol-3-yl)phenyl)anthracen-9-yl)- N , N -diphenylaniline ( TAZ-An-TPA ), with TAZ, anthracene, triphenylamine (TPA) as acceptor, π-bridge and donor, respectively.