公开(公告)号：US12029056B2

公开(公告)日：2024-07-02

申请号：US17431246

申请日：2020-02-14

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Shunpei Yamazaki ,  Satoshi Seo ,  Harue Osaka

IPC: H10K50/11 ,  H10K50/15 ,  H10K50/16 ,  H10K50/17 ,  H10K59/12 ,  H10K71/00 ,  H10K71/13 ,  H10K85/30 ,  H10K85/60 ,  H10K101/10 ,  H10K101/30 ,  H10K101/40

CPC classification number: H10K50/11 ,  H10K50/15 ,  H10K50/16 ,  H10K50/17 ,  H10K59/12 ,  H10K71/00 ,  H10K71/135 ,  H10K85/30 ,  H10K85/342 ,  H10K85/615 ,  H10K85/626 ,  H10K85/633 ,  H10K85/636 ,  H10K85/657 ,  H10K85/6572 ,  H10K85/6574 ,  H10K85/6576 ,  H10K2101/10 ,  H10K2101/30 ,  H10K2101/40

Abstract: A display device having a long lifetime is provided. A large-sized display device is provided. A display device includes a first light-emitting device and a second light-emitting device. The first light-emitting device includes a hole-injection layer, a first light-emitting layer, and an electron-transport layer. The second light-emitting device includes a second light-emitting layer. The hole-injection layer contains a first compound and a second compound. The first light-emitting layer contains a third compound that emits light of a first color. The second light-emitting layer contains a fourth compound that emits light of a second color. The electron-transport layer contains a fifth compound. The first compound has a property of accepting electrons from the second compound. The second compound has a HOMO level higher than or equal to −5.7 eV and lower than or equal to −5.4 eV. The fifth compound has a HOMO level higher than or equal to −6.0 eV and an electron mobility higher than or equal to 1×10{circumflex over ( )}−7 cm{circumflex over ( )}/Vs and lower than or equal to 5×10{circumflex over ( )}−5 cm{circumflex over ( )}/Vs when the square root of electric field strength [V/cm] is 600.

公开(公告)号：US11917908B2

公开(公告)日：2024-02-27

申请号：US17116222

申请日：2020-12-09

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Kyoko Takeda ,  Harue Osaka ,  Hiroshi Kadoma ,  Satoshi Seo ,  Tsunenori Suzuki ,  Naoaki Hashimoto

IPC: H01L51/00 ,  C07D493/04 ,  C09K11/06 ,  C07D209/88 ,  C07D405/12 ,  H10K85/60 ,  H10K50/11

CPC classification number: H10K85/636 ,  C07D209/88 ,  C07D405/12 ,  C07D493/04 ,  C09K11/06 ,  H10K85/633 ,  C09K2211/1022 ,  H10K50/11 ,  H10K85/615 ,  H10K85/622 ,  H10K85/6572 ,  H10K85/6574

Abstract: A novel organic compound represented by General Formula (G1) is provided. In General Formula (G1), X1 and X2 each independently represent a secondary or tertiary alkyl group having 3 to 6 carbon atoms and having a branched carbon atom which is bonded to a phenyl group. In addition, Ar1 represents a substituted or unsubstituted condensed aromatic ring skeleton having 10 to 60 carbon atoms and composed of two or more rings or a substituted or unsubstituted condensed heteroaromatic ring skeleton having 8 to 60 carbon atoms and composed of two or more rings. Furthermore, Ar2 represents a substituted or unsubstituted aryl group having 6 to 25 carbon atoms. Moreover, n represents any of 1 to 3, and in the case where n is 2 or more, two or more groups bonded to Ar1 may be identical or different.

公开(公告)号：US20240026217A1

公开(公告)日：2024-01-25

申请号：US18374278

申请日：2023-09-28

Applicant: Semiconductor Energy Laboratory Co., Ltd.

