Organic light-emitting element, light source device and method of manufacturing organic light-emitting element

摘要

In order to achieve the increased efficiency of an organic light-emitting element, there is a need to reduce the influence of non-radiative recombination of electron-hole pairs except for surface plasmon polariton excitation, to convert most of exciton energy into visible light, and to tremendously improve the luminous efficiency of the organic light-emitting element. An organic light-emitting element according to the present invention includes a reflective electrode, a transparent electrode, and a light-emitting layer placed between the reflective electrode and the transparent electrode, and the organic light-emitting element is configured so that the light-emitting layer contains a host and a first dopant, and for the first dopant, one of the vertical component and horizontal component of the average value for transition dipole moments with respect to a substrate surface is larger than the other of the components.

主权项

1. An organic light-emitting element comprising:
a lower electrode and an upper electrode, one of the electrode serving as a reflective electrode, and the other thereof serving as a transparent electrode; and a light-emitting layer placed between the lower electrode and the upper electrode, the light-emitting layer containing a host and a first dopant, wherein the first dopant contains a first functional group, for the first dopant, one of a vertical component and a horizontal component of an average value for transition dipole moments with respect to a substrate surface is larger than the other of the components, and the concentration of the first dopant is higher in either one of: a region of the light-emitting layer with the upper electrode closer thereto; and a region thereof with the lower electrode closer thereto, than in the other of the regions.