Jump to main content
Jump to site search


Phenanthro[9,10-d]triazole and imidazole derivatives: high triplet energy host materials for blue phosphorescent organic light emitting devices

Author affiliations

Abstract

A class of wide bandgap host materials is introduced as an alternative to carbazole-based hosts to enhance the efficiency and transport properties of organic light emitting diodes (OLEDs). We have synthesized and investigate the photophysical and electrochemical properties of a series of phenanthrene derivatives incorporating fused triazole or imidazole rings. The resulting phenanthro[9,10-d]triazoles and phenanthro[9,10-d]imidazoles are suitable host materials for blue phosphors due to their high triplet energies and conductivities. Incorporation of bulky substituent groups leads to retention of the high triplet energies in the solid state. The most promising materials are incorporated in blue phosphorescent OLEDs that achieve external quantum efficiencies >20%.

Graphical abstract: Phenanthro[9,10-d]triazole and imidazole derivatives: high triplet energy host materials for blue phosphorescent organic light emitting devices

Back to tab navigation

Supplementary files

Publication details

The article was received on 04 Feb 2019, accepted on 01 Mar 2019 and first published on 01 Mar 2019


Article type: Communication
DOI: 10.1039/C9MH00195F
Citation: Mater. Horiz., 2019, Advance Article

  •   Request permissions

    Phenanthro[9,10-d]triazole and imidazole derivatives: high triplet energy host materials for blue phosphorescent organic light emitting devices

    M. Idris, C. Coburn, T. Fleetham, J. Milam-Guerrero, P. I. Djurovich, S. R. Forrest and M. E. Thompson, Mater. Horiz., 2019, Advance Article , DOI: 10.1039/C9MH00195F

Search articles by author

Spotlight

Advertisements