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.
本发明涉及一种发光元件,它至少包含一个发光层,发光层包含
发光材料和主材料,发光最大波长为 500 nm 或以下,其中主材料的最小激发三重能级高于
发光材料的最小激发三重能级。