Synthesis and Electroluminescent Properties of Fully Substituted Ethylene Moieties

Abstract

We synthesized a new bluish-green emitting material using fully substituted ethylene moieties, 1,1,2,2-tetrakis(4′-tert-butyl-phenyl)ethene [TBPE] and 1,1,2,2-tetrakis(4′-tert-butyl-biphenyl)ethene [TBBPE] by McMurry reaction. These products were identified by NMR, IR, Fab-Mass analysis. The maximum absorbance of TBPE and TBBPE appeared at around 318 nm and 358 nm and two compounds also showed different PL maximum value as 431 nm (TBPE) and 511 nm (TBBPE). ITO/2-TNATA/TBBPE/Alq₃/LiF/Al device showed bluish-green EL color and 4cd/A efficiency.

Keywords:

• blue organic light-emitting diode
• electroluminescent
• McMurry reaction
• tetraphenylethylene

Acknowledgments

This work was supported by the Catholic University of Korea, Research Fund, 2006.