Highly efficient soluble materials for blue phosphorescent organic light–emitting diode
作者:Nam-Jin Lee、Dae-Hee Lee、Dong-Won Kim、Ji-Hoon Lee、Sang Hee Cho、Woo Sik Jeon、Jang Hyuk Kwon、Min Chul Suh
DOI:10.1016/j.dyepig.2012.04.011
日期:2012.11
A series of new carbazole derivatives with good solubility and electronic properties for use as host materials for blue phosphorescent organic light-emitting diodes is reported. A twisted biphenyl moiety at the center of the host materials was applied to enhance the solubility as well as triplet energies. Hence all the molecules showed good solubility as well as a fairly large triplet energy up to
报道了一系列具有良好溶解性和电子性能的新咔唑衍生物,用作蓝色磷光有机发光二极管的主体材料。施加位于主体材料中心的扭曲的联苯部分,以提高溶解度以及三重态能量。因此,所有分子均显示出良好的溶解性以及高达3.01 eV的相当大的三重态能量。使用双(4,6-二氟苯基吡啶并-N,C2)吡啶啉铱(III)作为客体和三种新的扭曲咔唑衍生物与电子型主体材料共主体的蓝色磷光器件显示出高达20.7 cd / A的高效率最大电流效率和外部量子效率的12.5%。与针对1,3-二(9H-咔唑-9-基)苯的测量值相比,该性能提高了约27.6%。