Issue 48, 2021

Cohosts with efficient host-to-emitter energy transfer for stable blue phosphorescent organic light-emitting diodes

Abstract

We present a high-performance blue phosphorescent organic light-emitting diode exhibiting a low operating voltage (4.1 V), high external quantum efficiency (23.4%, at 500 cd m−2) with a low efficiency roll-off (4.7%), and a long operation lifetime (time at which the luminance reaches 95% of its initial value, LT95 = 232 h). These are mainly attributed to a well-developed exciplex-forming cohost composed of judiciously selected component hosts. The cohost provides low injection barriers and stable transport for both positive and negative charges, excellent charge balance, and finely tuned exciplex energy for efficient host-to-emitter energy transfer.

Graphical abstract: Cohosts with efficient host-to-emitter energy transfer for stable blue phosphorescent organic light-emitting diodes

Supplementary files

Article information

Article type
Paper
Submitted
30 Sept. 2021
Accepted
11 Nov. 2021
First published
11 Nov. 2021

J. Mater. Chem. C, 2021,9, 17412-17418

Cohosts with efficient host-to-emitter energy transfer for stable blue phosphorescent organic light-emitting diodes

S. Ihn, E. S. Kwon, Y. Jung, J. S. Kim, S. Nam, J. Kim, S. Kim, S. O. Jeon, Y. S. Chung, S. Park, D. H. Huh, H. J. Kim, H. Kang, N. Lee, H. J. Bae and H. Choi, J. Mater. Chem. C, 2021, 9, 17412 DOI: 10.1039/D1TC04680B

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