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Indoloindole as a new building block of hole transport type host for stable operation in the phosphorescent organic light-emitting diodes

Abstract

An organic material for application as a p-type host of phosphorescent organic light-emitting diodes was newly developed using an indoloindole moiety as a hole transport unit. The indoloindole derived organic material showed better hole transport property than a common carbazole based organic material. The good hole transport property of the indoloindole derivative allowed the use of it as the p-type host material in the exciplex type mixed host of phosphorescent organic light-emitting diodes. The new host extended the lifetime of the yellow phosphorescent OLEDs by more than 10 times compared with a conventional p-type host while achieving the similar external quantum efficiency.

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Publication details

The article was received on 05 Feb 2019, accepted on 11 Apr 2019 and first published on 11 Apr 2019


Article type: Paper
DOI: 10.1039/C9TC00701F
Citation: J. Mater. Chem. C, 2019, Accepted Manuscript

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    Indoloindole as a new building block of hole transport type host for stable operation in the phosphorescent organic light-emitting diodes

    H. L. Lee, K. H. Lee and J. Y. Lee, J. Mater. Chem. C, 2019, Accepted Manuscript , DOI: 10.1039/C9TC00701F

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