公开(公告)号：US10535830B2

公开(公告)日：2020-01-14

申请号：US14623928

申请日：2015-02-17

Applicant: Semiconductor Energy Laboratory Co., Ltd.

Inventor： Toshiki Sasaki ,  Shogo Uesaka ,  Satoshi Seo

IPC: H01L51/50 ,  H01L51/52 ,  H01L51/00 ,  H01L29/08 ,  H01L35/24

Abstract: A light-emitting element with a high current efficiency is provided. A low-power consumption light-emitting device is also provided. In addition, low-power consumption electronic device and lighting device are provided. The light-emitting element includes an EL layer between a pair of electrodes. The EL layer includes a light-emitting layer. The light-emitting layer includes a first light-emitting layer and a second light-emitting layer. The emission peak of the second light-emitting layer is at a shorter wavelength than that of the first light-emitting layer. The first light-emitting layer includes a host material and a guest material. The LUMO level of the guest material is in the range of ±0.1 eV of the LUMO level of the host material.

公开(公告)号：US10535823B2

公开(公告)日：2020-01-14

申请号：US16170480

申请日：2018-10-25

Applicant: Semiconductor Energy Laboratory Co., Ltd.

Inventor： Kaori Ogita ,  Hiromi Nowatari ,  Harue Osaka ,  Takahiro Ushikubo ,  Satoshi Seo ,  Takako Takasu

IPC: H01L51/54 ,  C09K11/06 ,  H01L51/00 ,  H05B33/14 ,  C07F15/00

Abstract: A composite material which includes an organic compound and an inorganic compound and has a high carrier-transport property is provided. A composite material having a good property of carrier injection into an organic compound is provided. A composite material in which light absorption due to charge-transfer interaction is unlikely to occur is provided. A composite material having a high visible-light-transmitting property is provided. A composite material including a hydrocarbon compound and an inorganic compound exhibiting an electron-accepting property with respect to the hydrocarbon compound is provided. The hydrocarbon compound has a substituent bonded to a naphthalene skeleton, a phenanthrene skeleton, or a triphenylene skeleton and has a molecular weight of 350 to 2000, and the substituent has one or more rings selected from a benzene ring, a naphthalene ring, a phenanthrene ring, and a triphenylene ring.

公开(公告)号：US10529780B2

公开(公告)日：2020-01-07

申请号：US15899620

申请日：2018-02-20

Applicant: Semiconductor Energy Laboratory Co., Ltd.

Inventor： Ryohei Yamaoka ,  Satoshi Seo ,  Daiki Nakamura

IPC: H01L27/32 ,  H01L51/50 ,  H01L51/52

Abstract: A display device with a wide viewing angle is provided. A display device capable of displaying an image with a wide color gamut is provided. A display device includes a first light-emitting element, a second light-emitting element, and a third light-emitting element. The light-emitting elements each include a pair of electrodes and a light-emitting layer. One of the pair of electrodes includes a reflective electrode, and the other of the pair of electrodes includes a transflective electrode. The light-emitting layers of the light-emitting elements are different from each other. A first peak wavelength of the emission spectrum of the first light-emitting element is greater than or equal to 400 nm and less than or equal to 480 nm. A second peak wavelength of the emission spectrum of the second light-emitting element is greater than or equal to 580 nm and less than or equal to 700 nm. A third peak wavelength of the emission spectrum of the third light-emitting element is between the first peak wavelength and the second peak wavelength. The distance between the pair of electrodes of the first light-emitting element is longest and that of the second light-emitting element is second longest.

公开(公告)号：US10483288B2

公开(公告)日：2019-11-19

申请号：US16211658

申请日：2018-12-06

Applicant: Semiconductor Energy Laboratory Co., Ltd.

Inventor： Satoshi Seo ,  Kaoru Hatano

IPC: H01L27/12 ,  H01L27/32 ,  H01L33/58 ,  H01L33/50 ,  H01L29/786 ,  H01L51/50 ,  H01L51/52

Abstract: A lightweight flexible light-emitting device which is able to possess a curved display portion and display a full color image with high resolution and the manufacturing process thereof are disclosed. The light-emitting device comprises: a plastic substrate; an insulating layer with an adhesive interposed therebetween; a thin film transistor over the insulating layer; a protective insulating film over the thin film transistor; a color filter over the protective insulating film; an interlayer insulating film over the color filter; and a white-emissive light-emitting element formed over the interlayer insulating film and being electrically connected to the thin film transistor.

公开(公告)号：US10475856B2

公开(公告)日：2019-11-12

申请号：US15278591

申请日：2016-09-28

Applicant: Semiconductor Energy Laboratory Co., Ltd.

