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

Idris, Muazzam; Coburn, Caleb; Fleetham, Tyler; Milam-Guerrero, JoAnna; Djurovich, Peter I.; Forrest, Stephen R.; Thompson, Mark E.

doi:10.1039/c9mh00195f

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

Journal Article · Thu Feb 28 23:00:00 EST 2019 · Materials Horizons

DOI:https://doi.org/10.1039/c9mh00195f· OSTI ID:1735848

^[1]; Coburn, Caleb ^[2]; Fleetham, Tyler ^[3]; Milam-Guerrero, JoAnna ^[3]; ^[3]; Forrest, Stephen R. ^[2]; ^[3]

Univ. of Southern California, Los Angeles, CA (United States); University of Southern California
Univ. of Michigan, Ann Arbor, MI (United States)
Univ. of Southern California, Los Angeles, CA (United States)

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. Here, 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%.

View Accepted Manuscript (DOE)

Research Organization:: Univ. of Southern California, Los Angeles, CA (United States)

Sponsoring Organization:: USDOE Office of Energy Efficiency and Renewable Energy (EERE), Energy Efficiency Office. Building Technologies Office

Grant/Contract Number:: EE0007077; EE0007626

OSTI ID:: 1735848

Alternate ID(s):: OSTI ID: 1614017
OSTI ID: 1498805

Journal Information:: Materials Horizons, Journal Name: Materials Horizons Journal Issue: 6 Vol. 6; ISSN 2051-6347

Publisher:: Royal Society of ChemistryCopyright Statement

Country of Publication:: United States

Language:: English

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32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
36 MATERIALS SCIENCE
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host material
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