Highly electron deficient pyrido[3′,2′:4,5]furo[2,3-b]pyridine as a core structure of a triplet host material for high efficiency green phosphorescent organic light-emitting diodes

Highly electron deficient pyrido[3',2':4,5]furo[2,3-b]pyridine (PFP) was developed as a core structure of a triplet host material and a derivative of PFP, 3-(3-(carbazole-9-yl)phenyl) pyrido[3',2':4,5]furo[2,3-b]pyridine (CzPFP), was synthesized as a bipolar host material. The CzPFP host material showed similar hole and electron densities in single charge devices, and a high quantum efficiency of 27.7% and a high power efficiency of 86.8 lm W(-1) in green phosphorescent organic light-emitting diodes.