介绍了结构为ITO/2T(20 nm)/NPBX(15 nm)/DPVBi(15 nm)/Alq3∶Rubrene(10,x) nm/Alq3(40 nm)/LiF(0.5 nm)/Al的掺杂方法制备的白光器件。其中掺杂浓度x分别为1%、2%、3%、4%和5%(质量分数)。这种结构充分利用了Rubrene在有机电致发光器件中的良好的掺杂特性，从而使器件发射出性能较好的白光。首先讨论了Rubrene的掺杂浓度对器件性能的影响。当Rubrene掺杂浓度是3%(质量分数)时，色度最好(0.32，0.32)且色坐标稳定。在此基础上，讨论了掺杂层厚度对器件性能的影响。掺杂层的厚度Y分别为10，15，20，25，30 nm变化时，制作了5个器件。随着掺杂层厚度的增加，器件发出的蓝光和黄光相对平衡，色度较好。其中掺杂层厚度为20 nm时，器件的效率和亮度均最高，分别达到5.10 cd/A 和17 130 cd/m2。

White organic light-emitting diodes with the structure of ITO/2T-NATA (20 nm)/NPBX(15 nm)/DPVBi(15 nm)/Alq3∶rubrene(10,x)nm/Alq3(40 nm)/LiF(0.5 nm)/Al were demonstrated. The doping concentrations were 1%, 2%, 3%, 4% and 5%(mass fraction), respectively. In this structure, because the doping character of rubrene was full used, the characters of WOLEDs were better. The effect of the doping concentration on the EL color was firstly discussed, it was found that 3% doping offers the Commission International de LEclairage coordinates (0.32, 0.32) and high color stability. On this condition, the thickness of doping layer(Y) was studied, the thickness is 10, 15, 20, 25, 30 nm, respectively. With the increasing of the thickness, the yellow and blue emissions balanced for forming white EL color. When the thickness was 20 nm, the efficiency and brightness were optima, they are 5.10 cd/A and 17 130 cd/m2, respectively.