公开(公告)号：US12225748B2

公开(公告)日：2025-02-11

申请号：US18788835

申请日：2024-07-30

Applicant: Semiconductor Energy Laboratory Co., Ltd.

Inventor： Satoshi Seo ,  Tatsuyoshi Takahashi ,  Takeyoshi Watabe ,  Satomi Mitsumori

IPC: H10K50/12 ,  C07F15/00 ,  C09K11/06 ,  H10K50/11 ,  H10K50/15 ,  H10K50/16 ,  H10K59/12 ,  H10K59/38 ,  H10K59/40 ,  H10K85/30 ,  H10K85/60 ,  H10K101/00 ,  H10K101/10 ,  H10K101/30 ,  H10K101/40

Abstract: A light-emitting element with high emission efficiency. The light-emitting element includes a first organic compound, a second organic compound, and a guest material. The LUMO level of the first organic compound is lower than the LUMO level of the second organic compound. The HOMO level of the first organic compound is lower than the HOMO level of the second organic compound. The HOMO level of the guest material is higher than the HOMO level of the second organic compound. The energy difference between the LUMO level of the guest material and the HOMO level of the guest material is larger than the energy difference between the LUMO level of the first organic compound and the HOMO level of the second organic compound. The guest material has a function of converting triplet excitation energy into light emission. The first organic compound and the second organic compound form an exciplex.

公开(公告)号：US12127479B2

公开(公告)日：2024-10-22

申请号：US18381846

申请日：2023-10-19

Applicant: Semiconductor Energy Laboratory Co., Ltd.

Inventor： Satoshi Seo ,  Takao Hamada ,  Tatsuyoshi Takahashi ,  Yasushi Kitano ,  Hiroki Suzuki ,  Hideko Inoue

IPC: H01L51/50 ,  C07D403/14 ,  H10K85/60 ,  H10K85/30

CPC classification number: H10K85/6572 ,  C07D403/14 ,  H10K85/342 ,  H10K85/633 ,  H10K85/636 ,  Y02P20/582

Abstract: To provide a light-emitting element with an improved reliability, a light-emitting element with a high current efficiency (or a high quantum efficiency), and a novel dibenzo[f,h]quinoxaline derivative that is favorably used in a light-emitting element which is one embodiment of the present invention. A light-emitting element includes an EL layer between an anode and a cathode. The EL layer includes a light-emitting layer; the light-emitting layer contains a first organic compound having an electron-transport property and a hole-transport property, a second organic compound having a hole-transport property, and a light-emitting substance; the combination of the first organic compound and the second organic compound forms an exciplex; the HOMO level of the first organic compound is lower than the HOMO level of the second organic compound; and a difference between the HOMO level of the first organic compound and the HOMO level of the second organic compound is less than or equal to 0.4 eV.

公开(公告)号：US12127418B2

公开(公告)日：2024-10-22

申请号：US18084642

申请日：2022-12-20

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Satoshi Seo ,  Nobuharu Ohsawa

IPC: H10K50/11 ,  H10K50/13 ,  H10K59/32 ,  H10K59/35 ,  H10K59/38 ,  H10K101/40

CPC classification number: H10K50/11 ,  H10K50/131 ,  H10K59/351 ,  H10K59/32 ,  H10K59/38 ,  H10K2101/40

Abstract: A light-emitting device, an electronic device, and a display device each consume less power are provided. The light-emitting device includes a first light-emitting element, a second light-emitting element, and a third light-emitting element that share an EL layer. The EL layer includes a layer containing a light-emitting material that emits blue fluorescence and a layer containing a light-emitting material that emits yellow or green phosphorescence. Light emitted from the second light-emitting element enters a color filter layer or a second color conversion layer, and light emitted from the third light-emitting element enters a first color conversion layer.

公开(公告)号：US12100795B2

公开(公告)日：2024-09-24

申请号：US16796978

申请日：2020-02-21

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Satoko Shitagaki ,  Satoshi Seo ,  Nobuharu Ohsawa ,  Hideko Inoue ,  Kunihiko Suzuki

IPC: H01L51/00 ,  C07D209/86 ,  C07D239/26 ,  C07D241/12 ,  C07D333/76 ,  C07D409/10 ,  C07D471/04 ,  C07F15/00 ,  C09K11/02 ,  C09K11/06 ,  H10K50/11 ,  H10K85/30 ,  H10K85/60 ,  H10K101/00 ,  H10K101/10 ,  H10K101/30

CPC classification number: H10K85/342 ,  C07D209/86 ,  C07D239/26 ,  C07D241/12 ,  C07D333/76 ,  C07D409/10 ,  C07D471/04 ,  C07F15/0033 ,  C09K11/025 ,  C09K11/06 ,  H10K50/11 ,  H10K85/631 ,  H10K85/633 ,  H10K85/636 ,  H10K85/6572 ,  H10K85/6576 ,  C09K2211/1007 ,  C09K2211/1074 ,  C09K2211/185 ,  H10K85/615 ,  H10K85/624 ,  H10K85/626 ,  H10K2101/10 ,  H10K2101/27 ,  H10K2101/30 ,  H10K2101/90

