Chemistry - A European Journal p. 16044 - 16050 (2017)
Update date:2022-08-04
Topics: Functionalization Selective functionalization Dibenzofuran Host Materials Phosphorescent Organic Light-Emitting Diodes
Yu, Ji Gwang
Byeon, Sung Yong
Han, Si Hyun
Lee, Jun Yeob
Four dibenzofuran-type host materials substituted with a carbazolylcarbazole moiety were synthesized to investigate the effect of substitution position on the material parameters and device performances of host materials. The carbazolylcarbazole moiety was substituted at the 1-, 2-, 3-, and 4-positions of dibenzofuran by F or Br for a comprehensive study of the positional effect of dibenzofuran-derived host materials. Systematic synthesis and comparison of the four host materials revealed that 1-, 2-, and 4-position modification was better than 3-position modification for high triplet energy and high external quantum efficiency.
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