Semiconductor Energy Laboratory Co., Ltd.

Other

Sharp Kabushiki Kaisha Corporation

Satoshi Seo

Nobuharu Ohsawa

Shunpei Yamazaki

Hideko Inoue

Tsunenori Suzuki

Sachiko Kawakami

Satoko Shitagaki

Hiromi Seo

Harue Osaka

Toshiki Sasaki

Takahiro Ishisone

Ryoji Nomura

Tatsuyoshi Takahashi

Hiroshi Kadoma

Takahiro Ushikubo

Takeyoshi Watabe

Hisao Ikeda

Naoaki Hashimoto

Daisuke Kumaki

Hiroki Suzuki

Hiromi Nowatari

Kunihiko Suzuki

Hiroko Abe

Kaoru Hatano

Hiroko Nomura

Junichiro Sakata

Hiromitsu Kido

Harue Nakashima

Yuji Iwaki

Yusuke Nonaka

Masakazu Egawa

Kaori Ogita

Hiroko Yamazaki

Tetsuo Tsutsui

Hideaki Kuwabara

Mitsuaki Osame

Takahiro Kawakami

Tomoya Aoyama

Keisuke Miyagawa

Yoshifumi Tanada

Aya Anzai

Yasuo Nakamura

Takuya Kawata

Yoshiaki Oikawa

Tomohiro Kubota

Takashi Hamada

Masakazu Murakami

Hajime Kimura

Takeshi Nishi

Shingo Eguchi

Jun Koyama

Teppei Oguni

Yoshiharu Hirakata

Yu Yamazaki

Masataka Nakada

Hironobu Shoji

Masahiro Takahashi

Daiki Nakamura

Yohei Momma

Yasuhiko Takemura

Yasuyuki Arai

Masaaki Hiroki

Daisuke Kubota

Ryo Hatsumi

Keitaro Imai

Nozomu Sugisawa

Teruaki Ochiai

Koichiro Tanaka

Masahiko Hayakawa

Akihiro Chida

Kohei Yokoyama

Taisuke Kamada

Yasuhiro Niikura

Takuya Hirohashi

Ryota Fukumoto

Mayumi Mikami

Hiroyuki Miyake

Kei Takahashi

Hideto Ohnuma

Koji Kusunoki

Yasuhiro Jinbo

Mayumi Mizukami

Takeshi Noda

Masahiro Katayama

Takahiro Ibe

Noriko Shibata

Kiyoshi Kato

Akihisa Shimomura

Hideaki Shishido

Takuya Tsurume

Yoshitaka Yamamoto

Kazutaka Inukai

Minoru Takahashi

Akio Yamashita

Mikio Yukawa

Ikuko Kawamata

Seiichi Mitsui

Manabu Niboshi

Kunio Hosoya

Tomoyuki Iwabuchi

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.

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

Emission efficiency of a light-emitting element is improved. The light-emitting element has a pair of electrodes and an EL layer between the pair of electrodes. The EL layer includes a first light-emitting layer and a second light-emitting layer. The first light-emitting layer includes a fluorescent material and a host material. The second light-emitting layer includes a phosphorescent material, a first organic compound, and a second organic compound. An emission spectrum of the second light-emitting layer has a peak in a yellow wavelength region. The first organic compound and the second organic compound form an exciplex.

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

A light-emitting device with high emission efficiency is provided. The light-emitting device includes a first electrode, a second electrode, and an EL layer positioned between the first electrode and the second electrode. The EL layer includes at least a light-emitting layer, a first layer, a second layer, and a third layer. The first layer is positioned between the first electrode and the light-emitting layer. The third layer is positioned between the first layer and the light-emitting layer. The second layer is positioned between the first layer and the third layer. The first layer includes a first organic compound. The second layer includes a second organic compound. The third layer includes a third organic compound. The ordinary refractive index of the second organic compound is higher than the ordinary refractive indices of the first organic compound and the third organic compound.

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

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

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.

Estimation of cavity length of light-emitting device

A light-emitting element having high emission efficiency which includes a fluorescent material as a light-emitting substance is provided. A light-emitting element includes a pair of electrodes and an EL layer between the pair of electrodes. The EL layer includes a light-emitting layer. The light-emitting layer includes a host material and a guest material. The host material has a difference of more than 0 eV and less than or equal to 0.2 eV between a singlet excitation energy level and a triplet excitation energy level. The guest material is capable of emitting fluorescence. The triplet excitation energy level of the host material is higher than a triplet excitation energy level of the guest material.

Light-emitting element, display device, electronic device, and lighting device

A light-emitting device with a long lifetime is provided. A light-emitting device with high reliability is provided. The light-emitting device includes a first electrode, a first light-emitting layer, a first layer, a second layer, a third layer, a second light-emitting layer, and a second electrode stacked in this order. The first layer contains a first organic compound and a first substance. The second layer contains a second organic compound. The third layer contains a second substance. The first organic compound is an electron-transport material. The first substance is a metallic salt, a metal oxide, or an organometallic salt. The second organic compound is an electron-transport material. The second substance is an electron-injection material. The second layer has a lower concentration of the first substance than the first layer.

