公开(公告)号：US20170018727A1

公开(公告)日：2017-01-19

申请号：US15278379

申请日：2016-09-28

Applicant: Semiconductor Energy Laboratory Co., Ltd.

Inventor： Takeyoshi WATABE ,  Satoshi SEO

IPC: H01L51/50 ,  C09K11/02 ,  C09K11/06

CPC classification number: H01L51/504 ,  C09K11/025 ,  C09K11/06 ,  C09K2211/1007 ,  C09K2211/1044 ,  C09K2211/185 ,  H01L51/0052 ,  H01L51/006 ,  H01L51/0061 ,  H01L51/0072 ,  H01L51/0074 ,  H01L51/0085 ,  H01L51/5004 ,  H01L51/5012 ,  H01L51/5016 ,  H01L51/5036 ,  H01L2251/552

Abstract: Provided is a light-emitting element having a light-emitting layer which contains at least a host material and a plurality of guest materials, where the host material has a lower T1 level than that of at least one of the plurality of guest materials. The emission of the one of the plurality of guest materials exhibits a multicomponent decay curve, and the lifetime thereof is less than or equal to 15 μsec, preferably less than or equal to 10 μsec, more preferably less than or equal to 5 μsec, where the lifetime is defined as a time for the emission to decrease in intensity to 1/100 of its initial intensity.

Abstract translation: 本发明提供一种具有至少含有主体材料和多种客体材料的发光层的发光元件，其中所述主体材料具有比所述多个客体材料中的至少一个客体材料低的T1水平。 多个客体材料中的一个的发射表现出多组分衰变曲线，其寿命小于或等于15微秒，优选小于或等于10微秒，更优选小于或等于5微秒，其中 寿命被定义为发射强度降低到其初始强度的1/100的时间。

公开(公告)号：US20160380223A1

公开(公告)日：2016-12-29

申请号：US15258622

申请日：2016-09-07

Applicant: Semiconductor Energy Laboratory Co., Ltd.

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

IPC: H01L51/50 ,  H01L51/52

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：US20240397742A1

公开(公告)日：2024-11-28

申请号：US18692923

申请日：2022-09-12

Applicant: Semiconductor Energy Laboratory Co., Ltd.

Inventor： Takeyoshi WATABE ,  Nobuharu OHSAWA ,  Satoshi SEO

IPC: H10K50/15 ,  H10K50/16 ,  H10K59/35

Abstract: A light-emitting apparatus with high emission efficiency is provided. The light-emitting apparatus includes light-emitting devices A and B each including an anode, a cathode, and an EL layer. An EL layer A includes a first layer A to a third layer A and a light-emitting layer A. An EL layer B includes a first layer B to a fourth layer B and a light-emitting layer B. The light-emitting layer A includes a light-emitting substance A and the light-emitting layer B includes a light-emitting substance B. An emission peak wavelength (wavelength A) of the light-emitting substance A is shorter than an emission peak wavelength (wavelength B) of the light-emitting substance B. The first layers A and B have similar structures, the second layers A and B have similar structures, and the third layers A and B have similar structures. The ordinary refractive index (no) of each of the first layer A and the third layer A is lower than the no of the second layer A at the wavelength A. The no of each of the first layer B and the third layer B is lower than the no of the second layer B at the wavelength B. The fourth layer B is positioned between the anode B and the first layer B, between the first layer B and the second layer B, between the first layer B and the third layer B, or between the third layer B and the light-emitting layer B.

公开(公告)号：US20240397741A1

公开(公告)日：2024-11-28

申请号：US18791891

申请日：2024-08-01

Applicant: Semiconductor Energy Laboratory Co., Ltd.

