Semiconductor Energy Laboratory Co., Ltd.

Hiroshi Kadoma

Satoshi Seo

Nobuharu Ohsawa

Satoko Shitagaki

Harue Osaka

Tsunenori Suzuki

Shunpei Yamazaki

Yuko Kawata

Sachiko Kawakami

Hideko Inoue

Teppei Oguni

Hiroko Nomura

Kaori Ogita

Kunihiko Suzuki

Takahiro Ushikubo

Naoaki Hashimoto

Yasushi Kitano

Yasuhiko Takemura

Hiromi Nowatari

Takako Takasu

Yusuke Takita

Tatsuyoshi Takahashi

Yohei Momma

Kyoko Takeda

Hiromi Seo

Hiroki Suzuki

Yoshihiro Komatsu

Takumu Okuyama

Tomoya Hirose

Shiori Saga

Yuji Iwaki

Minoru Takahashi

Mayumi Mikami

Yumiko Yoneda

Takao Hamada

Satomi Mitsumori

A secondary battery with excellent cycle performance is provided. The secondary battery is an all-solid-state battery including a positive electrode current collector layer, a base film, a positive electrode active material layer, a buffer layer, and a solid electrolyte layer. The base film contains titanium nitride. The positive electrode active material layer contains lithium cobalt oxide. The buffer layer contains titanium oxide. The solid electrolyte layer contains a titanium compound. By using titanium oxide for the buffer layer, a side reaction between the positive electrode active material layer and the solid electrolyte layer can be suppressed, and cycle performance can be improved.

Secondary battery and manufacturing method thereof

To provide a storage battery including a carbon-based material. To provide a graphene compound film having desired ion conductivity and mechanical strength while preventing direct contact between electrodes in a storage battery. To achieve long-term reliability. A lithium-ion storage battery includes a positive electrode, a negative electrode, an exterior body, and a separator between the positive electrode and the negative electrode. In the lithium-ion storage battery, one of the positive electrode and the negative electrode is wrapped in a first film, and the positive electrode, the negative electrode, and the separator are stored in the exterior body. The first film may include a first region in which the first film includes a first functional group. The first film may further include a second region in which the first film includes a second functional group different from the first functional group. The first film may be a graphene compound film.

Lithium-ion storage battery and electronic device

A light-emitting device including an EL layer including a hole-injection layer, a light-emitting layer, and an electron-transport layer from an anode side is provided. The hole-injection layer includes a first substance and a second substance. The light-emitting layer includes a third substance and a fourth substance. The electron-transport layer includes a first electron-transport layer and a second electron-transport layer. The first electron-transport layer includes a fifth substance. A first LUMO level of the fifth substance is lower than a second LUMO level of the fourth substance and a difference between the first LUMO level and the second LUMO level is greater than or equal to 0.15 eV and less than or equal to 0.40 eV.

Light-emitting device, light-emitting apparatus, electronic device, and lighting device

A novel electrode, a novel power storage device, an electrode with less deterioration, an electrode with a high capacity, a long-life power storage device, a power storage device with less deterioration, a power storage device with high energy density, or a highly reliable power storage device is provided. The electrode includes a graphene compound including a graphene layer and a substituted or unsubstituted chain group, and an active material. The graphene layer is bonded to the chain group through a substituent containing silicon. The graphene compound includes a region in contact with the active material in particle form. The active material includes an element A, which is one or more elements selected from elements belonging to Group 1 and elements belonging to Group 2, and an element M, which is one or more elements selected from manganese and nickel. The chain group includes one or more groups selected from a carbonyl group, an ester group, a carboxyl group, an ether group, and an epoxy group.

Electrode and power storage device comprising graphene compound

A quinoxaline derivative that is a novel organic compound is provided. A quinoxaline derivative represented by General Formula (G1) has a structure in which a quinoxaline skeleton is bonded to the 9-position of an anthracene skeleton, the 10-position of the anthracene skeleton is bonded to a heteroaromatic ring, and the 3-position of the heteroaromatic ring is nitrogen. In General Formula (G1) shown above, a and b each independently represent a substituted or unsubstituted arylene group having 6 to 13 carbon atoms in a ring. In addition, m and n are each independently 0, 1, or 2.

Organic compound, light-emitting device, light-emitting apparatus, electronic device, and lighting device

A positive electrode active material in which a capacity decrease caused by charge and discharge cycles is suppressed is provided. Alternatively, a positive electrode active material having a crystal structure that is unlikely to be broken by repeated charging and discharging is provided. The positive electrode active material contains titanium, nickel, aluminum, magnesium, and fluorine, and includes a region where titanium is unevenly distributed, a region where nickel is unevenly distributed, and a region where magnesium is unevenly distributed in a projection on its surface. Aluminum is preferably unevenly distributed in a surface portion, not in the projection, of the positive electrode active material.

