Park Jung Hyun, Seo Ji Hoon, Seo Ji Hyun, Lee Seok Jae, Koo Ja Ryong, Yoon Seung Soo, Lee Seung Hee, Kim Young Kwan
Department of Information Display, Hongik University, Seoul, 121-791, Korea.
J Nanosci Nanotechnol. 2008 Sep;8(9):4607-10. doi: 10.1166/jnn.2008.ic29.
High-efficiency white organic light-emitting diodes (WOLEDs) were fabricated with two emissive layers and an exciton blocking layer (EBL) was sandwiched between two phosphorescent dyes, bis(3,5-difluoro-2-(2-pyridyl)phenyl-(2-carboxypyridyl) iridium III (Flrpic) as the blue emission and iridium(III) bis(5-acetyl-2-phenylpyridinato-N,C2') acetylacetonate ((acppy)2Ir(acac)) as the red emission. This EBL effectively prevented a triple-triple energy transfer between the two phosphorescent emissive layers with blue and red emission. The white device showed Commission Internationale De L'Eclairage (CIE(x, y)) coordinates of (0.33, 0.42) at 22400 cd/m2, a maximum luminance of 27300 cd/m2 at 13.2 V, and a maximum luminous efficiency of 26.9 cd/A.
采用两个发光层制备了高效白色有机发光二极管（WOLED），并在两种磷光染料之间夹有一个激子阻挡层（EBL），其中双（3,5 - 二氟 - 2 - （2 - 吡啶基）苯基 - （2 - 羧基吡啶基）铱III（Flrpic）作为蓝色发射体，双（5 - 乙酰基 - 2 - 苯基吡啶基 - N，C2'）乙酰丙酮铱（（acppy）2Ir（acac））作为红色发射体。该EBL有效地阻止了蓝色和红色发射的两个磷光发光层之间的三重 - 三重能量转移。该白色器件在22400 cd/m2时的国际照明委员会（CIE（x，y））坐标为（0.33，0.42），在13.2 V时的最大亮度为27300 cd/m2，最大发光效率为26.9 cd/A。
