| 초록 |
The extensively used hole-transporting host 4,4’,4’’-tris(N-carbazolyl)-triphenylamine (TCTA) as small molecule interlayer for green phosphorescent organic light emitting diodes (OLEDs) were fabricated by solution process. The OLEDs that we prepared utilizes phosphorescent dopant materials, tris(2-(4-toltyl)phenylpyridine) iridium (Ir(mppy)3), exhibit a Commission International de l’Eclairage (CIE) coordinates of (0.300, 0.620). We have fabricated solution processed green OLEDs with a configuration of ITO/PEDOT:PSS/TCTA/PVK:mCP:Ir(mppy)3/OXD-7/LiF/Al. The optimized interlayer OLEDs showed excellent performance such as maximum luminance efficiency of 40.8 cd/A, a maximum power efficiency of 21.4 lm/W and a maximum external quantum efficiency of 11.9 % and the driving voltage of 4.3 V. |