Abstract: A light-emitting element having high external quantum efficiency is provided. A light-emitting element having a long lifetime is provided. A light-emitting element is provided which includes a light-emitting layer containing a phosphorescent compound, a first organic compound, and a second organic compound between a pair of electrodes, in which a combination of the first organic compound and the second organic compound forms an exciplex (excited complex). The light-emitting element transfers energy by utilizing an overlap between the emission spectrum of the exciplex and the absorption spectrum of the phosphorescent compound and thus has high energy transfer efficiency. Therefore, a light-emitting element having high external quantum efficiency can be obtained.

公开(公告)号：US12082429B2

公开(公告)日：2024-09-03

申请号：US17048642

申请日：2019-10-03

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Satoshi Seo ,  Tsunenori Suzuki ,  Takumu Okuyama ,  Yusuke Takita ,  Naoaki Hashimoto ,  Hiromi Seo ,  Nobuharu Ohsawa ,  Toshiki Sasaki ,  Shunpei Yamazaki

IPC: H10K50/11 ,  H10K50/15 ,  H10K50/16 ,  H10K50/17 ,  H10K85/60 ,  H10K101/30 ,  H10K101/40 ,  H10K85/30 ,  H10K101/10

CPC classification number: H10K50/11 ,  H10K50/15 ,  H10K50/16 ,  H10K50/17 ,  H10K85/30 ,  H10K85/342 ,  H10K85/615 ,  H10K85/622 ,  H10K85/626 ,  H10K85/636 ,  H10K85/657 ,  H10K85/6572 ,  H10K85/6574 ,  H10K85/6576 ,  H10K2101/10 ,  H10K2101/30 ,  H10K2101/40

Abstract: A novel light-emitting device is provided. Alternatively, a light-emitting device with high emission efficiency is provided. Alternatively, a light-emitting device having a long lifetime is provided. Alternatively, a light-emitting device having low driving voltage is provided. 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 includes a first organic compound and a second organic compound. The fourth layer includes a seventh organic compound. The first organic compound exhibits an electron-accepting property with respect to the second organic compound. The HOMO level of the second organic compound is from −5.7 eV to −5.4 eV. The HOMO level of the seventh organic compound is −6.0 eV or higher.

公开(公告)号：US12063856B2

公开(公告)日：2024-08-13

申请号：US17703524

申请日：2022-03-24

Applicant: Semiconductor Energy Laboratory Co., Ltd.

Inventor： Yui Yoshiyasu ,  Naoaki Hashimoto ,  Tatsuyoshi Takahashi ,  Sachiko Kawakami ,  Satoshi Seo

IPC: H10K85/60 ,  H10K50/16

CPC classification number: H10K85/6572 ,  H10K85/615 ,  H10K85/626 ,  H10K85/654 ,  H10K50/16

Abstract: A novel mixed material for a light-emitting device with improved heat resistance is provided. The mixed material for a light-emitting device includes a first heteroaromatic compound and a second heteroaromatic compound. The first heteroaromatic compound includes a first heteroaromatic ring. The first heteroaromatic ring includes a ring including two or more nitrogen atoms and any one of a benzene ring and a pyridine ring or a ring including a diazine ring or a triazine ring. The second heteroaromatic compound includes a second heteroaromatic ring. The second heteroaromatic ring includes a ring including two or more nitrogen atoms and any one of a benzene ring and a pyridine ring or a ring including a diazine ring or a triazine ring. A structure of the first heteroaromatic ring is different from a structure of the second heteroaromatic ring.

公开(公告)号：US12029057B2

公开(公告)日：2024-07-02

申请号：US18134847

申请日：2023-04-14

Applicant: Semiconductor Energy Laboratory Co., Ltd.

Inventor： Satoshi Seo ,  Tsunenori Suzuki ,  Yusuke Takita ,  Takumu Okuyama ,  Anna Tada

IPC: H10K50/11 ,  H10K50/15 ,  H10K101/30 ,  H10K101/40

CPC classification number: H10K50/11 ,  H10K50/15 ,  H10K2101/30 ,  H10K2101/40

Abstract: A novel light-emitting device is provided. Alternatively, a light-emitting device with favorable emission efficiency is provided. Alternatively, a light-emitting device with a favorable lifetime is provided. Alternatively, a light-emitting device with a low driving voltage is provided. Provided is a light-emitting device including an anode, a cathode, and a layer including an organic compound that is positioned between the anode and the cathode, in which the layer including the organic compound includes a first layer, a second layer, and a light-emitting layer in this order from the anode side, the first layer includes a first substance and a second substance, the second layer includes a third substance, the first substance is an organic compound a HOMO level of which is higher than or equal to −5.8 eV and lower than or equal to −5.4 eV, the second substance is a substance that has an electron-acceptor property with respect to the first substance, and the third substance is an organic compound having a structure in which at least two substituents comprising carbazole rings are bonded to a naphthalene ring.

