Granted Patent B2

US 12,581,796 · App. 17/559,054 · Granted Mar 17, 2026

Inventors: Satoshi Seo (Kanagawa, JP); Tsunenori Suzuki (Kanagawa, JP); Nobuharu Ohsawa (Kanagawa, JP)

Assignee: Semiconductor Energy Laboratory Co., Ltd.

H10K50/171H10K50/131H10K50/16H10K50/17H10K59/80521H10K59/12

Abstract

Claims (84)

1 . A light-emitting device comprising:

a second electrode over a first electrode with an EL layer therebetween,

wherein the EL layer comprises a light-emitting layer, an electron-transport layer, and an electron-injection layer,

wherein the electron-transport layer is over the light-emitting layer,

wherein a side surface of an insulating layer is in contact with the light-emitting layer and the electron-transport layer,

wherein the electron-injection layer is over the electron-transport layer and the insulating layer, and

wherein the electron-injection layer is in contact with the electron-transport layer and the insulating layer.

2 . The light-emitting device according to claim 1 , wherein the electron-injection layer comprises a composite material in which an organic compound and an electron donor are mixed, or a composite material in which an organic compound and any of an alkali metal, an alkaline earth metal, a rare earth metal, and a metal that belongs to Group 5, Group 7, Group 9, Group 11, or Group 13 in the periodic table are mixed.

3 . A light-emitting apparatus comprising:

the light-emitting device according to claim 1 ; and

at least one of a transistor and a substrate.

4 . An electronic device comprising:

the light-emitting apparatus according to claim 3 ; and

at least one of a sensor, an operation button, a speaker, and a microphone.

5 . A lighting device comprising:

the light-emitting apparatus according to claim 3 ; and

a housing.

6 . A light-emitting device according to claim 1 , wherein the insulating layer comprises at least one of aluminum oxide, magnesium oxide, hafnium oxide, gallium oxide, indium gallium zinc oxide, silicon nitride, and silicon nitride oxide.

7 . A light-emitting device comprising:

a second electrode over a first electrode with an EL layer therebetween,

wherein the EL layer comprises a hole-injection layer, a light-emitting layer, an electron-transport layer, and an electron-injection layer,

wherein the hole-injection layer is over the first electrode,

wherein the light-emitting layer is over the hole-injection layer,

wherein the electron-transport layer is over the light-emitting layer,

wherein a side surface of an insulating layer is in contact with the hole-injection layer, the light-emitting layer, and the electron-transport layer,

wherein the electron-injection layer is over the electron-transport layer and the insulating layer, and

wherein the electron-injection layer is in contact with the electron-transport layer and the insulating layer.

8 . The light-emitting device according to claim 7 , wherein the electron-injection layer comprises a composite material in which an organic compound and an electron donor are mixed, or a composite material in which an organic compound and any of an alkali metal, an alkaline earth metal, a rare earth metal, and a metal that belongs to Group 5, Group 7, Group 9, Group 11, or Group 13 in the periodic table are mixed.

9 . A light-emitting apparatus comprising:

the light-emitting device according to claim 7 ; and

at least one of a transistor and a substrate.

10 . An electronic device comprising:

the light-emitting apparatus according to claim 9 ; and

at least one of a sensor, an operation button, a speaker, and a microphone.

11 . A lighting device comprising:

the light-emitting apparatus according to claim 9 ; and

a housing.

12 . A light-emitting device according to claim 7 , wherein the insulating layer comprises at least one of aluminum oxide, magnesium oxide, hafnium oxide, gallium oxide, indium gallium zinc oxide, silicon nitride, and silicon nitride oxide.

13 . A light-emitting apparatus comprising a first light-emitting device and a second light-emitting device adjacent to each other,

wherein the first light-emitting device comprises a second electrode over a first electrode with a first EL layer therebetween,

wherein the first EL layer comprises a first light-emitting layer, a first electron-transport layer, and an electron-injection layer,

wherein the first electron-transport layer is over the first light-emitting layer,

wherein a first insulating layer is in contact with side surfaces of the first light-emitting layer and the first electron-transport layer,

wherein the electron-injection layer is over the first electron-transport layer,

wherein the second light-emitting device comprises the second electrode over a third electrode with a second EL layer therebetween,

wherein the second EL layer comprises a second light-emitting layer, a second electron-transport layer, and the electron-injection layer,

wherein the second electron-transport layer is over the second light-emitting layer,

wherein a second insulating layer is in contact with side surfaces of the second light-emitting layer and the second electron-transport layer,

wherein the electron-injection layer is over the first electron-transport layer and the second electron-transport layer, and

wherein the electron-injection layer is in contact with the first electron-transport layer, the second electron-transport layer, the first insulating layer, and the second insulating layer.

