US 12,727,319 B2 · Light-emitting device, light-emitting apparatus, electronic appliance, and lighting device

Abstract

A light-emitting device with high heat resistance in a manufacturing process is to be provided. The light-emitting device includes a second electrode over a first electrode with an EL layer sandwiched therebetween; the EL layer includes at least a light-emitting layer, a first electron-transport layer, and a second electron-transport layer; the first electron-transport layer is over the light-emitting layer; the light-emitting device includes an insulating layer in contact with a side surface of the light-emitting layer and a side surface of the first electron-transport layer; the second electron-transport layer is over the first electron-transport layer; the insulating layer is positioned between the second electron-transport layer and the side surface of the light-emitting layer and the side surface of the first electron-transport layer; and the first electron-transport layer contains a heteroaromatic compound including at least one heteroaromatic ring and an organic compound different from the heteroaromatic compound.

Claims18

Dependent claims

A light-emitting device comprising:

a first electrode;
an EL layer over the first electrode;
an insulating layer in contact with at least a part of the EL layer;
and
a second electrode over the EL layer and the insulating layer,
wherein the EL layer comprises at least a light-emitting layer, a first electron-transport layer over the light-emitting layer, and a second electron-transport layer over the first electron-transport layer,
wherein the insulating layer is in contact with an end portion of the light-emitting layer and an end portion of the first electron-transport layer,
wherein the second electron-transport layer covers the first electron-transport layer and the insulating layer, and
wherein the first electron-transport layer comprises a first heteroaromatic compound comprising at least one heteroaromatic ring and a first organic compound different from the first heteroaromatic compound.

6 more elements

A light-emitting apparatus comprising:

a first light-emitting device and a second light-emitting device that are adjacent to each other,
wherein the first light-emitting device comprises a second electrode over a first electrode with a first EL layer sandwiched therebetween, and a first insulating layer adjacent to a part of the first EL layer,
wherein the first EL layer comprises at least a first light-emitting layer, a first electron-transport layer over the first light-emitting layer, and a second electron-transport layer over the first electron-transport layer,
wherein the first insulating layer is in contact with an end portion of the first light-emitting layer and an end portion of the first electron-transport layer,
wherein the second electron-transport layer covers the first electron-transport layer and the first insulating layer,
wherein the second light-emitting device comprises the second electrode over a third electrode with a second EL layer sandwiched therebetween, and a second insulating layer adjacent to a part of the second EL layer,
wherein the second EL layer comprises at least a second light-emitting layer, a third electron-transport layer over the second light-emitting layer, and the second electron-transport layer over the third electron-transport layer,
wherein the second insulating layer is in contact with an end portion of the second light-emitting layer and an end portion of the third electron-transport layer,
wherein the second electron-transport layer covers of the third electron-transport layer and the second insulating layer,
wherein the first electron-transport layer comprises a first heteroaromatic compound comprising at least one heteroaromatic ring and a first organic compound different from the first heteroaromatic compound, and
wherein the third electron-transport layer comprises a second heteroaromatic compound comprising at least one hetero aromatic ring and a second organic compound different from the second heteroaromatic compound.

8 more elements

Dependencies are inferred from the claim text.

Light-emitting device, light-emitting apparatus, electronic appliance, and lighting device

Life of this patent

Light-emitting device, light-emitting apparatus, electronic appliance, and lighting device

Life of this patent

Abstract

Claims18