ORGANIC LIGHT-EMITTING ELEMENT, LIGHT SOURCE DEVICE AND ORGANIC LIGHT-EMITTING ELEMENT MANUFACTURING METHOD

摘要

To increase organic light-emitting element efficiency, there is a need to reduce the effect of non-radiative electron-hole pair recombination other than surface plasmon polariton excitation, to convert the majority of exciton energy to visible light, and to dramatically improve the light-emitting efficiency of organic light-emitting elements. This organic light-emitting element comprises a reflecting electrode, a transparent electrode, and a light-emitting layer placed between the reflecting electrode and the transparent electrode, said organic light-emitting element having a configuration wherein the light-emitting layer contains a host and a first dopant, and the first dopant's average transition dipole moment has unequal vertical and horizontal components relative to the substrate surface.