Benzo[d]imidazole-functionalized triazatruxenes as the emitting materials for solution-processed non-doped OLEDs

Document Type

Article

Publication Date

4-1-2021

Abstract

Two benzo[d]imidazole/triazatruxene hybrid compounds, 5,10,15-tributyl-2,7,12-tris(4-(1-phenyl-1H-benzo[d]imidazole-2-yl)phenyl)-10,15-dihydro-5H-diindolo[3,2-a:3′,2′-c]carbazole (2,7,12-TBI-TAT) and 5,10,15-tributyl-3,8,13-tris(4-(1-phenyl-1H-benzo[d]imidazole-2-yl)phenyl)-10,15-dihydro-5H-diindolo[3,2-a:3′,2′-c]carbazole (3,8,13-TBI-TAT), were synthesized by the introduction of three benzo[d]imidazole (BI) moieties at 2-, 7-, 12-positions and 3-, 8-, 13-positions of the alkylated triazatruxene (TAT) core, respectively. Their thermal stabilities, photophysical and electrochemical properties were systematically investigated. These hybrid compounds exhibited good solubility as well as excellent thermal stability. Besides, the solution-processed doped and non-doped OLEDs based on the compounds were fabricated, in which the non-doped device fabricated from 2,7,12-TBI-TAT exhibited the best electroluminescence performance with a maximum brightness of 10075 cd/m2, a maximum current efficiency of 5.35 cd/A and a maximum external quantum efficiency (EQE) of 2.25%.

Identifier

85099987383 (Scopus)

Publication Title

Dyes and Pigments

External Full Text Location

https://doi.org/10.1016/j.dyepig.2021.109165

e-ISSN

18733743

ISSN

01437208

Volume

188

Grant

51563014

Fund Ref

National Natural Science Foundation of China

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