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

An organic light-emitting element comprising:

• a reflective electrode;
• a transparent electrode;
• and
• a light-emitting layer placed between the reflective electrode and the transparent electrode,
• wherein the light-emitting layer contains a host and a first dopant,
• for the first dopant, a vertical component of an average value for transition dipole moments with respect to the substrate surface is larger than a horizontal component thereof, and
• the reflective electrode has a concave-convex structure on a side closer to the light-emitting layer.

An organic light-emitting element comprising:

• an upper electrode;
• a lower electrode;
• and
• a light-emitting layer placed between the upper electrode and the lower electrode,
• wherein the light-emitting layer contains a host and a first dopant,
• the first dopant contains a first functional group, 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, and
• for the first dopant, a horizontal component of an average value for transition dipole moments with respect to a substrate surface is larger than a vertical component thereof.

A method of manufacturing an organic light-emitting element comprising a reflective electrode, a transparent electrode, and a light-emitting layer placed between the reflective electrode and the transparent electrode,

• wherein the light-emitting layer contains a host and a first dopant,
• for the first dopant, a vertical component of an average value for transition dipole moments with respect to a substrate surface is larger than a horizontal component thereof,
• the light-emitting layer is prepared by coating, and
• a concave-convex structure is formed on a side of the reflective electrode closer to the light-emitting layer.

A light source device comprising a first organic light-emitting element and a second organic light-emitting element,

• wherein the first organic light-emitting element and the second organic light-emitting element each comprises a reflective electrode, a transparent electrode, and a light-emitting layer placed between the reflective electrode and the transparent electrode,
• the light-emitting layer of the first organic light-emitting element contains a first host and a first dopant,
• the light-emitting layer of the second organic light-emitting element contains a second host, a second dopant, and a third dopant.
• for the first dopant, the second dopant, and the third dopant, vertical components of average values for transition dipole moments with respect to a substrate surface is larger than horizontal components thereof, and
• the light source device comprises a concave-convex structure on a side of the reflective electrode closer to the light-emitting layer.

A method of manufacturing an organic light-emitting element comprising an upper electrode, a lower electrode, and a light-emitting layer placed between the upper electrode and the lower electrode,

• wherein the light-emitting layer contains a host and a first dopant,
• the first dopant contains a first functional group,
• 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,
• for the first dopant, a horizontal component of an average value for transition dipole moments with respect to a substrate surface is larger than a vertical component thereof, and
• the light-emitting layer is prepared by coating.

A light source device comprising a first organic light-emitting element and a second organic light-emitting element,

• wherein the first organic light-emitting element and the second organic light-emitting element each comprises an upper electrode, a lower electrode, and a light-emitting layer placed between the upper electrode and the lower electrode,
• the light-emitting layer of the first organic light-emitting element contains a host and a first dopant,
• the light-emitting layer of the second organic light-emitting element contains a host, a second dopant, and a third dopant
• the first dopant contains a first functional group,
• the second dopant contains a second functional group,
• the third dopant contains a third functional group,
• the concentrations of the first dopant, second dopant, and third dopant are 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, and
• for the first dopant, the second dopant, and the third dopant, horizontal components of average values for transition dipole moments with respect to a substrate surface is larger than vertical components thereof.