Novel carbazole-based multifunctional materials with a hybridized local and charge-transfer excited state acting as deep-blue emitters and phosphorescent hosts for highly efficient organic light-emitting diodes

Abstract

Two novel multifunctional HLCT materials, namely OCI and OCT, were presented and they proved to be better green hosts than CBP. Acting as a deep-blue emitter, the OCI-based device achieved an EQE of 5.06% and CIEy < 0.04 with an EL peak at 424 nm.