公开(公告)号：US20220238810A1

公开(公告)日：2022-07-28

申请号：US17713931

申请日：2022-04-05

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Takahiro ISHISONE ,  Shunsuke HOSOUMI ,  Tatsuyoshi TAKAHASHI ,  Satoshi SEO

IPC: H01L51/00 ,  H01L51/50

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 proportion of a delayed fluorescence component in light emitted from the exciplex is higher than or equal to 5%, and the delayed fluorescence component contains a delayed fluorescence component whose fluorescence lifetime is 10 ns or longer and 50 μs or shorter.

公开(公告)号：US20180226598A1

公开(公告)日：2018-08-09

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

CPC classification number: H01L51/5012 ,  H01L51/006 ,  H01L51/0061 ,  H01L51/0072 ,  H01L51/0074 ,  H01L2251/5384 ,  Y02P20/582

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：US20220131146A1

公开(公告)日：2022-04-28

申请号：US17506864

申请日：2021-10-21

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Jo SAITO ,  Yohei MOMMA ,  Kunihiro FUKUSHIMA ,  Shunsuke HOSOUMI ,  Kazuki TANEMURA ,  Tetsuya KAKEHATA ,  Shunpei YAMAZAKI ,  Toshikazu OHNO ,  Mayumi MIKAMI ,  Tatsuyoshi TAKAHASHI ,  Kazuya SHIMADA

IPC: H01M4/58 ,  H01M10/0569 ,  H01M4/38 ,  H01M10/052

Abstract: The present invention relates to a secondary battery and an electronic device. The secondary battery includes a positive electrode active material which exhibits a broad peak at around 4.55 V in a dQ/dVvsV curve obtained when the charge depth is increased. The secondary battery includes a positive electrode active material which, even when the charge voltage is greater than or equal to 4.6 V and less than or equal to 4.8 V and the charge depth is greater than or equal to 0.8 and less than 0.9, does not have the H1-3 type structure and can maintain a crystal structure where a shift in CoO2 layers is inhibited. The broad peak at around 4.55 V in the dQ/dVvsV curve indicates that a change in the energy necessary for extraction of lithium at around the voltage is small and a change in the crystal structure is small. Accordingly, the positive electrode active material hardly suffers a shift in CoO2 layers and a volume change and is relatively stable even when the charge depth is large.

公开(公告)号：US20200321541A1

公开(公告)日：2020-10-08

申请号：US16851344

申请日：2020-04-17

Applicant: Semiconductor Energy Laboratory Co., Ltd.

Inventor： Shunsuke HOSOUMI ,  Tatsuyoshi TAKAHASHI ,  Takahiro ISHISONE ,  Satoshi SEO

IPC: H01L51/00 ,  H01L51/50

Abstract: A light-emitting element which exhibits high emission efficiency is provided without using a rare metal as a light-emitting material. The light-emitting element including a first electrode, a second electrode, and a layer containing organic compounds between the first electrode and the second electrode is provided. The layer containing organic compounds includes a light-emitting layer at least containing a fluorescent substance. The light-emitting layer includes a fluorescent substance, a first organic compound, and a second organic compound. The combination of the first organic compound and the second organic compound forms an exciplex. The first organic compound is a substance having the first skeleton including a benzofuropyrimidine skeleton or a benzothienopyrimidine skeleton.

公开(公告)号：US20200227653A1

公开(公告)日：2020-07-16

申请号：US16807492

申请日：2020-03-03

Applicant: Semiconductor Energy Laboratory Co., Ltd.

Inventor： Shunsuke HOSOUMI ,  Tatsuyoshi TAKAHASHI ,  Takahiro ISHISONE ,  Satoshi SEO

IPC: H01L51/00 ,  C09K11/02 ,  C09K11/06 ,  C07D495/04 ,  C07D491/048

Abstract: A light-emitting element having high emission efficiency is provided. A light-emitting element which has high emission efficiency without using a rare metal as a light-emitting material is provided. A light-emitting element includes a first electrode, a second electrode, and a layer between the first electrode and the second electrode. The layer contains a first organic compound and a second organic compound. The second organic compound has a carbazole skeleton and a substituted or unsubstituted bivalent aromatic hydrocarbon group. The second organic compound further has a benzofuropyrimidine skeleton or a benzothienopyrimidine skeleton. The aromatic hydrocarbon group is bonded to the carbazole skeleton. The aromatic hydrocarbon group is bonded to the benzofuropyrimidine skeleton or the benzothienopyrimidine skeleton. The first organic compound and the second organic compound can form an exciplex.

