Bipolar hosts and non-doped deep-blue emitters (CIE y = 0.04) based on phenylcarbazole and 2-(2-phenyl-2H-1,2,4-triazol-3-yl)pyridine groups

Four bipolar materials using 1,2,4-triazol derivative as an acceptor and carbazole as a donor were synthesized. They can be used not only as emitters to fabricate deep-blue OLEDs, but also as hosts to construct PhOLEDs.