Electrochemical and Electroluminescent Properties of Fully Substituted Ethylene Moieties

Abstract

We synthesized new blue and bluish green emitting materials using fully substituted ethylene moieties, 1,1,2,2-tetrakis(4-tert-butylphenyl)ethene[TBPE], 1,2-di(4′-tert-butylphenyl)-1,2-bis(4′-tert-butylbiphenyl) ethene [BPBBPE] and 1,1,2,2-tetrakis(4′-tert-butylbiphenyl)ethene[TBBPE] by McMurry reaction. EL maximum values of devices are 478 nm and 492 nm in ITO/2-TNATA(60 nm)/NPB(15 nm)/BPBBPE or TBBPE(30 nm)/Alq₃(30 nm)/LiF(1 nm)/Al(200 nm) device. TBBPE device showed bluish-green CIE value of (0.236, 0.412) and 5.02cd/A at 10 mA/cm². BPBBPE device also showed sky-blue CIE value of (0.218, 0.355) and 2.31cd/A at 10 mA/cm².

Keywords:

• blue emitting materials
• electroluminescent
• fully substituted ethylene
• McMurry reaction

Acknowledgments

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