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

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.

A near-infrared organic EL device with favorable efficiency is provided. A light-emitting device including a first electrode, a second electrode, and an EL layer is provided; in which the EL layer is positioned between the first electrode and the second electrode; in which the EL layer emits light having a peak of an emission spectrum in a wavelength range of greater than or equal to 750 nm and less than or equal to 1000 nm; in which one of the first electrode and the second electrode is an electrode having a transmitting property with respect to light with a peak wavelength of the emission spectrum of the EL layer; in which a first layer is provided in contact with a surface of the electrode having a transmitting property, which is opposite to a surface facing the EL layer; in which the first layer contains an organic compound; and in which the first layer has the local maximum value of an extinction coefficient k in the visible light region.

A benzofuropyrimidine derivative or a benzothienopyrimidine derivative, which is a novel organic compound, is provided. The organic compound is represented by General Formula (G1) below. In General Formula (G1), Q represents oxygen or sulfur. A represents any one of a substituted or unsubstituted condensed aromatic hydrocarbon ring having 6 to 13 carbon atoms in the ring and a substituted or unsubstituted π-electron rich condensed heteroaromatic ring having 6 to 13 carbon atoms in the ring; and R1 to R19 each independently represent any one of hydrogen, an alkyl group having 1 to 6 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 7 carbon atoms in the ring, and a substituted or unsubstituted aryl group having 6 to 13 carbon atoms in the ring.

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

A light-emitting apparatus with low power consumption is provided. A light-emitting apparatus including a first light-emitting device and a first color conversion layer. The first light-emitting device includes an anode, a cathode, and an EL layer positioned between the anode and the cathode. The EL layer includes a layer including a material with a refractive index lower than or equal to 1.75 at 467 nm. The first color conversion layer includes a first substance capable of emission by absorbing light. Light emitted from the first light-emitting device enters the first color conversion layer.

Light-emitting device, electronic device, and lighting device

A light-emitting device with high emission efficiency is provided. The light-emitting device includes an EL layer and a light-transmitting electrode. The EL layer includes a light-emitting layer and a low refractive index layer. The low refractive index layer is positioned between the light-emitting layer and the light-transmitting electrode. A cap layer is in contact with a surface of the light-transmitting electrode on the side opposite to the EL layer. The cap layer includes a high refractive index material having an ordinary refractive index of higher than or equal to 1.90 and lower than or equal to 2.40 and an ordinary extinction coefficient of higher than or equal to 0 and lower than or equal to 0.01. The low refractive index layer includes a low refractive index material having an ordinary refractive index of higher than or equal to 1.60 and lower than or equal to 1.70.

A novel light-emitting device is provided. A light-emitting device with high emission efficiency is provided. A light-emitting device with a favorable lifetime is provided. A light-emitting device with low driving voltage is provided. A light-emitting device with favorable display quality is provided. A light-emitting device that includes an anode, a cathode, and an EL layer positioned between the anode and the cathode, in which the EL layer includes a hole-injection layer, a light-emitting layer, and an electron-transport layer; in which the electron-transport layer contains an electron-transport material and an alkali metal, an alkaline earth metal, a compound of an alkali metal or an alkaline earth metal, or a complex thereof; and in which the resistivity of the hole-injection layer is within a certain range, is provided.

An object is to provide an organic compound with a low refractive index. Alternatively, a novel organic compound with a low refractive index and an electron-donating property is provided. Alternatively, an EL device with high emission efficiency is provided. An organic compound having an arylamine skeleton including a fluorine atom or an acridine skeleton including a fluorine atom and an EL device using the organic compound are provided. The EL device preferably includes a hole-injection layer containing the organic compound having an arylamine skeleton including a fluorine atom or an acridine skeleton including a fluorine atom and a substance showing an electron-accepting property with respect to the organic compound.

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

A light-emitting device with high emission efficiency and reliability is provided. The light-emitting device includes a fluorescent light-emitting layer and a phosphorescent light-emitting layer. A host material used in the fluorescent light-emitting layer has a function of converting triplet excitation energy into light emission and a guest material used in the fluorescent light-emitting layer emits fluorescence. The guest material has a molecular structure including a luminophore and a protecting group, and one molecule of the guest material includes five or more protecting groups. The introduction of the protecting groups into the molecule inhibits transfer of triplet excitation energy from the host material to the guest material by the Dexter mechanism. An alkyl group or a branched-chain alkyl group is used as the protecting group. The longest wavelength absorption band in the absorption spectrum of the guest material in the phosphorescent light-emitting layer has an overlap with the emission spectrum of the host material in the phosphorescent light-emitting layer.

Light-emitting device, light-emitting appliance, display device, electronic appliance, and lighting device

Growing community of inventors

Kanagawa, Japan

Satoshi Seo