Indoloindole as a new building block of a hole transport type host for stable operation in phosphorescent organic light-emitting diodes. Issue 20 (30th April 2019)

• Record Type: Journal Article
• Authors: Lee, Ha Lim; Lee, Kyung Hyung; Lee, Jun Yeob
• Is Part Of: Journal of materials chemistry. Volume 7:Issue 20(2019)
• Page Start: 5988
• Page End: 5994
• Publication Date: 2019-04-30
• Subjects: Materials -- Periodicals; Chemistry, Analytic -- Periodicals; Optical materials -- Research -- Periodicals; Electronics -- Materials -- Research -- Periodicals; 543.0284
• DOI: 10.1039/c9tc00701f
• Languages: English
• ISSNs: 2050-7526

Abstract

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. 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.