White light-emitting organic electroluminescent panel and white light-emitting organic electroluminescent element

摘要

to provide a white light-emitting organic electroluminescent element highly efficient viewing angle dependence is reduced. Between the anode and the cathode is a white light-emitting organic electroluminescent device comprising a light-emitting dopant of at least four different emission peak wavelength. Emission peak wavelength is longer in the order of light emission dopant A, the light emitting dopant B, the light-emitting dopant C, and D are the light emitting dopant emitting dopant four above. (In the emission peak wavelength of the light-emitting dopant A) the average luminance / brightness front of 50-70 degrees emission spectrum, is (in the emission peak wavelength of the light-emitting dopant D) average luminance / brightness front of 50-70 degrees, (in the emission peak wavelength of the light-emitting dopant C) the average luminance / brightness front of 50-70 degrees it is (at the emission peak wavelength of the light-emitting dopant B) the average luminance / brightness front of 50-70 degrees.