14 . The light-emitting apparatus according to claim 13 , wherein the second electrode is positioned on the side surfaces of the first light-emitting layer and the second light-emitting layer with the electron-injection layer therebetween.

15 . The light-emitting apparatus according to claim 13 , wherein the second electrode is positioned on the side surfaces of the first electron-transport layer, the second electron-transport layer, the first light-emitting layer, and the second light-emitting layer with the electron-injection layer therebetween.

16 . The light-emitting apparatus according to claim 13 , wherein the electron-injection layer comprises a composite material in which an organic compound and an electron donor are mixed, or a composite material in which an organic compound and any of an alkali metal, an alkaline earth metal, a rare earth metal, and a metal that belongs to Group 5, Group 7, Group 9, Group 11, or Group 13 in the periodic table are mixed.

17 . An electronic device comprising:

the light-emitting apparatus according to claim 13 ; and

at least one of a sensor, an operation button, a speaker, and a microphone.

18 . A lighting device comprising:

the light-emitting apparatus according to claim 13 ; and

a housing.

19 . A light-emitting apparatus comprising a first light-emitting device and a second light-emitting device adjacent to each other,

wherein the first light-emitting device comprises a second electrode over a first electrode with a first EL layer therebetween,

wherein the first EL layer comprises a first hole-injection layer, a first light-emitting layer, a first electron-transport layer, and an electron-injection layer,

wherein the first hole-injection layer is over the first electrode,

wherein the first light-emitting layer is over the first hole-injection layer,

wherein the first electron-transport layer is over the first light-emitting layer,

wherein a first insulating layer is in contact with side surfaces of the first hole-injection layer, the first light-emitting layer, and the first electron-transport layer,

wherein the electron-injection layer is over the first electron-transport layer,

wherein the second light-emitting device comprises the second electrode over a third electrode with a second EL layer therebetween,

wherein the second EL layer comprises a second hole-injection layer, a second light-emitting layer, a second electron-transport layer, and the electron-injection layer,

wherein the second hole-injection layer is over the third electrode,

wherein the second light-emitting layer is over the second hole-injection layer,

wherein the second electron-transport layer is over the second light-emitting layer,

wherein a second insulating layer is in contact with side surfaces of the second hole-injection layer, the second light-emitting layer, and the second electron-transport layer,

wherein the electron-injection layer is over the first electron-transport layer and the second electron-transport layer, and

wherein the electron-injection layer is in contact with the first electron-transport layer, the second electron-transport layer, the first insulating layer, and the second insulating layer.

20 . The light-emitting apparatus according to claim 19 , wherein the second electrode is positioned on the side surfaces of the first light-emitting layer and the second light-emitting layer with the electron-injection layer therebetween.

21 . The light-emitting apparatus according to claim 19 , wherein the second electrode is positioned on the side surfaces of the first electron-transport layer, the second electron-transport layer, the first light-emitting layer, and the second light-emitting layer with the electron-injection layer therebetween.

22 . The light-emitting apparatus according to claim 19 , wherein the electron-injection layer comprises a composite material in which an organic compound and an electron donor are mixed, or a composite material in which an organic compound and any of an alkali metal, an alkaline earth metal, a rare earth metal, and a metal that belongs to Group 5, Group 7, Group 9, Group 11, or Group 13 in the periodic table are mixed.

23 . An electronic device comprising:

the light-emitting apparatus according to claim 19 ; and

at least one of a sensor, an operation button, a speaker, and a microphone.

24 . A lighting device comprising:

the light-emitting apparatus according to claim 19 ; and

a housing.

Assignments (1)

Priority Claims (2)

Continuity (1)

References Cited (88)