Abstract
We synthesized new bluish-green and sky-blue emitting materials, 1,1,2,2-tetrakis(4′-tert-butylbiphenyl)ethane[TBBPE] and 1,1,2,2-tetrakis(4-(anthracen-9-yl)phenyl)ethene[TAPE]. TBBPE and TAPE film showed PL maximum value of 511 nm and 492 nm. TBBPE OLED device showed bluish-green C.I.E. value of (0.236, 0.412) and high luminance efficiency of 5.02 cd/A at 10 mA/cm2. TAPE device also showed sky-blue C.I.E. value of (0.213, 0.323) and 3.17 cd/A at 10 mA/cm2. It is found that TBBPE shows better luminance efficiency than TAPE and TAPE device exhibits relatively lower operating voltage and better C.I.E. value than TBBPE device.
Acknowledgments
This work was supported by grant No. R01-2006-00010196-0 from the Basic Research Program of the Korea Science & Engineering Foundation.