Inventor： Satoshi Seo ,  Hajime Kimura ,  Shunpei Yamazaki

IPC: H01L27/32 ,  H01L51/50 ,  G09G3/3233 ,  G09G3/20 ,  G09G3/3291

Abstract: It is an object to provide a light-emitting device and an electronic device which can provide an image with excellent image quality. One of the present inventions is a light-emitting device including a plurality of light-emitting elements each exhibiting a different emission color. At least one of the plurality of light-emitting elements has n light-emitting layers (n is a natural number, n≥2) between a pair of electrodes. Further, at least one of the n light-emitting layers includes a substance which provides emission from a triplet excitation state. In a light-emitting device having such a structure, an image is displayed by combining emissions from the plurality of light-emitting elements.

公开(公告)号：US10454052B2

公开(公告)日：2019-10-22

申请号：US15944013

申请日：2018-04-03

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Shunsuke Hosoumi ,  Takahiro Ishisone ,  Tatsuyoshi Takahashi ,  Satoshi Seo

IPC: H01L51/50 ,  H01L51/00

Abstract: A light-emitting element containing a fluorescent material and having high emission efficiency is provided. The light-emitting element contains the fluorescent material and a host material. The host material contains a first organic compound and a second organic compound. The first organic compound and the second organic compound can form an exciplex. The minimum value of a distance between centroids of the fluorescent material and at least one of the first organic compound and the second organic compound is 0.7 nm or more and 5 nm or less.

公开(公告)号：US10431752B2

公开(公告)日：2019-10-01

申请号：US15981060

申请日：2018-05-16

Applicant: Semiconductor Energy Laboratory Co., Ltd.

Inventor： Hideko Inoue ,  Tomoya Yamaguchi ,  Hiromi Seo ,  Tatsuyoshi Takahashi ,  Satoshi Seo

IPC: H01L51/00 ,  C07F15/00

Abstract: An organometallic iridium complex that has high emission efficiency and a long lifetime and emits deep red light (emission wavelength: around 700 nm) is provided. The organometallic iridium complex has a ligand that is represented by General Formula (G0) and has at least a dimethyl phenyl group and a quinoxaline skeleton. In the formula, R1 to R3 separately represent an alkyl group having 1 to 6 carbon atoms, a phenyl group, or a phenyl group having an alkyl group having 1 to 6 carbon atoms as a substituent.

公开(公告)号：US10403843B2

公开(公告)日：2019-09-03

申请号：US14483635

申请日：2014-09-11

Applicant: Semiconductor Energy Laboratory Co., Ltd.

Inventor： Hiromi Nowatari ,  Satoshi Seo ,  Nobuharu Ohsawa ,  Tetsuo Tsutsui

IPC: H01L51/50 ,  H01L51/00

Abstract: Light-emitting elements in which an increase of driving voltage can be suppressed are provided. Light-emitting devices whose power consumption is reduced by including such light-emitting elements are also provided. In a light-emitting element having an EL layer between an anode and a cathode, a first layer in which carriers can be produced is formed between the cathode and the EL layer and in contact with the cathode, a second layer which transfers electrons produced in the first layer is formed in contact with the first layer, and a third layer which injects the electrons received from the second layer into the EL layer is formed in contact with the second layer.

公开(公告)号：US20190245146A1

公开(公告)日：2019-08-08

申请号：US16385472

申请日：2019-04-16

Applicant: Semiconductor Energy Laboratory Co., Ltd.

Inventor： Satoshi Seo ,  Tatsuyoshi Takahashi ,  Kyoko Takeda ,  Kenta Abe ,  Hiroki Suzuki

IPC: H01L51/00 ,  G06F3/041 ,  C07F15/00 ,  H01L51/50 ,  H01L27/32 ,  H05B33/20 ,  H05B33/14 ,  C09K11/06 ,  G06F3/045

Abstract: A light-emitting element with a lower voltage and higher emission efficiency is provided. 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, and a difference between them is larger than 0 eV and smaller than or equal to 0.5 eV. Furthermore, the HOMO level of the first organic compound is lower than 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：US10373550B2

公开(公告)日：2019-08-06

申请号：US16027892

申请日：2018-07-05

Applicant: Semiconductor Energy Laboratory Co., Ltd.

Inventor： Mitsuaki Osame ,  Aya Anzai ,  Yoshifumi Tanada ,  Keisuke Miyagawa ,  Satoshi Seo ,  Shunpei Yamazaki

IPC: G09G3/32 ,  H01L33/00 ,  G09G3/3233 ,  G09G3/3258 ,  G09G3/3266 ,  G09G3/3291

Abstract: A light emitting device that achieves long life, and which is capable of performing high duty drive, by suppressing initial light emitting element deterioration is provided. Reverse bias application to an EL element (109) is performed one row at a time by forming a reverse bias electric power source line (112) and a reverse bias TFT (108). Reverse bias application can therefore be performed in synchronous with operations for write-in of an image signal, light emission, erasure, and the like. Reverse bias application therefore becomes possible while maintaining a duty equivalent to that of a conventional driving method.