한국전기전자재료학회:학술대회논문집 (Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference)
- 한국전기전자재료학회 2003년도 추계학술대회 논문집 Vol.16
- /
- Pages.514-516
- /
- 2003
Blue organic light emitting diodes with carbazole based small molecules and color tunning by controlled side group
- Kim, Y.B. (Wooyoung Inst. of Tech.) ;
- Ahn, Y.J. (Wooyoung Inst. of Tech.) ;
- Park, J.H. (Wooyoung Inst. of Tech.) ;
- Khang, M.W. (Wooyoung Inst. of Tech.) ;
- Woo, H.S. (Wooyoung Inst. of Tech.) ;
- Park, J.W. (Catholic University)
- 발행 : 2003.11.13
초록
We have fabricated an air stable blue emitting organic electroluminescent devices (OLEDs) with a carbazole based emitting molecule, Bis(3-N-ethylcarbazolyl)terephthalidene (BECP). Our device emits strong blue at 472 nm with the luminance efficiency of near 1 lm/W at a voltage and current density of 8 V and 5.7 mA/cm2, respectively, reaching the brightness up to 5000 cd/m2 at 270 mA/cm2. Finally, in order to tune the emission color from blue to green, we have used Bis(3-N-ethylcarbazolyl)cynoterephthalidene (BECCP), a derivative of BECP by adding cyno group in side chain, and compared the electroluminscence (EL) of OLEDS prepared by BECCP to that of BECP based OLEDs.