Influence of the Thickness of Multi-Emissive Layers Compared with the Performance of Organic Electroluminescence Devices

The luminous layers are stacked up for many times to produce the organic electroluminescence devices.The devices show different luminous characters on the condition that the totally thickness of the luminous layers is same and proportion of each luminous layer is different.The electroluminescence spectrum of the devices is changed distinctly,and the light changes from blue to white approximately.Meanwhile,the brightness and the efficiency of the devices changes respectively.