High-triplet-energy host materials derived from directly-coupled carbazole-pyridoindole moieties. (July 2016)

• Record Type: Journal Article
• Authors: Byeon, Sung Yong; Lee, Jun Yeob
• Is Part Of: Dyes and pigments. Volume 130(2016)
• Page Start: 183
• Page End: 190
• Publication Date: 2016-07
• Subjects: Carbazole -- Pyridoindole -- Host material -- Phosphorescent device -- Quantum efficiency -- Substitution position; Dyes and dyeing -- Periodicals; Pigments -- Periodicals; 667.2
• DOI: 10.1016/j.dyepig.2016.03.004
• Languages: English
• ISSNs: 0143-7208

Abstract

Abstract: Directly-coupled carbazole-pyridoindole moieties containing host materials for green and blue phosphorescent organic light-emitting diodes were synthesized by linking the two moieties via two different positions on the carbazole-pyridoindole core structure. The carbazole-pyridoindole moieties were functionalized using benzonitrile and phenyl substituent groups to introduce controlled-charge transport properties. The host materials synthesized using the carbazole-pyridoindole moieties showed a maximum quantum efficiency of 19.1% in green phosphorescent devices, and 18.2% in blue phosphorescent devices. Graphical abstract: Highlights: Directly linked carbazole-pyridoindole core structure for host material High triplet energy host materials with thermal stability Benzonitrile and phenyl modification to manage charge transport properties