公开(公告)号：US20160190500A1

公开(公告)日：2016-06-30

申请号：US14978034

申请日：2015-12-22

Applicant: Semiconductor Energy Laboratory Co., Ltd.

Inventor： Takeyoshi WATABE ,  Toshiki SASAKI ,  Satoshi SEO

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

CPC classification number: H01L51/5265 ,  C07F15/0033 ,  C09K11/06 ,  H01L27/323 ,  H01L51/0059 ,  H01L51/006 ,  H01L51/0072 ,  H01L51/0074 ,  H01L51/0085 ,  H01L51/5016 ,  H01L2251/5384

Abstract: A light-emitting element that emits light with high color purity, a light-emitting element that emits light at high emission efficiency, or a light-emitting element with reduced power consumption. The light-emitting element includes a first electrode, a second electrode, and an EL layer. The first electrode is configured to reflect light. The second electrode is configured to reflect light and transmit light. The EL layer is between the first electrode and the second electrode. The EL layer includes a guest material. The guest material is configured to convert triplet excitation energy into light emission. The emission spectrum of the guest material in a dichloromethane solution has a peak in a wavelength region ranging from 440 nm to 470 nm and has a full width at half maximum of greater than or equal to 20 nm and less than or equal to 80 nm.

Abstract translation: 以高纯度发出光的发光元件，以高发光效率发光的发光元件或功耗降低的发光元件。 发光元件包括第一电极，第二电极和EL层。 第一电极被配置为反射光。 第二电极被配置为反射光并透射光。 EL层位于第一电极和第二电极之间。 EL层包括客体材料。 客体材料被配置为将三重态激发能转换成发光。 客体材料在二氯甲烷溶液中的发射光谱在440nm至470nm的波长范围内具有峰值，并具有大于或等于20nm且小于或等于80nm的半峰全宽。

公开(公告)号：US20140339522A1

公开(公告)日：2014-11-20

申请号：US14276621

申请日：2014-05-13

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Yusuke NONAKA ,  Satoshi SEO ,  Harue OSAKA ,  Tsunenori SUZUKI ,  Takeyoshi WATABE

IPC: H01L51/50

CPC classification number: H01L51/5012 ,  H01L51/0052 ,  H01L51/0054 ,  H01L51/0058 ,  H01L51/006 ,  H01L51/0067 ,  H01L51/0085 ,  H01L51/5004 ,  H01L51/5016 ,  H01L51/5056 ,  H01L51/5278 ,  H01L2251/552

Abstract: To increase emission efficiency of a fluorescent light-emitting element by efficiently utilizing a triplet exciton generated in a light-emitting layer. The light-emitting layer of the light-emitting element includes at least a host material and a guest material. The triplet exciton generated from the host material in the light-emitting layer is changed to a singlet exciton by triplet-triplet annihilation (TTA). The guest material (fluorescent dopant) is made to emit light by energy transfer from the singlet exciton. Thus, the emission efficiency of the light-emitting element is improved.

Abstract translation: 通过有效地利用在发光层中产生的三线态激子来提高荧光发光元件的发光效率。 发光元件的发光层至少包含主体材料和客体材料。 从发光层中的主体材料产生的三线态激子通过三重态三重态湮灭（TTA）改变为单线态。 客体材料（荧光掺杂剂）通过从单线态激子的能量转移而发光。 因此，发光元件的发光效率提高。

公开(公告)号：US20240349531A1

公开(公告)日：2024-10-17

申请号：US18700081

申请日：2022-10-03

Applicant: Semiconductor Energy Laboratory Co., Ltd.

Inventor： Takeyoshi WATABE ,  Nobuharu OHSAWA ,  Satoshi SEO

IPC: H10K50/858 ,  H10K50/13 ,  H10K50/17 ,  H10K59/80 ,  H10K102/00

CPC classification number: H10K50/858 ,  H10K50/13 ,  H10K50/17 ,  H10K50/171 ,  H10K59/879 ,  H10K2102/351

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 first layer, a second layer, and a third layer. The first layer is interposed between the first electrode and the second electrode. The second layer is interposed between the second electrode and the first layer. The third layer is interposed between the second layer and the first layer. The first layer contains a first light-emitting material. The first light-emitting material has an emission spectrum having a peak at a wavelength λ1. The first layer has an ordinary refractive index n1 at the wavelength λ1. The second layer contains a second light-emitting material. The second light-emitting material has an emission spectrum having a peak at a wavelength λ2. The second layer has an ordinary refractive index n2 at the wavelength λ2. The third layer has an ordinary refractive index n31 which is lower than the ordinary refractive index n1 at the wavelength λ1. The third layer has an ordinary refractive index n32 which is lower than the ordinary refractive index n2 at the wavelength λ2.

