通过主体之间的Suzuki偶联反应轻松合成了新型的主体材料DBFSF(DBFSF2和DBFSF4)。 二苯并呋喃 和 螺二芴。对它们的热,电化学,电子吸收和光致发光特性进行了充分研究。由于引入了庞大的螺二芴基,DBFSF2和DBFSF4的高玻璃化转变温度(T g)分别为115°C和124°C。不出所料,具有扭曲键的DBFSF4的三重态能量比DBFSF2高,可用于蓝色和绿色磷光OLED。制作了以DBFSF2和DBFSF4为主体的电致磷光器件。除了蓝色的22.2 cd A -1的良好电流效率和绿色的64.4 cd A -1的良好电流效率外,这两种器件均实现了低效率滚降。
An organic electroluminescence multicolor light-emitting apparatus including:
a substrate; and a first light-emitting device and a second light-emitting device being arranged in parallel relative to the surface of the substrate; wherein the first light-emitting device includes, between an anode and a cathode, a first organic layer, a second organic layer and a third organic layer in this sequence from the anode side in a direction perpendicular to the surface of the substrate,
the second light-emitting device includes, between an anode and a cathode, a second organic layer and a third organic layer in this sequence from the anode side in a direction perpendicular to the surface of the substrate, the first organic layer includes a first emitting dopant, the third organic layer includes a second emitting dopant, and the second organic layers independently comprise any one of compounds represented by the following formulas (1) to (6).