公开(公告)号：US20230309385A1

公开(公告)日：2023-09-28

申请号：US17923834

申请日：2021-05-06

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Kyoko TAKEDA ,  Kunihiko SUZUKI ,  Harue OSAKA ,  Satoshi SEO ,  Tsunenori SUZUKI ,  Takuya ISHIMOTO ,  Naoaki HASHIMOTO

IPC: H10K85/60 ,  C07D493/14 ,  C09K11/06

CPC classification number: H10K85/636 ,  C07D493/14 ,  C09K11/06 ,  C09K2211/1018 ,  H10K59/12 ,  H10K85/6572 ,  H10K85/6574

Abstract: A novel organic compound is provided. Alternatively, an organic compound that emits light with favorable chromaticity is provided. Alternatively, an organic compound that emits blue light with favorable chromaticity is provided. Alternatively, a light-emitting element with favorable emission efficiency is provided. Alternatively, an organic compound with an excellent carrier-transport property is provided. The organic compound includes any of a substituted or unsubstituted dibenzofurobisbenzofuran skeleton, a substituted or unsubstituted dibenzothienobisbenzothiophene skeleton, a substituted or unsubstituted benzobisbenzothienobenzofuran skeleton, and a substituted or unsubstituted dibenzothienobisbenzofuran skeleton and one or two amino groups. In the organic compound, the amino group includes a substituted or unsubstituted heteroaryl group and any of a substituted or unsubstituted aromatic hydrocarbon group having 6 to 25 carbon atoms and a substituted or unsubstituted heteroaryl group having 5 to 25 carbon atoms.

公开(公告)号：US20230096419A1

公开(公告)日：2023-03-30

申请号：US17957181

申请日：2022-09-30

Applicant: Semiconductor Energy Laboratory Co., Ltd.

Inventor： Yusuke NONAKA ,  Satoshi SEO ,  Harue OSAKA ,  Tsunenori SUZUKI ,  Takeyoshi WATABE

IPC: H01L51/50 ,  H01L51/52

Abstract: To increase emission efficiency of a fluorescent light-emitting element by efficiently utilizing a triplet exciton generated in a light-emitting layer. The light-emitting layer of the light-emitting element includes at least a host material and a guest material. The triplet exciton generated from the host material in the light-emitting layer is changed to a singlet exciton by triplet-triplet annihilation (TTA). The guest material (fluorescent dopant) is made to emit light by energy transfer from the singlet exciton. Thus, the emission efficiency of the light-emitting element is improved.

公开(公告)号：US20230089346A1

公开(公告)日：2023-03-23

申请号：US17865921

申请日：2022-07-15

Applicant: Semiconductor Energy Laboratory Co., Ltd.

Inventor： Sachiko KAWAKAMI ,  Yui YOSHIYASU ,  Nobuharu OHSAWA ,  Tsunenori SUZUKI ,  Toshiki SASAKI ,  Naoaki HASHIMOTO ,  Tomohiro KUBOTA ,  Satoshi SEO

IPC: H01L51/00

Abstract: A light-emitting device with high heat resistance is provided. The light-emitting layer device includes an anode, a cathode; and an EL layer between the anode and the cathode. The EL layer includes a light-emitting layer and a first layer. The first layer is between the light-emitting layer and the cathode. The light-emitting layer is in contact with the first layer. The light-emitting layer includes a first organic compound and a light-emitting substance. The first layer includes a second organic compound. The light-emitting substance is a substance that emits blue light. The first organic compound is an organic compound including a fused aromatic hydrocarbon ring. The second organic compound is an organic compound including a heteroaromatic ring skeleton including one selected from a pyridine ring, a diazine ring, and a triazine ring; and a bicarbazole skeleton.

公开(公告)号：US20230076945A1

公开(公告)日：2023-03-09

申请号：US17863025

申请日：2022-07-12

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Sachiko KAWAKAMI ,  Yui YOSHIYASU ,  Nobuharu OHSAWA ,  Tsunenori SUZUKI ,  Toshiki SASAKI ,  Naoaki HASHIMOTO ,  Tomohiro KUBOTA ,  Satoshi SEO

IPC: H01L51/00

Abstract: A light-emitting device having favorable heat resistance is provided. The light-emitting device includes an anode, a cathode, and an EL layer positioned between the first anode and the cathode. The EL layer includes a light-emitting layer and a first layer. The first layer is positioned between the light-emitting layer and the cathode. The light-emitting layer and the first layer are in contact with each other. The light-emitting layer contains a first organic compound, a second organic compound, and a light-emitting substance. The first layer contains a third organic compound. The first organic compound and the third organic compound each have an electron-transport property. The second organic compound has a hole-transport property. The light-emitting substance emits red light. The first organic compound is represented by General Formula (G100). The third organic compound is represented by General Formula (G300).

公开(公告)号：US20220231238A1

公开(公告)日：2022-07-21

申请号：US17605329

申请日：2020-04-13

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Takumu OKUYAMA ,  Hiromi SEO ,  Naoaki HASHIMOTO ,  Yusuke TAKITA ,  Tsunenori SUZUKI ,  Satoshi SEO

IPC: H01L51/00

Abstract: A novel light-emitting device is provided. A light-emitting device with high emission efficiency is provided. A light-emitting device with a favorable lifetime is provided. A light-emitting device with low driving voltage is provided. The light-emitting device includes an anode, a cathode, and an EL layer positioned between the anode and the cathode. The EL layer includes a hole-injection layer, a light-emitting layer, and an electron-transport layer. The hole-injection layer contains a hole-transport material and an electron-accepting material. The electron-transport layer contains an electron-transport material and an alkali metal itself, an alkaline earth metal itself, a compound of an alkali metal or an alkaline earth metal, or a complex thereof. The hole-injection layer has the spin density measured by an ESR method is lower than or equal to 1×1019 spins/cm3.

