Recent Progress of Host Materials for Highly Efficient Blue Phosphorescent OLEDs

doi:10.6023/A14100716

Abstract

Phosphorescent organic light-emitting diodes (PHOLEDs) show a bright future for flat-panel displays and solid- state lighting due to higher quantum efficiencies compared with traditional fluorescent OLEDs. This review focuses on small-molecular organic host materials for blue PHOLEDs with external quantum efficiency higher than 20%. Hole transport-type, electron transport-type and bipolar transport hosts are introduced according to their charge transporting properties. Their molecular structures and physical properties such as triplet energy, HOMO/LUMO energy levels and thermal stabilities, as well as device performances of host materials for blue and deep-blue PHOLEDs are comprehensively demonstrated. It is expected to provide reference value for the exploitation of new organic host materials and the commercialization of OLEDs.

Key words: organic electroluminescence, phosphorescence, blue, external quantum efficiency, host

Cite this article

Wang Fangfang, Tao Youtian, Huang Wei. Recent Progress of Host Materials for Highly Efficient Blue Phosphorescent OLEDs[J]. Acta Chimica Sinica, 2015, 73(1): 9-22.

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