公开(公告)号：US20240341166A1

公开(公告)日：2024-10-10

申请号：US18750384

申请日：2024-06-21

Applicant: Semiconductor Energy Laboratory Co., Ltd.

Inventor： Takeyoshi WATABE ,  Satoshi SEO

IPC: H10K85/30 ,  C07F15/00 ,  C09K11/06 ,  H10K30/00 ,  H10K50/11 ,  H10K50/16 ,  H10K50/17 ,  H10K50/84 ,  H10K59/12 ,  H10K59/38 ,  H10K59/40 ,  H10K71/00 ,  H10K71/16 ,  H10K85/60 ,  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：US20240206225A1

公开(公告)日：2024-06-20

申请号：US18515345

申请日：2023-11-21

Applicant: Semiconductor Energy Laboratory Co., Ltd.

Inventor： Takeyoshi WATABE ,  Hideko YOSHIZUMI ,  Nobuharu OHSAWA

IPC: H10K59/12 ,  H10K59/80 ,  H10K85/20

CPC classification number: H10K59/1201 ,  H10K59/805 ,  H10K85/20

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 first unit, a second unit, and a first intermediate layer. The first unit is between the first electrode and the second electrode. The first unit contains a first light-emitting material. The second unit is between the first unit and the second electrode. The second unit contains a second light-emitting material. The first intermediate layer is between the first unit and the second unit. The first intermediate layer contains a first organic compound and a second organic compound. The first organic compound has an acid dissociation constant pKa larger than or equal to 8. The second organic compound has an acid dissociation constant pKa smaller than 4.

公开(公告)号：US20240008352A1

公开(公告)日：2024-01-04

申请号：US18343102

申请日：2023-06-28

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Takeyoshi WATABE ,  Nobuharu OHSAWA

IPC: H10K71/20

CPC classification number: H10K71/233 ,  H10K2101/30

Abstract: An electronic device or a light-emitting device with high design flexibility and favorable reliability is provided by the following steps. A light-emitting layer containing a first organic compound and a second organic compound is formed over a substrate provided with a first electrode, the substrate is held under lighting of a light source whose shortest-wavelength emission edge among emission edges in an emission spectrum is positioned at a wavelength shorter than a wavelength of the longest-wavelength absorption edge among absorption edges in an absorption spectrum of the first organic compound and at a wavelength longer than a wavelength of the longest-wavelength absorption edge among absorption edges in an absorption spectrum of the second organic compound, a sacrificial layer is formed over the light-emitting layer, at least the light-emitting layer is processed into an island shape by a photolithography method, and a second electrode is formed over the light-emitting layer.

公开(公告)号：US20230422598A1

公开(公告)日：2023-12-28

申请号：US18367514

申请日：2023-09-13

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Takeyoshi WATABE ,  Satoshi SEO ,  Satomi MITSUMORI

IPC: H10K85/30 ,  C09K11/02 ,  C09K11/06 ,  C07F15/00 ,  G06F3/044 ,  H05B33/14 ,  G09G3/3225 ,  H10K50/11 ,  H10K50/12

CPC classification number: H10K85/342 ,  C09K11/025 ,  C09K11/06 ,  C07F15/0033 ,  G06F3/044 ,  H05B33/14 ,  G09G3/3225 ,  H10K50/11 ,  H10K50/121 ,  C09K2211/1007 ,  C09K2211/1059 ,  C09K2211/185 ,  G09G2300/0452 ,  G09G2310/0267 ,  G09G2310/0272 ,  G09G2310/08 ,  G09G2330/021 ,  G06F3/0416

Abstract: To provide a light-emitting element with high emission efficiency and low driving voltage. The light-emitting element includes a guest material and a host material. A LUMO level of the host material is higher than a LUMO level of the host material, and a HOMO level of the guest material is lower than a HOMO level of the host material. The guest material has a function of converting triplet excitation energy into light emission. The difference between a singlet excitation energy level and a triplet excitation energy level of the host material is greater than 0 eV and less than or equal to 0.2 eV. The energy difference between the LUMO level and the HOMO level of the host material is larger than or equal to light emission energy of the guest material.

