Construction and performance of OLED devices prepared from liquid-crystalline TADF materials. Issue 36 (8th September 2022)

• Record Type: Journal Article
• Authors: Suleymanova, Alfiya F.; Shafikov, Marsel Z.; Chen, Xinrui; Wang, Yafei; Czerwieniec, Rafal; Bruce, Duncan W.
• Is Part Of: Physical chemistry chemical physics. Volume 24:Issue 36(2022)
• Page Start: 22115
• Page End: 22121
• Publication Date: 2022-09-08
• Subjects: Chemistry, Physical and theoretical -- Periodicals; 541.3
• DOI: 10.1039/d2cp02684h
• Languages: English
• ISSNs: 1463-9076

Abstract

Abstract : Emissive liquid-crystalline phthalonitrile carbazole conjugates showing low roll-off in OLED devices. Abstract : The device performance is reported for three compounds which show both thermally activated delayed fluorescence and liquid crystallinity, and use the donor 3, 6-bis(3, 4-didodecyloxyphenyl)carbazole. Two of the compounds, whose photophysics were reported previously, are based on a terephthalonitrile acceptor. A third and new compound is based on an isophthalonitrile acceptor and shows a more temperature-accessible mesophase and enhanced solution emission quantum yield. Two of the compounds show device external quantum efficiencies of between 2–3% and exhibit very small efficiency roll off. The responses are evaluated in terms of the specific nature of the materials.