Improved power efficiency in deep blue phosphorescent organic light-emitting diodes using an acridine core based hole transport material

A high triplet energy hole transport material with an acridine core was synthesized as the hole transport material for deep blue phosphorescent organic light emitting diodes. The acridine core based hole transport material showed a high triplet energy of 2.89 eV for efficient triplet exciton blocking and highest occupied molecular orbital of 5.96 eV for efficient hole injection in deep blue phosphorescent organic light-emitting diodes. The acridine core based hole transport material showed low driving voltage than common high triplet energy hole transport material and power efficiency of deep blue phosphorescent organic light-emitting diodes was improved by more than 50%. (C) 2012 Elsevier B.V. All rights reserved.