Positive electrode active material, secondary battery, and electronic device

A material that can be used in a wide temperature range is provided. A graphene compound includes graphene or graphene oxide and a substituted or unsubstituted chain group, the chain group includes two or more ether bonds, and the chain group is bonded to the above graphene or graphene oxide through a Si atom. Alternatively, a method for forming a graphene compound includes a first step and a second step after the first step. In the first step, graphene oxide and a base are stirred under a nitrogen stream. In the second step, the mixture is cooled to room temperature, a silylating agent that has a group having two or more ether bonds is introduced into the mixture, and the obtained mixture is stirred. The base is butylamine, pentylamine, hexylamine, diethylamine, dipropylamine, dibutylamine, triethylamine, tripropylamine, or pyridine.

Graphene compound, method for forming graphene compound, and lithium-ion storage battery

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.

Light-emitting device

A novel organic compound is provided. Alternatively, an organic compound that exhibits light emission with favorable chromaticity is provided. Alternatively, an organic compound that exhibits blue light emission with favorable chromaticity is provided. Alternatively, a light-emitting device with favorable emission efficiency is provided. Alternatively, an organic compound having a high carrier-transport property is provided. Alternatively, an organic compound with favorable reliability is provided. An organic compound having at least one amino group in which any one of a substituted or unsubstituted dibenzofuranyl group, a substituted or unsubstituted dibenzothiophenyl group, and a substituted or unsubstituted carbazolyl group is bonded to any one of a substituted or unsubstituted naphthobisbenzofuran skeleton, a substituted or unsubstituted naphthobisbenzothiophene skeleton, and a substituted or unsubstituted naphthobenzothienobenzofuran skeleton is provided.

Organic compound, light-emitting device, light-emitting apparatus, electronic device, display device, and lighting device

A novel compound is provided. Alight-emitting device having high emission efficiency and a long lifetime is also provided. An organic compound is represented by General Formula (G2), in which a benzo[a]anthracene skeleton is bonded to the 2-position of an anthracene skeleton. In General Formula (G2), R1 to R3, R5 to R12, and R21 to R29 each independently represent any one of hydrogen, an alkyl group having 1 to 6 carbon atoms, a cycloalkyl group having 3 to 6 carbon atoms, and a substituted or unsubstituted aryl group having 6 to 13 carbon atoms in a ring. Another embodiment of the present invention is a light-emitting device including the compound.

Organic compound, light-emitting device, light-emitting apparatus, electronic apparatus, and lighting apparatus

A novel organic compound with favorable thermophysical properties is provided. An organic compound represented by General Formula (G1) is provided. At least one of Xto Xis a secondary or tertiary alkyl group having 3 to 6 carbon atoms in which a carbon atom bonded to a phenyl group branches. Each of Rto Ris independently any of hydrogen, an alkyl group having 1 to 6 carbon atoms, a cycloalkyl group having 3 to 12 carbon atoms, and an unsubstituted or alkyl-substituted aryl group having 6 to 13 carbon atoms. Arrepresents a substituted or unsubstituted condensed heteroaromatic ring skeleton having 8 to 60 carbon atoms and composed of two or more aromatic rings, and Arrepresents a substituted or unsubstituted aryl group having 6 to 25 carbon atoms. Furthermore, n is any of 1 to 3.

Organic compound, light-emitting device, optical device, light-emitting apparatus, electronic device, and lighting device

A novel organic compound represented by General Formula (G1) is provided. In General Formula (G1), Xand Xeach 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, Arrepresents 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, Arrepresents 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 Armay be identical or different.

Organic compound, optical device, light-emitting device, light-emitting apparatus, electronic device, and lighting device

A novel organic compound with which the emission characteristics, emission efficiency, and reliability of a light-emitting element can be improved is provided. The organic compound has an imidazo[1,2-f]phenanthridine skeleton and a dibenzothiophene skeleton or a dibenzofuran skeleton bonded through an arylene group. The light-emitting element including the organic compound in a light-emitting layer shows high efficiency and low power consumption.

Organic compound, light-emitting element, light-emitting device, electronic device, and lighting device

Provided is a light-emitting element with high emission efficiency including a fluorescent material as a light-emitting substance. In a light-emitting element including a pair of electrodes and an EL layer between the pair of electrodes, a delayed fluorescence component due to triplet-triplet annihilation accounts for 20% or more of light emitted from the EL layer, and the light has at least one emission spectrum peak in the blue wavelength range. The EL layer includes an organic compound in which an energy difference between the lowest singlet excited energy level and the lowest triplet excited energy level is 0.5 eV or more. The EL layer includes a benzo[a]anthracene compound.

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Kanagawa, Japan

Hiroshi Kadoma