Organic light-emitting diodes and organic light-emitting devices

Abstract

This description refers to a luminescent organic electrode containing a first electrode; the second electrode is facing the first electrode; and the first emitting material layer contains the first, second, and third compounds and is positioned between the first and second electrodes, where the initial wavelength of the second compound is greater than the initial wavelength of the first compound and smaller than the initial wavelength of the third compound, where the maximum emission wavelength of the second compound is smaller than the maximum emission wavelength of the first compound, and the maximum emission wavelength of the third compound is equal to or less than the maximum emission wavelength of the first compound, and in which the total width at the maximum of each of the second and third compounds is less than the total width at the maximum of the first compound. The invention also relates to an organic luminescent device.