Light emitting element and azole compound

摘要

The present invention relates to a light emitting element comprising at least a light emitting layer containing a light emitting material and a host material and having a light emission maximum wavelength of 500 nm or less wherein the minimum excitation triplet energy level of the host material is higher than the minimum excitation triplet energy level of the light emitting material. Preferably, a light emitting element in which the minimum excitation triplet energy level of the host material is from 1.05 times to 1.38 times the minimum excitation triplet energy level of the light emitting material, and a light emitting element in which the minimum excitation triplet energy level of the host material is from 68 kcal/mol to 90 kcal/mol are provided.