Inventor： Kyoko Takeda ,  Harue Osaka ,  Satoko Shitagaki ,  Nobuharu Ohsawa ,  Satoshi Seo ,  Hiromi Seo

IPC: C09K11/06 ,  H10K85/60

CPC classification number: C09K11/06 ,  H10K85/626 ,  H10K85/654 ,  C09K2211/1007 ,  C09K2211/1011 ,  C09K2211/1044 ,  C09K2211/1088 ,  C09K2211/1092 ,  C09K2211/1096 ,  C09K2211/185 ,  H10K50/11

Abstract: A light-emitting element includes an EL layer between a pair of electrodes. The EL layer contains a first compound and a second compound. The first compound is a phosphorescent iridium metal complex having a LUMO level of greater than or equal to −3.5 eV and less than or equal to −2.5 eV, and the second compound is an organic compound having a pyrimidine skeleton. The light-emitting element includes an EL layer between a pair of electrodes. The EL layer contains a first compound and a second compound. The first compound is a phosphorescent iridium metal complex having a diazine skeleton, and the second compound is an organic compound having a pyrimidine skeleton.

公开(公告)号：US11659758B2

公开(公告)日：2023-05-23

申请号：US16914530

申请日：2020-06-29

Applicant: Semiconductor Energy Laboratory Co., Ltd.

Inventor： Taisuke Kamada ,  Ryo Hatsumi ,  Daisuke Kubota ,  Naoaki Hashimoto ,  Tsunenori Suzuki ,  Harue Osaka ,  Satoshi Seo

IPC: H01L27/28 ,  H01L27/30 ,  H01L27/32 ,  H01L51/50 ,  H01L51/52

CPC classification number: H01L27/288 ,  H01L27/307 ,  H01L27/323 ,  H01L27/3244 ,  H01L51/5072 ,  H01L51/5088 ,  H01L51/5284 ,  H01L2251/552

Abstract: An object is to provide a highly reliable display unit having a function of sensing light. The display unit includes a light-receiving device and a light-emitting device. The light-receiving device includes an active layer between a pair of electrodes. The light-emitting device includes a hole-injection layer, a light-emitting layer, and an electron-transport layer between a pair of electrodes. The light-receiving device and the light-emitting device share one of the electrodes, and may further share another common layer between the pair of electrodes. The hole-injection layer is in contact with an anode and contains a first compound and a second compound. The electron-transport property of the electron-transport layer is low; hence, the light-emitting layer is less likely to have excess electrons. Here, the first compound is the material having a property of accepting electrons from the second compound.

公开(公告)号：US11508912B2

公开(公告)日：2022-11-22

申请号：US17178443

申请日：2021-02-18

Applicant: Semiconductor Energy Laboratory Co., Ltd.

Inventor： Shunpei Yamazaki ,  Satoshi Seo ,  Nobuharu Ohsawa ,  Satoko Shitagaki ,  Hideko Inoue ,  Hiroshi Kadoma ,  Harue Osaka ,  Kunihiko Suzuki ,  Yasuhiko Takemura

IPC: H01L51/00

Abstract: A light-emitting element includes a light-emitting layer including a guest, an n-type host and a p-type host between a pair of electrodes, where the difference between the energy difference between a triplet excited state and a ground state of the n-type host (or p-type host) and the energy difference between a triplet excited state and a ground state of the guest is 0.15 eV or more. Alternatively, in such a light-emitting element, the LUMO level of the n-type host is higher than the LUMO level of the guest by 0.1 eV or more, or the HOMO level of the p-type host is lower than the HOMO level of the guest by 0.1 eV or more.

公开(公告)号：US11177325B2

公开(公告)日：2021-11-16

申请号：US16139126

申请日：2018-09-24

Applicant: Semiconductor Energy Laboratory Co., Ltd.

Inventor： Takeyoshi Watabe ,  Satomi Mitsumori ,  Nobuharu Ohsawa ,  Harue Osaka ,  Kunihiko Suzuki ,  Satoshi Seo

IPC: H01L51/50 ,  H01L27/32 ,  H01L51/00

Abstract: Providing a light-emitting element emitting light in a broad emission spectrum. A combination of a first organic compound and a second organic compound forms an exciplex. The first organic compound has a function of converting triplet-excitation energy into light emission. The lowest triplet excitation level of the second organic compound is higher than or equal to the lowest triplet excitation level of the first organic compound, and the lowest triplet excitation level of the first organic compound is higher than or equal to the lowest triplet excitation level of the exciplex. Light emission from a light-emitting layer includes light emission from the first organic compound and light emission from the exciplex.