公开(公告)号：US20230348400A1

公开(公告)日：2023-11-02

申请号：US18305609

申请日：2023-04-24

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Takuya HARUYAMA ,  Sachiko KAWAKAMI ,  Yui YOSHIYASU ,  Nobuharu OHSAWA ,  Takeyoshi WATABE ,  Hideko YOSHIZUMI

IPC: C07F1/08 ,  H10K85/30 ,  C07F7/08 ,  C07D239/70 ,  C07F15/00 ,  H10K85/60 ,  H10K85/40

CPC classification number: C07D239/70 ,  C07F1/08 ,  C07F7/0812 ,  C07F15/0033 ,  H10K85/342 ,  H10K85/371 ,  H10K85/40 ,  H10K85/633 ,  H10K85/655 ,  C07B2200/05

Abstract: A novel organic compound is provided. The organic compound is represented by General Formula (G1). In General Formula (G1), R1 to R16 each independently represent any one of hydrogen (including deuterium), a substituted or unsubstituted straight-chain alkyl group having 1 to 10 carbon atoms, a substituted or unsubstituted branched alkyl group having 3 to 10 carbon atoms, a substituted or unsubstituted alkoxy group having 1 to 10 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 12 carbon atoms, a substituted or unsubstituted cycloalkyl group having 4 to 10 carbon atoms and having a bridged structure, a trialkylsilyl group having 3 to 12 carbon atoms, a substituted or unsubstituted aryl group having 6 to 30 carbon atoms, and a substituted or unsubstituted heteroaryl group having 3 to 30 carbon atoms; at least one of R1 to R16 represents a substituent represented by General Formula (g1-1); and one or more, preferably two or more of R1 to R16 in General Formula (G1) represent substituents other than hydrogen (including deuterium) and the substituent represented by General Formula (g1-1).

公开(公告)号：US20230329083A1

公开(公告)日：2023-10-12

申请号：US18025112

申请日：2021-08-30

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Yui YOSHIYASU ,  Masatoshi TAKABATAKE ,  Hideko YOSHIZUMI ,  Yuta KAWANO ,  Takeyoshi WATABE ,  Satoshi SEO

IPC: H10K85/30 ,  C07F15/00 ,  C09K11/06

CPC classification number: H10K85/342 ,  C07F15/0033 ,  C09K11/06 ,  H10K50/11

Abstract: A novel organometallic complex with high heat resistance is provided. The organometallic complex includes a structure represented by General Formula (G1) below, in which iridium and a ligand are included, the ligand includes a pyrazine skeleton, iridium is bonded to nitrogen at the 1-position of the pyrazine skeleton, an aryl group including a cyano group as a substituent is bonded at the 5-position of the pyrazine skeleton, and each of the 3-position and the 6-position of the pyrazine skeleton is independently bonded to any one of hydrogen, an alkyl group, and an alkoxy group.




(In the formula, A represents a substituted or unsubstituted aromatic hydrocarbon group having 6 to 25 carbon atoms. In addition, Ar represents an aryl group having 6 to 25 carbon atoms and at least one cyano group as a substituent. Each of R1 and R2 independently represents any one of hydrogen, an alkyl group having 1 to 6 carbon atoms, and an alkoxy group having 1 to 6 carbon atoms.)

公开(公告)号：US20230276700A1

公开(公告)日：2023-08-31

申请号：US18020490

申请日：2021-07-29

Applicant: Semiconductor Energy Laboratory Co., Ltd.

Inventor： Yuta Kawano ,  Airi UEDA ,  Takeyoshi WATABE ,  Nobuharu OHSAWA ,  Keito TOSU ,  Harue OSAKA ,  Satoshi SEO

IPC: H10K85/60 ,  H10K50/858 ,  H10K71/13 ,  C07D251/24 ,  C09K11/06

CPC classification number: H10K85/654 ,  H10K50/858 ,  H10K71/135 ,  C07D251/24 ,  C09K11/06 ,  H10K50/15

Abstract: An inexpensive light-emitting device with high emission efficiency is provided. A light-emitting device including an anode, a cathode, and an EL layer positioned between the anode and the cathode is provided. The EL layer includes a hole-transport region, a light-emitting layer, and an electron-transport region. The hole-transport region is positioned between the anode and the light-emitting layer. The electron-transport region is positioned between the cathode and the light-emitting layer. The hole-transport region contains a heteropoly acid and an organic compound having a π-electron rich aromatic ring or contains a heteropoly acid and an organic compound having a π-electron rich heteroaromatic ring. The electron-transport region contains an organic compound with an electron-transport property. The ordinary refractive index of the organic compound with an electron-transport property is higher than or equal to 1.50 and lower than or equal to 1.75 for light with a wavelength of greater than or equal to 455 nm and less than or equal to 465 nm.