蓝色发光层厚度对有机电致发光器件性能的影响

Effect of the Thickness of Blue Emitting Layer on Organic Light-emitting Devices

制备了结构为ITO/NPB(40 nm)/DPVBi(d)/CBP:Ir(piq)3(15 nm,6%)/Bphen(40 nm)/Mg:Ag(200 nm)的有机电致发光器件。通过改变DPVBi蓝光层的厚度,研究了厚度对器件电致发光性能的影响。结果表明,蓝色荧光层厚度为5 nm时,器件性能较大;继续增大蓝光层厚度,器件性能降低。

Organic light-emitting devices with a structure of ITO/NPB （40 nm）/ DPVBi （d）/CBP： Ir（piq）3 （15 nm, 6%）/ Bphen （40 nm）/ Mg：Ag （200 nm） were fabricated. Effect of the thickness variation of the DPVBi on the device performance was studied. The results revealed that a device with 5-nm DPVBi showed higher performance than that of the device with thicker DPVBi.