Patent ID: 9614170
Date: 2017-04-04
CPC Classifications: H01L

Claim:
1. An organic electroluminescence device comprising a pair of electrodes and an organic compound layer interposed between the pair of electrodes, wherein the organic compound layer comprises a plurality of emitting layers at least comprising a first emitting layer and a second emitting layer, the first emitting layer comprises a first host material and a fluorescent first luminescent material, the second emitting layer comprises a second luminescent material that is different from the first luminescent material, a difference ΔST(H1) between singlet energy EgS(H1) of the first host material and an energy gap Eg the first luminescent material has a main peak wavelength from 400 nm to less than 500 nm and the second luminescent material has a main peak wavelength from 500 nm to 700 nm, or alternatively, the first luminescent material has a main peak wavelength from 500 nm to 700 nm and the second luminescent material has a main peak wavelength from 400 nm to less than 500 nm.