A solution-processable bipolar material tBu-OXDTFA comprising an electron-rich triphenylamine core and electron-deficient oxadiazole/fluorene peripheries was synthesized. This dendrimer-like molecule not only possesses a high triplet energy (2.74 eV) but also exhibits excellent film-forming properties upon solution processing. We achieved highly efficient white electrophosphorescent OLEDs (22.3 cd A−1, 11.6%) through solution processing, wherein the single white emitting layer was readily formed after spin-coating a solution of blue- and red-phosphor co-dopants containing tBu-OXDTFA as the host matrix.
合成了一种可溶液加工的双极性材料 tBu-OXDTFA,其包含富电子
三苯胺核心和缺电子恶二唑/
芴外围。这种树枝状分子不仅具有高三线态能量(2.74 eV),而且在溶液加工时表现出优异的成膜性能。我们通过溶液处理实现了高效的白色电致
磷光OLED(22.3 cd A−1,11.6%),其中在旋涂含有tBu-OXDTFA的蓝色和红色
磷光体共掺杂剂溶液后很容易形成单个白色发光层作为主矩阵。