公开(公告)号：US20240215287A1

公开(公告)日：2024-06-27

申请号：US18527505

申请日：2023-12-04

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Satoshi Seo ,  Satoko Shitagaki ,  Nobuharu Ohsawa ,  Hideko Inoue ,  Kunihiko Suzuki

IPC: H10K50/12 ,  C07D409/10 ,  C09K11/06 ,  H05B33/14 ,  H10K50/11 ,  H10K85/30 ,  H10K85/60 ,  H10K101/10

CPC classification number: H10K50/121 ,  C07D409/10 ,  C09K11/06 ,  H05B33/14 ,  H10K50/11 ,  H10K85/6572 ,  H10K85/6576 ,  C09K2211/1007 ,  C09K2211/1011 ,  C09K2211/1029 ,  C09K2211/1044 ,  C09K2211/1088 ,  C09K2211/1092 ,  C09K2211/185 ,  H10K85/342 ,  H10K85/624 ,  H10K85/626 ,  H10K85/631 ,  H10K85/633 ,  H10K85/636 ,  H10K2101/10

Abstract: Provided is a light-emitting element which includes a light-emitting layer containing a phosphorescent compound, a first organic compound, and a second organic compound between a pair of electrodes. A combination of the first organic compound and the second organic compound forms an exciplex (excited complex). An emission spectrum of the exciplex overlaps with an absorption band located on the longest wavelength side of an absorption spectrum of the phosphorescent compound. A peak wavelength of the emission spectrum of the exciplex is longer than or equal to a peak wavelength of the absorption band located on the longest wavelength side of the absorp-tion spectrum of the phosphorescent compound.

公开(公告)号：US12022725B2

公开(公告)日：2024-06-25

申请号：US17173713

申请日：2021-02-11

Applicant: Semiconductor Energy Laboratory Co., Ltd.

Inventor： Takeyoshi Watabe ,  Satoshi Seo

IPC: H10K85/30 ,  C07F15/00 ,  C09K11/06 ,  H10K85/60 ,  H10K30/00 ,  H10K50/11 ,  H10K50/16 ,  H10K50/17 ,  H10K50/84 ,  H10K59/12 ,  H10K59/38 ,  H10K59/40 ,  H10K71/00 ,  H10K71/16 ,  H10K102/00

CPC classification number: H10K85/342 ,  C07F15/0033 ,  C09K11/06 ,  H10K85/615 ,  H10K85/626 ,  H10K85/631 ,  H10K85/633 ,  H10K85/636 ,  H10K85/654 ,  H10K85/6572 ,  H10K85/6576 ,  C09K2211/1029 ,  C09K2211/1044 ,  C09K2211/185 ,  H10K30/00 ,  H10K50/11 ,  H10K50/16 ,  H10K50/171 ,  H10K50/84 ,  H10K59/12 ,  H10K59/38 ,  H10K59/40 ,  H10K71/00 ,  H10K71/164 ,  H10K2102/351

Abstract: An electronic device with high outcoupling efficiency or a high light-trapping effect is provided.
The electronic device includes a first layer and a second layer between a first electrode and a second electrode, the first layer is included between the first electrode and the second layer, the first layer includes a first organic compound and a first substance, the refractive index of a thin film of the first organic compound is higher than or equal to 1 and lower than or equal to 1.75, the first substance has an electron-accepting property, and the second layer has a function of emitting or absorbing light.

公开(公告)号：US11997861B2

公开(公告)日：2024-05-28

申请号：US18100054

申请日：2023-01-23

Applicant: Semiconductor Energy Laboratory Co., Ltd.

Inventor： Satoshi Seo ,  Nobuharu Ohsawa ,  Shunsuke Hosoumi ,  Takahiro Ishisone

IPC: H10K50/11 ,  H10K101/10 ,  H10K101/30

CPC classification number: H10K50/11 ,  H10K2101/10 ,  H10K2101/30

Abstract: A light-emitting element having high emission efficiency which includes a fluorescent material as a light-emitting substance is provided. A light-emitting element includes a pair of electrodes and an EL layer between the pair of electrodes. The EL layer includes a light-emitting layer. The light-emitting layer includes a host material and a guest material. The host material has a difference of more than 0 eV and less than or equal to 0.2 eV between a singlet excitation energy level and a triplet excitation energy level. The guest material is capable of emitting fluorescence. The triplet excitation energy level of the host material is higher than a triplet excitation energy level of the guest material.