Inventor： Shunpei YAMAZAKI ,  Daisuke KUBOTA ,  Nobuharu OHSAWA ,  Takeyoshi WATABE ,  Taisuke KAMADA

IPC: H10K50/13 ,  H10K50/16 ,  H10K50/852 ,  H10K65/00 ,  H10K102/00

Abstract: A display apparatus having a function of emitting visible light and infrared light and a light detection function is provided. The display apparatus includes a first light-emitting device, a second light-emitting device, and a light-receiving device in a display portion. The first light-emitting device emits both visible light and infrared light and the second light-emitting device emits visible light. The light-receiving device has a function of absorbing at least part of visible light and infrared light. The first light-emitting device includes a first pixel electrode, a first light-emitting layer, a second light-emitting layer, and a common electrode. The second light-emitting device includes a second pixel electrode, a third light-emitting layer, and the common electrode. The light-receiving device includes a third pixel electrode, an active layer, and the common electrode. The first light-emitting layer includes a light-emitting material emitting infrared light. The second light-emitting layer and the third light-emitting layer include light-emitting materials emitting visible light with different wavelengths. The active layer includes an organic compound.

公开(公告)号：US20240334725A1

公开(公告)日：2024-10-03

申请号：US18735584

申请日：2024-06-06

Applicant: Semiconductor Energy Laboratory Co., Ltd.

Inventor： Satoko SHITAGAKI ,  Takahiro ISHISONE ,  Satoshi SEO ,  Takeyoshi WATABE

IPC: H10K50/12 ,  H10K50/14 ,  H10K50/16 ,  H10K85/60

CPC classification number: H10K50/121 ,  H10K50/14 ,  H10K50/16 ,  H10K85/615 ,  H10K85/654 ,  H10K85/6572

Abstract: Provided is a light-emitting element which has an anode, a light-emitting layer over the anode, an electron-transport layer over and in contact with the light-emitting layer, an electron-injection layer over and in contact with the electron-transport layer, and a cathode over and in contact with the electron-injection layer. The light-emitting layer has an electron-transport property, and the electron-transport layer includes an anthracene derivative. The light-emitting layer further includes a phosphorescent substance. This device structure allows the formation of a highly efficient blue-emissive light-emitting element even though the phosphorescent substance has higher triplet energy than the anthracene derivative which directly contacts with the light-emitting layer.

公开(公告)号：US20240324377A1

公开(公告)日：2024-09-26

申请号：US18678432

申请日：2024-05-30

Applicant: Semiconductor Energy Laboratory Co., Ltd.

Inventor： Shunpei YAMAZAKI ,  Daisuke KUBOTA ,  Nobuharu OHSAWA ,  Takeyoshi WATABE ,  Taisuke KAMADA

IPC: H10K59/32 ,  H10K50/85 ,  H10K102/00

CPC classification number: H10K59/32 ,  H10K50/85 ,  H10K2102/311

Abstract: A display device that has a function of emitting visible light and infrared light and a function of detecting light. The display device is a display device including a first light-emitting device, a second light-emitting device, and a light-receiving device, in a display portion. The first light-emitting device includes a first pixel electrode, a first optical adjustment layer, a first light-emitting layer, a second light-emitting layer, and a common electrode. The second light-emitting device includes a second pixel electrode, a second optical adjustment layer, the first light-emitting layer, the second light-emitting layer, and the common electrode. The light-receiving device includes a third pixel electrode, an active layer, and the common electrode. The active layer includes an organic compound. The first light-emitting device emits infrared light emitted by the first light-emitting layer. The second light-emitting device emits visible light emitted by the second light-emitting layer. The light-receiving device has a function of absorbing at least part of visible light and infrared light.

公开(公告)号：US20240306411A1

公开(公告)日：2024-09-12

申请号：US18667068

申请日：2024-05-17

Applicant: Semiconductor Energy Laboratory Co., Ltd.

Inventor： Satomi MITSUMORI ,  Takeyoshi WATABE ,  Satoshi SEO ,  Yuko KUBOTA

IPC: H10K50/11 ,  H10K50/15 ,  H10K50/16 ,  H10K50/19 ,  H10K50/852 ,  H10K59/30 ,  H10K59/35 ,  H10K59/38 ,  H10K85/30 ,  H10K101/00 ,  H10K101/10 ,  H10K101/40

CPC classification number: H10K50/11 ,  H10K50/15 ,  H10K50/16 ,  H10K59/38 ,  H10K85/341 ,  H10K85/342 ,  H10K85/344 ,  H10K85/346 ,  H10K85/348 ,  H10K50/19 ,  H10K50/852 ,  H10K59/30 ,  H10K59/35 ,  H10K2101/10 ,  H10K2101/40 ,  H10K2101/90

