公开(公告)号：US20240292648A1

公开(公告)日：2024-08-29

申请号：US18645743

申请日：2024-04-25

Applicant: Semiconductor Energy Laboratory Co., Ltd.

Inventor： Satoshi SEO ,  Hiromi SEO ,  Kunihiko SUZUKI ,  Kanta ABE ,  Yuji IWAKI ,  Naoaki HASHIMOTO ,  Tsunenori SUZUKI

IPC: H10K50/16 ,  H10K50/11 ,  H10K50/15 ,  H10K50/17 ,  H10K50/81 ,  H10K50/82 ,  H10K59/00 ,  H10K85/30 ,  H10K101/40

CPC classification number: H10K50/16 ,  H10K50/11 ,  H10K50/15 ,  H10K50/171 ,  H10K50/81 ,  H10K50/82 ,  H10K59/00 ,  H10K85/321 ,  H10K2101/40

Abstract: A novel light-emitting device is provided. A light-emitting device with high emission efficiency is provided. A light-emitting device with a long 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 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 is positioned between the anode and the light-emitting layer. The electron-transport layer is positioned between the light-emitting layer and the cathode. The hole-injection layer contains a first substance and a second substance. The first substance is an organic compound which has a hole-transport property and a HOMO level higher than or equal to −5.7 eV and lower than or equal to −5.4 eV. The second substance exhibits an electron-accepting property with respect to the first substance. The electron-transport layer contains a material whose resistance decreases with current flowing therethrough.

公开(公告)号：US20220344654A1

公开(公告)日：2022-10-27

申请号：US17642323

申请日：2020-09-07

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Shunpei YAMAZAKI ,  Tatsuyoshi TAKAHASHI ,  Kunihiko SUZUKI ,  Kanta ABE ,  Yuji IWAKI

IPC: H01M4/525 ,  H01M4/36 ,  H01M10/0525 ,  H01M10/0562 ,  H01M10/0585 ,  H01M50/431

Abstract: Provided is a positive electrode for a secondary battery, which has a small change in a crystal structure due to charging and discharging and has excellent cycle performance. The positive electrode for a secondary battery includes n positive electrode active material layers (n is an integer greater than or equal to 2), n−1 separation layer(s), and a positive electrode current collector layer. The positive electrode active material layers and the separation layer(s) are alternately stacked. The positive electrode active material layer contains lithium, cobalt, and oxygen. The separation layer contains a titanium compound. Titanium oxide and titanium nitride are preferable as the titanium compound, and titanium oxide is particularly preferable.

公开(公告)号：US20240057474A1

公开(公告)日：2024-02-15

申请号：US18376537

申请日：2023-10-04

Applicant: Semiconductor Energy Laboratory Co., Ltd.

Inventor： Takao HAMADA ,  Hiromi SEO ,  Kanta ABE ,  Kyoko TAKEDA ,  Satoshi SEO

IPC: H10K85/60 ,  C07D209/86 ,  H10K50/11 ,  H10K50/12 ,  H10K85/30 ,  C09K11/02 ,  C09K11/06

CPC classification number: H10K85/633 ,  C07D209/86 ,  H10K50/11 ,  H10K50/12 ,  H10K85/342 ,  H10K85/636 ,  H10K85/654 ,  H10K85/6572 ,  H10K85/6576 ,  C09K11/025 ,  C09K11/06 ,  H10K50/15

Abstract: A light-emitting element having a long lifetime is provided. A light-emitting element exhibiting high emission efficiency in a high luminance region is provided. A light-emitting element includes a light-emitting layer between a pair of electrodes. The light-emitting layer contains a first organic compound, a second organic compound, and a phosphorescent compound. The first organic compound is represented by a general formula (G0). The molecular weight of the first organic compound is greater than or equal to 500 and less than or equal to 2000. The second organic compound is a compound having an electron-transport property. In the general formula (G0), Ar1 and Ar2 each independently represent a fluorenyl group, a spirofluorenyl group, or a biphenyl group, and Ar3 represents a substituent including a carbazole skeleton.

公开(公告)号：US20210328145A1

公开(公告)日：2021-10-21

申请号：US17345430

申请日：2021-06-11

Applicant: Semiconductor Energy Laboratory Co., Ltd.

