Carbazole-linked porphyrin dimers for organic light emitting diodes: synthesis and initial photophysical studies
摘要:
Carbazole linked porphyrin dimers were synthesized in good yields via stepwise Suzuki coupling reactions using bromoporphyrins and borylated carbazoles as the precursors, the latter of which were synthesized via known procedures from biphenyl derivatives. For comparative purposes porphyrin-carbazole monomers were synthesized. Single layer organic light emitting diodes (OLEDs) were created to demonstrate the optical properties of these materials. Light emission from these carbazole substituted porphyrins showed better results compared to previously examined bromo substituted porphyrins with better electroluminescence and lower turn-on voltages. Dimers exhibited turn-on voltages of 3 V compared to 6 V for monomeric porphyrin-carbazoles. (C) 2011 Elsevier Ltd. All rights reserved.
Practical Syntheses of<i>N</i>-Hexylcarbazol-2-yl- and -3-yl-boronic Acids, Their Cross-Coupled Products and a Derived Tris-cyclometalated (Pyridin-2-yl)carbazole Iridium(III) Complex
作者:Martin R. Bryce、Mustafa Tavasli、Sylvia Bettington、Andrei S. Batsanov、Andrew P. Monkman
DOI:10.1055/s-2005-865307
日期:——
The syntheses of N-hexylcarbazol-2-yl- and -3-yl-boron- ic acids (1 and 2) are described on a ca. 7 g scale, starting from com- mercially available 2,5-dibromonitrobenzene (4) and carbazole (11), respectively. Compounds 1 and 2 underwent efficient palladi- um-catalyzed cross-coupling reactions under Suzuki-Miyaura con- ditions to yield products 17, 18 and 20. Compound 18 reacted with IrCl3 to give
ORGANIC ELECTROLUMINESCENCE DEVICE AND POLYCYCLIC COMPOUND FOR ORGANIC ELECTROLUMINESCENCE DEVICE
申请人:Samsung Display Co., LTD.
公开号:US20210066620A1
公开(公告)日:2021-03-04
An organic electroluminescence device comprises a first electrode, a second electrode disposed on the first electrode, and an emission layer disposed between the first electrode and the second electrode. The emission layer comprises a polycyclic compound represented by Formula 1 and achieves high efficiency and a low driving voltage. In Formula 1, at least one of Ar
1
to Ar
4
is represented by Formula 2.