Patent ID: 9685623
Date: 2017-06-20
CPC Classifications: H01L

Claim:
1. A light-emitting element comprising: a pair of electrodes; a first layer, a second layer and a third layer between the pair of electrodes; a hole-transporting layer between the third layer and one of the pair of electrodes; and an electron-transporting layer between the first layer and the other of the pair of electrodes, wherein: the first layer comprises a first organic compound and a second organic compound, the second layer comprises a third organic compound and a fourth organic compound, the third layer comprises the first organic compound and a fifth organic compound, the second layer is in direct contact with the first layer and the third layer, each of the first organic compound and the third organic compound has a light-emitting property, each of the fourth organic compound and the fifth organic compound has a hole-transporting property, the second organic compound has an electron-transporting property, and a peak wavelength of light emitted from the first organic compound is shorter than that from the third organic compound.