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Issue 2, 2020
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A bipolar host based high triplet energy electroplex for an over 10 000 h lifetime in pure blue phosphorescent organic light-emitting diodes

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Abstract

Ultimate device performances of blue phosphorescent organic light-emitting diodes, an external quantum efficiency of 27.6%, a device lifetime over 10 000 h at 100 cd m−2, and pure blue color coordinates of (0.12, 0.13), were simultaneously achieved using a device architecture employing an electroplex host. A high triplet energy electron transport type host derived from a triazine core, a carbazole substituent, and a triphenylsilyl blocking unit was newly synthesized for the purpose of developing the high emission energy electroplex host. The electroplex host functioned as a carrier balancing host for high external quantum efficiency and a lifetime extending host of pure blue phosphorescent organic light-emitting diodes. This work demonstrates ultimate device performances, high external quantum efficiency and long lifetime, in pure blue phosphorescent organic light-emitting diodes. In particular, the lifetime limit of pure blue phosphorescent organic light-emitting diodes was overcome by demonstrating an over 10 000 h lifetime.

Graphical abstract: A bipolar host based high triplet energy electroplex for an over 10 000 h lifetime in pure blue phosphorescent organic light-emitting diodes

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Article information


Submitted
14 Aug 2019
Accepted
11 Oct 2019
First published
14 Oct 2019

Mater. Horiz., 2020,7, 559-565
Article type
Communication

A bipolar host based high triplet energy electroplex for an over 10 000 h lifetime in pure blue phosphorescent organic light-emitting diodes

M. Jung, K. H. Lee, J. Y. Lee and T. Kim, Mater. Horiz., 2020, 7, 559
DOI: 10.1039/C9MH01268K

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