公开(公告)号：US20220209128A1

公开(公告)日：2022-06-30

申请号：US17605379

申请日：2020-04-21

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Takumu OKUYAMA ,  Hiromi SEO ,  Naoaki HASHIMOTO ,  Yusuke TAKITA ,  Tsunenori SUZUKI ,  Satoshi SEO

IPC: H01L51/00 ,  C09K11/02 ,  C09K11/06

Abstract: A novel light-emitting device is provided. A light-emitting device with high emission efficiency is provided. A light-emitting device with a favorable lifetime is provided. A light-emitting device with low driving voltage is provided. A light-emitting device with favorable display quality is provided. A light-emitting device that includes an anode, a cathode, and an EL layer positioned between the anode and the cathode, in which the EL layer includes a hole-injection layer, a light-emitting layer, and an electron-transport layer; in which the electron-transport layer contains an electron-transport material and an alkali metal, an alkaline earth metal, a compound of an alkali metal or an alkaline earth metal, or a complex thereof; and in which the resistivity of the hole-injection layer is within a certain range, is provided.

公开(公告)号：US20220158100A1

公开(公告)日：2022-05-19

申请号：US17439527

申请日：2020-03-11

Applicant: Semiconductor Energy Laboratory Co., Ltd.

Inventor： Hiroshi KADOMA ,  Satoshi SEO ,  Takumu OKUYAMA ,  Naoaki HASHIMOTO ,  Yusuke TAKITA ,  Tsunenori SUZUKI

IPC: H01L51/00 ,  C07D401/10 ,  C07D403/10

Abstract: A quinoxaline derivative that is a novel organic compound is provided. A quinoxaline derivative represented by General Formula (G1) has a structure in which a quinoxaline skeleton is bonded to the 9-position of an anthracene skeleton, the 10-position of the anthracene skeleton is bonded to a heteroaromatic ring, and the 3-position of the heteroaromatic ring is nitrogen. In General Formula (G1) shown above, a and b each independently represent a substituted or unsubstituted arylene group having 6 to 13 carbon atoms in a ring. In addition, m and n are each independently 0, 1, or 2.

公开(公告)号：US20220115615A1

公开(公告)日：2022-04-14

申请号：US17423665

申请日：2020-01-16

Applicant: Semiconductor Energy Laboratory Co., Ltd.

Inventor： Yusuke TAKITA ,  Tsunenori SUZUKI ,  Naoaki HASHIMOTO ,  Takumu OKUYAMA ,  Satoshi SEO

IPC: H01L51/50 ,  H01L51/00

Abstract: A novel light-emitting device is provided. Alternatively, a light-emitting device having a long driving lifetime at high temperature is provided. The light-emitting device includes an anode, a cathode, and an EL layer positioned between the anode and the cathode. The EL layer includes a first layer, a second layer, a third layer, and a light-emitting layer in this order from the anode side. The first layer includes a first organic compound and a second organic compound. The second layer includes a third organic compound. The third layer includes a fourth organic compound. The light-emitting layer includes a fifth organic compound and an emission center substance. The first organic compound exhibits an electron-accepting property with respect to the second organic compound. A difference between HOMO levels of the fourth organic compound and the fifth organic compound is less than or equal to 0.24 eV.

公开(公告)号：US20210367177A1

公开(公告)日：2021-11-25

申请号：US16977663

申请日：2019-09-20

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Satoshi SEO ,  Tsunenori SUZUKI ,  Takumu OKUYAMA ,  Yusuke TAKITA ,  Naoaki HASHIMOTO ,  Hiromi SEO

IPC: H01L51/50 ,  H01L51/00

Abstract: A light-emitting device including an EL layer including a first layer, a second layer, a third layer, a light-emitting layer, and a fourth layer in this order from the anode side is provided. The first layer contains a first organic compound and a second organic compound. The light-emitting layer contains a sixth organic compound. The fourth layer contains a seventh organic compound. The first organic compound exhibits an electron-accepting property with respect to the second organic compound. A HOMO level of the second organic compound is higher than or equal to −5.7 eV and lower than or equal to −5.2 eV. A HOMO level of the third organic compound is equal to or deeper than the HOMO level of the second organic compound. A difference between the HOMO levels of the second organic compound and the third organic compound is less than or equal to 0.2 eV. A LUMO level of the sixth organic compound is shallower than a LUMO level of the seventh organic compound.

公开(公告)号：US20210119133A1

公开(公告)日：2021-04-22

申请号：US17057830

申请日：2019-05-22

Applicant: Semiconductor Energy Laboratory Co., Ltd.

Inventor： Hiroshi KADOMA ,  Satoshi SEO ,  Hiroki SUZUKI ,  Naoaki HASHIMOTO ,  Tsunenori SUZUKI

IPC: H01L51/00 ,  C07C15/38

Abstract: A novel compound is provided. Alight-emitting device having high emission efficiency and a long lifetime is also provided. An organic compound is represented by General Formula (G2), in which a benzo[a]anthracene skeleton is bonded to the 2-position of an anthracene skeleton. In General Formula (G2), R1 to R3, R5 to R12, and R21 to R29 each independently represent any one of hydrogen, an alkyl group having 1 to 6 carbon atoms, a cycloalkyl group having 3 to 6 carbon atoms, and a substituted or unsubstituted aryl group having 6 to 13 carbon atoms in a ring. Another embodiment of the present invention is a light-emitting device including the compound.