Inventor： Takao HAMADA ,  Hiromi SEO ,  Kanta ABE ,  Kyoko TAKEDA ,  Satoshi SEO

IPC: H01L51/00 ,  H01L51/50 ,  C07D209/86 ,  C09K11/02 ,  C09K11/06

Abstract: A light-emitting element having a long lifetime is provided. A light-emitting element exhibiting high emission efficiency in a high luminance region is provided. A light-emitting element includes a light-emitting layer between a pair of electrodes. The light-emitting layer contains a first organic compound, a second organic compound, and a phosphorescent compound. The first organic compound is represented by a general formula (G0). The molecular weight of the first organic compound is greater than or equal to 500 and less than or equal to 2000. The second organic compound is a compound having an electron-transport property. In the general formula (G0), Ar1 and Ar2 each independently represent a fluorenyl group, a spirofluorenyl group, or a biphenyl group, and Ar3 represents a substituent including a carbazole skeleton.

公开(公告)号：US20240396048A1

公开(公告)日：2024-11-28

申请号：US18697576

申请日：2022-09-26

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Yusuke YOSHITANI ,  Noriko MIYAIRI ,  Mayumi MIKAMI ,  Kazuki TANEMURA ,  Kanta ABE ,  Tatsuyoshi TAKAHASHI ,  Kenta NAKANISHI ,  Shunpei YAMAZAKI

IPC: H01M4/62 ,  H01M4/02 ,  H01M4/36 ,  H01M4/525 ,  H01M4/58

Abstract: A secondary battery includes a positive electrode active material layer including a primary particle containing lithium, nickel, cobalt, and manganese and a secondary particle formed by aggregation of the primary particles, and calcium is contained between adjacent primary particles of the secondary particle. With such a structure, calcium inhibits oxygen release from the primary particle in charging and discharging, whereby the reliability of the secondary battery is improved.

公开(公告)号：US20220250937A1

公开(公告)日：2022-08-11

申请号：US17587819

申请日：2022-01-28

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Shunpei YAMAZAKI ,  Yusuke YOSHITANI ,  Takashi HIRAHARA ,  Kunihiko SUZUKI ,  Kanta ABE

IPC: C01G53/00 ,  H01M10/0525

Abstract: A novel method for manufacturing a positive electrode active material is provided. In the method, an acid solution is formed by mixing an aqueous solution containing nickel, cobalt, and manganese with an aqueous solution containing a first additive element; a composite hydroxide containing nickel, cobalt, manganese, and the first additive element is formed by a reaction between the acid solution and an alkaline solution; the composite hydroxide and a lithium source are mixed and heated (first heating) to form a composite oxide; and the composite oxide and a second additive element source are mixed and heated (second heating). The first additive element is at least one of gallium, boron, aluminum, indium, magnesium, and fluorine, and the second additive element is at least one of calcium, gallium, boron, aluminum, indium, magnesium, and fluorine.

公开(公告)号：US20240030429A1

公开(公告)日：2024-01-25

申请号：US18251776

申请日：2021-10-28

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Shunpei YAMAZAKI ,  Ryo ARASAWA ,  Shunichi ITO ,  Shiori SAGA ,  Yohei MOMMA ,  Jo SAITO ,  Kunihiko SUZUKI ,  Teppei OGUNI ,  Yuji IWAKI ,  Kanta ABE

IPC: H01M4/525 ,  H01M4/46 ,  H01M10/0525

CPC classification number: H01M4/525 ,  H01M4/463 ,  H01M4/466 ,  H01M10/0525 ,  H01M2004/028

Abstract: A positive electrode active material in which the number of defects that cause deterioration is small or progress of the defect is suppressed is provided. The positive electrode active material is used for a secondary battery. The positive electrode active material contains lithium cobalt oxide containing an additive element. After a cycle test is performed on a cell that uses the positive electrode active material for a positive electrode and a lithium electrode as a counter electrode, the positive electrode active material includes a defect and contains at least the same element as the additive element in a region in the vicinity of the defect. The additive element is contained also in a surface portion of the positive electrode active material.

公开(公告)号：US20190074442A1

公开(公告)日：2019-03-07

申请号：US16182689

申请日：2018-11-07

Applicant: Semiconductor Energy Laboratory Co., Ltd.