Abstract: A light-emitting element having low driving voltage and high emission efficiency is provided. In the light-emitting element, a combination of a guest material and a host material forms an exciplex. The guest material is capable of converting triplet excitation energy into light emission. Light emission from the light-emitting layer includes light emission from the guest material and light emission from the exciplex. The percentage of the light emission from the exciplex to the light emission from the light-emitting layer is greater than 0 percent and less than or equal to 60 percent. The energy after subtracting the energy of light emission from the exciplex from the energy of light emission from the guest material is greater than 0 eV and less than or equal to 0.23 eV.

公开(公告)号：US20240237527A1

公开(公告)日：2024-07-11

申请号：US18541411

申请日：2023-12-15

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Takeyoshi WATABE ,  Hideko YOSHIZUMI ,  Nobuharu OHSAWA ,  Hiromi SEO ,  Toshiki SASAKI

IPC: H10K85/60 ,  H10K50/13 ,  H10K50/17 ,  H10K59/131 ,  H10K59/35 ,  H10K85/30

CPC classification number: H10K85/6572 ,  H10K50/131 ,  H10K50/171 ,  H10K59/131 ,  H10K59/352 ,  H10K85/342 ,  H10K85/6576

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, and a first layer. The first unit is positioned between the first electrode and the second electrode and contains a first light-emitting material. The first layer is positioned between the second electrode and the first unit and 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, and the second organic compound has no pyridine ring, no phenanthroline ring, or one phenanthroline ring.

公开(公告)号：US20240224575A1

公开(公告)日：2024-07-04

申请号：US18436886

申请日：2024-02-08

Applicant: Semiconductor Energy Laboratory Co., Ltd.

Inventor： Takeyoshi WATABE ,  Airi Ueda ,  Nobuharu Ohsawa ,  Satoshi Seo

IPC: H10K50/19 ,  G06V40/13 ,  H10K50/818 ,  H10K50/828 ,  H10K50/852 ,  H10K71/00 ,  H10K85/30 ,  H10K102/00

CPC classification number: H10K50/19 ,  H10K50/852 ,  H10K85/342 ,  G06V40/1318 ,  H10K50/818 ,  H10K50/828 ,  H10K71/00 ,  H10K2102/351

Abstract: A light-emitting device is provided. The light-emitting device includes an intermediate layer, a first light-emitting unit, and a second light-emitting unit. The intermediate layer includes a region interposed between the first light-emitting unit and the second light-emitting unit. The intermediate layer has a function of supplying an electron to one of the first light-emitting unit and the second light-emitting unit and supplying a hole to the other. The first light-emitting unit includes a first light-emitting layer, the first light-emitting layer includes a first light-emitting material, the second light-emitting unit includes a second light-emitting layer, the second light-emitting layer includes a second light-emitting material, the second light-emitting layer has a first distance from the first light-emitting layer, and the first distance is longer than or equal to 5 nm and shorter than or equal to 65 nm.

公开(公告)号：US20240206220A1

公开(公告)日：2024-06-20

申请号：US18521306

申请日：2023-11-28

Applicant: Semiconductor Energy Laboratory Co., Ltd.

Inventor： Takeyoshi WATABE ,  Nobuharu Ohsawa ,  Hiromi Seo

IPC: H10K50/16 ,  H10K50/19

CPC classification number: H10K50/16 ,  H10K50/19 ,  H10K2101/30

Abstract: A tandem light-emitting device that can be used in a high-resolution display apparatus is provided. The light-emitting device includes a first electrode, a second electrode, and an organic compound layer. The organic compound layer is positioned between the first electrode and the second electrode; the organic compound layer includes a first light-emitting unit, a second light-emitting unit, and an intermediate layer; the intermediate layer is positioned between the first light-emitting unit and the second light-emitting unit; the first light-emitting unit is positioned between the first electrode and the intermediate layer; the first light-emitting unit includes a first light-emitting layer and a first electron-transport layer; the first electron-transport layer is in contact with the intermediate layer; the intermediate layer is configured to block holes moving from the first electrode side to the second electrode side; and the first electron-transport layer is a layer having a bipolar property.