For host materials, a high triplet energy (ET) value and good charge transporting ability with appropriate frontier orbital energy are vital properties to achieve efficient phosphorescent organic light emitting diodes (PhOLEDs). A novel host material, 3,3′,6,6′-tetra-tert-butyl-9,9′-bicarbazole (tcaz–tcaz), was designed and synthesized by an intermolecular N–N coupling reaction of 9,9′-bicarbazoles
对于主体材料,高三重态能量(E T)值和良好的电荷传输能力以及适当的前沿轨道能量是获得高效
磷光有机发光二极管(PhOLED)的关键特性。一种新颖的基质材料,3,3',6,6'-四-叔丁基-9,9'-二咔(tcaz - tcaz),设计并通过9,9-分子间N-N偶联反应合成' -联
咔唑。该化合物显示出优异的热稳定性和形态稳定性,其纯膜的分解温度(T d)为302°C,而均方根粗糙度(RMS)的小值小于0.670 nm。另外,tcaz – tcaz具有3.0 eV的高E T值和-5.71 eV / -2.08 eV的合适HOMO / LUMO。Tcaz – tcaz托管的设备分别具有最大的外部量子,功率和电流效率,分别为15.5%,40.0 lm W -1和56.1 cd A -1,对于Ir(ppy)3和11.0具有2.4 V的低开启电压%,对于PO-01,为35.6 lm W -1和35.9