Carbazole is a heterocyclic tricyclic
aromatic organic compound consisting of two six-membered
benzene rings fused on either side of a five-membered
nitrogen-containing ring. A large number of carbazole
derivatives have been designed and synthesized and organic
electronic devices based on these derivatives such as
organic light emitting diodes (OLEDs), have been
investigated. The optical and electrical properties of
carbazoles are affected by substitution on the 2-, 3-, 6-,
7- and...