公开(公告)号：US20210336176A1

公开(公告)日：2021-10-28

申请号：US17237262

申请日：2021-04-22

Applicant: Semiconductor Energy Laboratory Co., Ltd.

Inventor： Yuta KAWANO ,  Airi UEDA ,  Takeyoshi WATABE ,  Nobuharu OHSAWA ,  Keito TOSU ,  Harue OSAKA ,  Satoshi SEO ,  Ryo NARUKAWA ,  Shiho NOMURA

IPC: H01L51/50 ,  H01L27/32

Abstract: A light-emitting device with high emission efficiency 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 light-emitting layer and an electron-transport layer; the light-emitting layer includes a light-emitting material; the electron-transport layer includes an organic compound having an electron-transport property and a metal complex of an alkali metal; the ordinary refractive index of the organic compound having an electron-transport property in a peak wavelength of light emitted from the light-emitting material is greater than or equal to 1.50 and less than or equal to 1.75; and the ordinary refractive index of the metal complex of an alkali metal in the peak wavelength of the light emitted from the light-emitting material is greater than or equal to 1.45 and less than or equal to 1.70.

公开(公告)号：US20230097840A1

公开(公告)日：2023-03-30

申请号：US17801585

申请日：2021-02-15

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Shiho NOMURA ,  Satoshi SEO ,  Tsunenori SUZUKI ,  Shogo UESAKA

IPC: H01L51/50

Abstract: A novel light-emitting device that is highly convenient, useful, or reliable is provided. The light-emitting device includes a first electrode, a second electrode, a unit, and a first layer. The second electrode includes a region overlapping with the first electrode. The unit includes a region positioned between the first electrode and the second electrode. The unit includes a second layer and a third layer. The second layer includes a region where the third layer is positioned between the second layer and the first electrode. The second layer contains a light-emitting material. The first layer includes a region positioned between the third layer and the first electrode. The first layer contains a material having an acceptor property and a first material. The first layer includes a first region and a second region. The first region includes a region positioned between the second region and the first electrode. The first region contains the material having an acceptor property at a first concentration. The second region contains the material having an acceptor property at a second concentration. Note that the second concentration is higher than zero and lower than the first concentration.

公开(公告)号：US20210234115A1

公开(公告)日：2021-07-29

申请号：US17055933

申请日：2019-05-10

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Satoshi SEO ,  Toshiki SASAKI ,  Ryohei YAMAOKA ,  Shiho NOMURA

IPC: H01L51/50 ,  H01L51/52

Abstract: A novel light-emitting device with high emission efficiency is provided. A light-emitting device with a high blue index (BI) is provided. A light-emitting device with low power consumption is provided. A light-emitting device including a first electrode and a second electrode which are a reflective electrode and a semi-transmissive and semi-reflective electrode, and an EL layer sandwiched between the first electrode and the second electrode, where the EL layer contains an emission center substance, where when the emission center substance in the EL layer includes only one kind of substance, photon energy of a peak wavelength of light emitted from the light-emitting device is designed from an average value of photon energy of light emitted by the emission center substance in a solution state and emission edge energy on a short wavelength side of an emission spectrum of the emission center substance in the solution state.

公开(公告)号：US20240292642A1

公开(公告)日：2024-08-29

申请号：US18586676

申请日：2024-02-26

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Satoshi SEO ,  Toshiki SASAKI ,  Ryohei YAMAOKA ,  Shiho NOMURA

IPC: H10K50/11 ,  H10K50/818 ,  H10K50/828

CPC classification number: H10K50/11 ,  H10K50/818 ,  H10K50/828

Abstract: Alight-emitting device with high emission efficiency is provided. Alight-emitting device with a high blue index (BI) is provided. A light-emitting device with low power consumption is provided. A light-emitting device including a first electrode and a second electrode which are a reflective electrode and a semi-transmissive and semi-reflective electrode, and an EL layer sandwiched between the first electrode and the second electrode, where the EL layer contains an emission center substance, where when the emission center substance in the EL layer includes only one kind of substance, photon energy of a peak wavelength of light emitted from the light-emitting device is designed from an average value of photon energy of light emitted by the emission center substance in a solution state and emission edge energy on a short wavelength side of an emission spectrum of the emission center substance in the solution state.

公开(公告)号：US20240164134A1

公开(公告)日：2024-05-16

申请号：US18423895

申请日：2024-01-26

Applicant: Semiconductor Energy Laboratory Co., Ltd.

Inventor： Yuta KAWANO ,  Airi UEDA ,  Takeyoshi WATABE ,  Nobuharu OHSAWA ,  Keito TOSU ,  Harue OSAKA ,  Satoshi SEO ,  Ryo NARUKAWA ,  Shiho NOMURA

IPC: H10K50/16 ,  H10K59/00 ,  H10K59/12

CPC classification number: H10K50/16 ,  H10K59/00 ,  H10K59/12 ,  H10K85/631

Abstract: A light-emitting device with high emission efficiency 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 light-emitting layer and an electron-transport layer; the light-emitting layer includes a light-emitting material; the electron-transport layer includes an organic compound having an electron-transport property and a metal complex of an alkali metal; the ordinary refractive index of the organic compound having an electron-transport property in a peak wavelength of light emitted from the light-emitting material is greater than or equal to 1.50 and less than or equal to 1.75; and the ordinary refractive index of the metal complex of an alkali metal in the peak wavelength of the light emitted from the light-emitting material is greater than or equal to 1.45 and less than or equal to 1.70.

公开(公告)号：US20230093163A1

公开(公告)日：2023-03-23

申请号：US17814280

申请日：2022-07-22

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Takuya HARUYAMA ,  Sachiko KAWAKAMI ,  Tsunenori SUZUKI ,  Naoaki HASHIMOTO ,  Shiho NOMURA

IPC: C07C15/28 ,  H01L51/50 ,  C07F7/08 ,  C07C13/615 ,  H01L51/00

Abstract: A novel organic compound that is highly convenient, useful, or reliable is provided. The organic compound is represented by General Formula (G1). Note that at least one of R1 to R26 represents deuterium. At least one of R1 to R7 represents any one of an alkyl group, a cycloalkyl group, a trialkylsilyl group, and an aryl group. The others of R1 to R7 each independently represent any one of hydrogen, an alkyl group, a cycloalkyl group, a trialkylsilyl group, and an aryl group. R8 to R26 each independently represent any one of hydrogen, an alkyl group, a cycloalkyl group, a trialkylsilyl group, and an aryl group. The alkyl group has 3 to 10 carbon atoms, the cycloalkyl group has 3 to 10 carbon atoms, the trialkylsilyl group has 3 to 12 carbon atoms, and the aryl group has 6 to 25 carbon atoms.

公开(公告)号：US20210313520A1

公开(公告)日：2021-10-07

申请号：US17264909

申请日：2019-07-25

Applicant: Semiconductor Energy Laboratory Co., Ltd.

Inventor： Satoshi Seo ,  Toshiki SASAKI ,  Shogo UESAKA ,  Shiho NOMURA

IPC: H01L51/00 ,  C07D491/048 ,  C07D519/00

Abstract: Provided is a light-emitting device that can have sufficient device characteristics even with a smaller number of stacked layers in an EL layer and a thicker light-emitting layer than a conventional one by using, as an organic compound used for the EL layer of the light-emitting device, a material that can increase not only a property of carrier transport to the light-emitting layer but also a property of carrier injection from an electrode.