ORGANIC ELECTROLUMINESCENT ELEMENT AND LIGHTING DEVICE

摘要

The problem addressed by the present invention is providing a white phosphorescent light-emitting organic electroluminescent element that has a plurality of phosphorescent light-emitting dopants with different light emission wavelengths, that displays white emitted light, is highly efficient with a long life, and has superior stability of drive voltage for chromaticity and drive voltage over time. Also addressed is the problem of providing a lighting devise. This organic electroluminescent element has a pair of electrodes on a base material and two light emitting layers containing host material and phosphorescent light-emitting dopants between those electrodes and emits white light when electrified. The organic electroluminescent element is characterized by the host material contained in the two light emitting layers being different. The organic electroluminescent element in further characterized by at least one of the phosphorescent light-emitting dopants of the phosphorescent light-emitting dopants contained in the two light emitting layers being a blue phosphorescent light-emitting dopant with an ionization potential (Ip) of 5.3 eV or less, and at least one layer of the two light emitting layers containing a plurality of phosphorescent light-emitting dopants.