Anthracene effects on organic light emitting diode performance of tetra-substituted ethylene derivatives

초록

We synthesized new bluish-green and sky-blue emitting materials, 1,1,2,2-tetra-kis(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/cm(2). TAPE device also showed sky-blue C. I. E. value of (0.213, 0.323) and 3.17 cd/A at 10 mA/cm(2). 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.

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