Inventor： Takao HAMADA ,  Hiromi SEO ,  Kanta ABE ,  Kyoko TAKEDA ,  Satoshi SEO

IPC: H01L51/00 ,  C09K11/02 ,  C09K11/06 ,  C07D209/86 ,  H01L51/50

Abstract: A light-emitting element having a long lifetime is provided. A light-emitting element exhibiting high emission efficiency in a high luminance region is provided. A light-emitting element includes a light-emitting layer between a pair of electrodes. The light-emitting layer contains a first organic compound, a second organic compound, and a phosphorescent compound. The first organic compound is represented by a general formula (G0). The molecular weight of the first organic compound is greater than or equal to 500 and less than or equal to 2000. The second organic compound is a compound having an electron-transport property. In the general formula (G0), Ar1 and Ar2 each independently represent a fluorenyl group, a spirofluorenyl group, or a biphenyl group, and Ar3 represents a substituent including a carbazole skeleton.

公开(公告)号：US20180138416A1

公开(公告)日：2018-05-17

申请号：US15812703

申请日：2017-11-14

Applicant: Semiconductor Energy Laboratory Co., Ltd.

Inventor： Satoshi Seo ,  Tatsuyoshi TAKAHASHI ,  Kyoko TAKEDA ,  Kanta ABE ,  Hiroki SUZUKI

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

CPC classification number: H01L51/0051 ,  C07F15/0033 ,  C09K11/06 ,  G06F3/0412 ,  G06F3/045 ,  H01L27/3267 ,  H01L51/0059 ,  H01L51/0061 ,  H01L51/0067 ,  H01L51/0072 ,  H01L51/0074 ,  H01L51/0085 ,  H01L51/5004 ,  H01L51/5016 ,  H01L51/5028 ,  H01L51/5056 ,  H01L51/5072 ,  H01L2251/5384 ,  H01L2251/552 ,  H05B33/14 ,  H05B33/20

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：US20160343942A1

公开(公告)日：2016-11-24

申请号：US15228557

申请日：2016-08-04

Applicant: Semiconductor Energy Laboratory Co., Ltd.

Inventor： Takao HAMADA ,  Hiromi SEO ,  Kanta ABE ,  Kyoko TAKEDA ,  Satoshi SEO

IPC: H01L51/00 ,  C09K11/02 ,  C07D209/86 ,  C09K11/06

CPC classification number: H01L51/006 ,  C07D209/86 ,  C09K11/025 ,  C09K11/06 ,  C09K2211/1007 ,  C09K2211/1044 ,  C09K2211/185 ,  H01L51/0052 ,  H01L51/0056 ,  H01L51/0058 ,  H01L51/0061 ,  H01L51/0067 ,  H01L51/0072 ,  H01L51/0074 ,  H01L51/0085 ,  H01L51/5016 ,  H01L51/5024 ,  H01L51/5056 ,  H01L51/5072 ,  H01L2251/5384

Abstract: A light-emitting element having a long lifetime is provided. A light-emitting element exhibiting high emission efficiency in a high luminance region is provided. A light-emitting element includes a light-emitting layer between a pair of electrodes. The light-emitting layer contains a first organic compound, a second organic compound, and a phosphorescent compound. The first organic compound is represented by a general formula (G0). The molecular weight of the first organic compound is greater than or equal to 500 and less than or equal to 2000. The second organic compound is a compound having an electron-transport property. In the general formula (G0), Ar1 and Ar2 each independently represent a fluorenyl group, a spirofluorenyl group, or a biphenyl group, and Ar3 represents a substituent including a carbazole skeleton.

Abstract translation: 提供具有长寿命的发光元件。 提供了在高亮度区域表现出高发光效率的发光元件。 发光元件包括在一对电极之间的发光层。 发光层含有第一有机化合物，第二有机化合物和磷光化合物。 第一有机化合物由通式（G0）表示。 第一有机化合物的分子量大于或等于500且小于或等于2000.第二有机化合物是具有电子传输性质的化合物。 在通式（G0）中，Ar 1和Ar 2各自独立地表示芴基，螺芴基或联苯基，Ar 3表示包含咔唑骨架的取代基。