公开(公告)号：US11063225B2

公开(公告)日：2021-07-13

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 ,  H01L51/50

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：US10930855B2

公开(公告)日：2021-02-23

申请号：US15779661

申请日：2016-12-06

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Yusuke Takita ,  Satoshi Seo ,  Tsunenori Suzuki ,  Harue Osaka

IPC: C07D333/50 ,  H01L51/00 ,  C07D333/76 ,  C09K11/06 ,  H05B45/00 ,  H05B47/11 ,  H01L51/50

Abstract: An object is to provide a light-emitting element with a favorable lifetime.
A light-emitting element which includes a first electrode, a second electrode, and an EL layer and in which the EL layer includes a hole-injection layer and first to fourth layers; the hole-injection layer includes an organic acceptor and is positioned between the first electrode and the first layer; the first layer includes a first hole-transport material; the second layer includes a second hole-transport material and is positioned between the first layer and the third layer; the third layer includes a third hole-transport material; the fourth layer includes a host material and a light-emitting material and is positioned between the third layer and the second electrode; the HOMO level of the second hole-transport material is deeper than the HOMO level of the first hole-transport material; the HOMO level of the host material is deeper than the second hole-transport material HOMO level; the HOMO level of the third hole-transport material is deeper than or equal to the HOMO level of the host material; a difference between the HOMO level of the second hole-transport material and the HOMO level of the third hole-transport material is less than or equal to 0.3 eV; and the second hole-transport material is a triarylamine compound having a structure where a dibenzofuran skeleton or a dibenzothiophene skeleton is bonded to nitrogen of an amine directly or via a divalent aromatic hydrocarbon group.

公开(公告)号：US20210036226A1

公开(公告)日：2021-02-04

申请号：US17065762

申请日：2020-10-08

Applicant: Semiconductor Energy Laboratory Co., Ltd.

Inventor： Harue Osaka ,  Takahiro USHIKUBO ,  Nobuharu OSHAWA ,  Satoshi SEO ,  Tsunenori SUZUKI

IPC: H01L51/00 ,  H05B33/14 ,  C07C211/54 ,  C09K11/06 ,  C09K11/02

Abstract: A triarylamine derivative represented by a general formula (G1) given below is provided. Note that in the formula, Ar represents either a substituted or unsubstituted phenyl group or a substituted or unsubstituted biphenyl group; α represents a substituted or unsubstituted naphthyl group; β represents either hydrogen or a substituted or unsubstituted naphthyl group; n and m each independently represent 1 or 2; and R1 to R8 each independently represent any of hydrogen, an alkyl group having 1 to 6 carbon atoms, or a phenyl group.

公开(公告)号：US10862042B2

公开(公告)日：2020-12-08

申请号：US16699991

申请日：2019-12-02

Applicant: Semiconductor Energy Laboratory Co., Ltd.

Inventor： Harue Osaka ,  Satoko Shitagaki ,  Tsunenori Suzuki ,  Nobuharu Ohsawa ,  Sachiko Kawakami ,  Satoshi Seo

IPC: C09B57/00 ,  H01L51/00 ,  H05B33/14 ,  H05B33/20 ,  C07C211/54 ,  C07C209/10 ,  H01L51/50

Abstract: An object is to provide a light-emitting element having high light-emission efficiency by provision of a novel fluorene derivative as represented by General Formula (G1) below In the formula, R1 to R8 independently represent any of a hydrogen atom, an alkyl group having 1 to 6 carbon atoms, a substituted or unsubstituted phenyl group, or a substituted or unsubstituted biphenyl group. Further, α1 to α4 independently represent any of a substituted or unsubstituted arylene group having 6 to 12 carbon atoms. Furthermore, Ar1 and Ar2 independently represent any of an aryl group having 6 to 13 carbon atoms in a ring and Ar3 represents an alkyl group having 1 to 6 carbon atoms or a substituted or unsubstituted aryl group having 6 to 12 carbon atoms. J, k, m, and n each independently represent 0 or 1.