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采用聚合物掺杂的方式,利用旋涂工艺制备了ITO/PVK:TOPPt/BCP(20 nm)/Mg:Ag(200 nm)结构的有机电致发光器件(OLED)。对掺杂浓度为2%(器件A)和4%(器件B)的磷光聚合物掺杂体系的光致发光(PL)和电致发光(EL)性质进行了分析研究,并对主体材料PVK到磷光客体材料TOPPPt的能量传递机制进行了讨论。实验表明,器件的EL谱谱峰位于625 nm,器件A在25 V时最大亮度为3037 cd/m2,最大电流效率为3.15cd/A。器件的EL谱不会随着偏置电压和掺杂浓度而改变,器件具有较好的稳定性。
In the way of polymer doping, ITO / PVK: TOPPt / BCP (20 nm) / Mg: Ag (200 nm) structure organic electroluminescent device (OLED) was prepared by spin- The photoluminescence (PL) and electroluminescence (EL) properties of the phosphorescent polymer doping system with doping concentration of 2% (device A) and 4% (device B) were studied. The effects of PVK The energy transfer mechanism of phosphorescent guest material TOPPPt is discussed. The experimental results show that the EL peak of the device is located at 625 nm. The maximum brightness of device A at 25 V is 3037 cd / m2 and the maximum current efficiency is 3.15 cd / A. The device’s EL spectrum will not change with the bias voltage and doping concentration, the device has better stability.