公开(公告)号：US20230157042A1

公开(公告)日：2023-05-18

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

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.

公开(公告)号：US20220414499A1

公开(公告)日：2022-12-29

申请号：US17773868

申请日：2020-11-06

Applicant: Semiconductor Energy Laboratory Co., Ltd.

Inventor： Shunsuke HOSOUMI ,  Kunihiko SUZUKI ,  Kanta ABE ,  Yuji IWAKI ,  Daigo SHIMADA ,  Etsuko KAMATA

IPC: G06N5/04 ,  H01L21/66

Abstract: A property prediction system for a semiconductor element is provided. The property prediction system includes a memory unit, an input unit, a processing unit, and an arithmetic unit. The processing unit has a function of creating a learning data set from first data stored in the memory unit, a function of creating prediction data from second data supplied from the input unit, a function of converting qualitative data (a material name or a compositional formula) into quantitative data (the properties of an element and a composition), and a function of performing extraction or removal on the first data and the second data. The first data includes step lists of first to m-th semiconductor elements (m is an integer of 2 or more) and the properties of the first to m-th semiconductor elements. The second data includes a step list of an (m+1)-th semiconductor element. The arithmetic unit having a function of performing learning and inference of supervised learning performs learning on the basis of the learning data set and makes an inference of a semiconductor element from the prediction data.

公开(公告)号：US20200098997A1

公开(公告)日：2020-03-26

申请号：US16473053

申请日：2017-12-19

Applicant: Semiconductor Energy Laboratory Co., Ltd.

Inventor： Takeyoshi WATABE ,  Satoshi SEO ,  Nozomi KOMATSU ,  Ryohei YAMAOKA ,  Harue OSAKA ,  Kunihiko SUZUKI ,  Shunsuke HOSOUMI

IPC: H01L51/00

Abstract: A highly reliable light-emitting element having high emission efficiency is provided. The light-emitting element includes a light-emitting layer including a first organic compound and a guest material. The first organic compound has a substituted or unsubstituted carbazole skeleton. In the light-emitting layer, the weight ratio of a hydrocarbon group substitution product in which at least one of hydrogen atoms in the first organic compound is substituted by a hydrocarbon group having 1 to 6 carbon atoms to the first organic compound is greater than 0 and less than or equal to 0.1.

公开(公告)号：US20160064684A1

公开(公告)日：2016-03-03

申请号：US14837083

申请日：2015-08-27

Applicant: Semiconductor Energy Laboratory Co., Ltd.

Inventor： Satoshi SEO ,  Nobuharu OHSAWA ,  Shunsuke HOSOUMI ,  Takahiro ISHISONE

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

CPC classification number: H01L51/5016 ,  H01L51/5012 ,  H01L2251/552

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.

Abstract translation: 提供具有发光效率高的发光元件，其包括作为发光物质的荧光材料。 发光元件包括一对电极和一对电极之间的EL层。 EL层包括发光层。 发光层包括主体材料和客体材料。 主体材料在单重激发能级和三线态激发能级之间具有大于0eV且小于或等于0.2eV的差异。 客体材料能够发出荧光。 主体材料的三线态激发能级高于客体材料的三线态激发能级。

公开(公告)号：US20240379941A1

公开(公告)日：2024-11-14

申请号：US18576873

申请日：2022-06-27

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Jo SAITO ,  Tatsuyoshi TAKAHASHI ,  Kunihiko SUZUKI ,  Shunsuke HOSOUMI ,  Mayumi MIKAMI ,  Kazuki TANEMURA ,  Yuji IWAKI ,  Shunpei YAMAZAKI

IPC: H01M4/36 ,  C01G51/00 ,  H01M4/02 ,  H01M4/1315 ,  H01M4/525 ,  H01M10/0525

Abstract: A positive electrode active material that is unlikely to generate defects even when charging and discharging at a high voltage and/or at a high temperature is provided. A positive electrode active material in which crystal structures are unlikely to collapse even when charging and discharging are repeated is also provided. The positive electrode active material contains lithium, cobalt, oxygen, and an additive element. The positive electrode active material includes a surface portion, an inner portion. The positive electrode active material contains the additive element in the surface portion. The surface portion is a region extending from a surface of the positive electrode active material to a depth of 10 nm or less toward the inner portion, and the surface portion and the inner portion are topotaxy. A degree of diffusion of the additive element vary between crystal planes of the surface portion, and the additive element is at least one or two or more selected from nickel, aluminum, and magnesium.