Indoloindole as a new building block of a hole transport type host for stable operation in phosphorescent organic light-emitting diodes?
Journal of Materials Chemistry C Pub Date: 2019-04-11 DOI: 10.1039/C9TC00701F
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 properties than a common carbazole based organic material. The good hole transport property of the indoloindole derivative allowed its use as a p-properties host material in an exciplex type mixed host of phosphorescent organic light-emitting diodes. The new host extended the lifetime of yellow phosphorescent OLEDs by more than 10 times compared with a conventional p-type host while achieving a similar external quantum efficiency.
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Journal Name：Journal of Materials Chemistry C
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CAS no.: 89640-58-4
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