掺杂与非掺杂相结合制备有机发光器件

Fabrication of Multiple Organic Light-emitting Device Doping and Non-doping Method

摘要:

采用掺杂和非掺杂方法制备了一种多层白色有机电致发光器件。DPVBi为蓝光发光层，将红光［Ir（piq）₂（acac）］磷光掺杂染料掺入到母体BAlq中作为红光发光层，荧光材料QAD以亚单层的方式插入Alq₃中作为绿光发光层，通过改变亚单层的厚度，得到了高效率的有机发光器件，此器件的最大电流效率可达6.1 cd/A，最大功率效率达3.1 lm/W，最大亮度达25 300 cd/m²，当电压从4 V变化到14 V时，色坐标从（0.45,0.55）变化到（0.47,0.37），处于黄白光区。此器件的特点在于器件的性能可以通过简单地调整QAD 的厚度进行控制，避免了使用多掺杂层工艺的复杂性。

Abstract:

Organic light-emitting devices (OLED) were fabricated with based on doping and non-doping method. In which fluorescentc material DPVBi acts as blue emitter layer, Ir(piq)₂(acac) was doped into BAlq host to act as the red emitter layer, and sub-monolayer QAD was inserted in the electron transporting layer to act as green emitter layer, respectively. The device performance can be controlled by varying the thickness of QAD. The maximum EL efficiency, maximum power efficiency and maximum luminance of the device with the thickness of 0.05nm QAD are 6.1 cd/A, 3.1 lm/W and 25 300 cd/m², respectively. The simple structure and excellent reproducibility make them well suit to low-cost lighting applications and beneficial for the industrialization.