Patent ID: 9735368
Date: 2017-08-15
CPC Classifications: C09K,H01L,H05B

Claim:
1. An organic electroluminescent element that includes a light-emitting layer composed of a light-emitting composition containing at least one type of host material and at least one type of light-emitting material, wherein said host material is a fluorescent anthracene derivative, the light-emitting material fluoresces blue light under DC current with a current density of 25 mA/cm if λ (nm) is taken to be the shortest wavelength of all the wavelengths at which the intensity of photoluminescence (“PL”) emission of a film composed only of said host material is one-half the maximum emission intensity, then the intensity of PL emission at said wavelength λ of a film composed of said light-emitting composition is no more than 1/10 the maximum emission intensity of PL emission of the film composed of said light-emitting composition, and the PL emission of the film composed of said light-emitting composition satisfies CIE y≦0.08.