Semiconductor Energy Laboratory Co., Ltd.

Airi Ueda

Satoshi Seo

Takeyoshi Watabe

Nobuharu Ohsawa

Tomohiro Kubota

Yuta Kawano

Yuko Kubota

Shunpei Yamazaki

Hiromitsu Kido

Hideko Yoshizumi

Takao Tosu

Hiromi Seo

Tomoya Yamaguchi

Yasushi Kitano

Harue Osaka

Tomoka Hara

Shiho Nomura

Keito Tosu

Ryo Narukawa

An organometallic complex having an emission peak in a long wavelength region (a visible region having a wavelength of 700 nm or greater or a near-infrared region) is provided. The organometallic complex has a structure represented by General Formula (G1), in which a ligand having a quinoxaline skeleton is coordinated to a central metal, and an electron-withdrawing group (e.g., fluorine, a cyano group, a trifluoromethyl group, a trifluoromethylsulfonyl group, or a pentafluorosulfanyl group) is included as a substituent at at least one substitutable position of the benzene ring of the quinoxaline skeleton of the ligand.

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

A material for a hole-transport layer includes a monoamine compound. The first aromatic group, the second aromatic group, and the third aromatic group are bonded to the nitrogen atom of the monoamine compound. The first and second aromatic groups each independently include 1 to 3 benzene rings. One or both of the first and second aromatic groups have one or more hydrocarbon groups each having 1 to 12 carbon atoms each forming a bond only by the sphybrid orbitals. The total number of the carbon atoms in the hydrocarbon group in the first or second aromatic group is 6 or more. The total number of the carbon atoms in all of the hydrocarbon groups in the first and second aromatic groups is 8 or more. The third aromatic group is a substituted or unsubstituted monocyclic condensed ring or a substituted or unsubstituted bicyclic or tricyclic condensed ring.

Material for hole-transport layer, material for hole-injection layer, organic compound, light-emitting device, light-emitting apparatus, electronic device, and lighting device

An organic semiconductor device with low driving voltage is provided. The light-emitting device includes an anode, a cathode, and an EL layer between the anode and the cathode. The EL layer includes a hole-transport layer and alight-emitting layer. The hole-transport layer is positioned between the anode and the light-emitting layer. The hole-transport layer is not in contact with the anode. The hole-transport layer includes a transport layer material for a light-emitting device and the GSP_slope that is a potential gradient of a surface potential of an evaporated film of the material is higher than or equal to 20 (mV/nm).

Hole-transport layer material, electron-blocking layer material, electron-transport layer material, hole-blocking layer material, light-emitting device, light-emitting apparatus, 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

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.

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 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.

Light-emitting device comprising charge-generation layer between light-emitting units

An organic semiconductor device with low driving voltage is provided. The organic semiconductor device includes a layer containing an organic compound between a pair of electrodes. The layer containing an organic compound includes a hole-transport region. The hole-transport region includes a first layer and a second layer. The first layer is positioned between the anode and the second layer. When a potential gradient of a surface potential of an evaporated film is set as GSP (mV/nm), a value obtained by subtracting GSP of an organic compound in the second layer from GSP of an organic compound in the first layer is less than or equal to 20 (mV/nm).

Organic semiconductor device, organic el device, photodiode sensor, display device, light-emitting apparatus, electronic device, and lighting device

An organic compound having a hole-transport property and a low refractive index is provided. An organic compound represented by General Formula (G1) shown below is provided. In General Formula (G1), Arrepresents a substituted or unsubstituted arylene group having 6 to 13 carbon atoms in a ring, n represents an integer of 0 or 1, and Arrepresents an aryl group having 6 to 10 carbon atoms in a ring and includes at least one branched-chain or cyclic alkyl group having 3 to 12 carbon atoms. The total number of carbon atoms of the branched-chain or cyclic alkyl group in Aris more than or equal to 6. Rto Reach independently represent an alkyl group having 1 to 6 carbon atoms. Rto Rand Rto Reach independently represent a hydrogen atom or an alkyl group having 1 to 4 carbon atoms. Any one of Rto Rand any one of Rto Reach represent a bond directly bonded to a nitrogen atom, and the others each independently represent a hydrogen atom or an alkyl group having 1 to 4 carbon atoms.

To provide a novel arylamine compound with a low refractive index. The provided arylamine compound includes at least one aromatic group. The aromatic group includes a first benzene ring, a second benzene ring, a third benzene ring, and at least three alkyl groups. The first benzene ring, the second benzene ring, and the third benzene ring are directly bonded in this order. The first benzene ring is bonded to nitrogen of amine. The first benzene ring may further include a substituted or unsubstituted phenyl group. The second benzene ring or the third benzene ring may further include an alkylated phenyl group. Each of first positions and third positions of two or more of the first to third benzene rings is independently bonded to another benzene ring, a benzene ring of the alkylated phenyl group, any of the at least three alkyl groups, or the nitrogen of the amine.

Arylamine compound, hole-transport layer material, hole-injection layer material, light-emitting device, light-emitting apparatus, electronic apparatus, and lighting device

A novel organic compound is provided. That is, a novel organic compound that is effective in improving element characteristics and reliability is provided. The organic compound is represented by General Formula (G1) having a dibenzobenzofuroquinoxaline skeleton or a dibenzobenzothienoquinoxaline skeleton. In General Formula (G1), Q represents O or S, at least one of Rto Rrepresents a first group having a substituted or unsubstituted condensed aromatic ring or condensed heteroaromatic ring having 3 to 30 carbon atoms, and the other or others of Rto Reach independently represent any one of hydrogen, a halogeno group, a hydroxy group, an amino group, a nitro group, and a group having 1 to 50 carbon atoms.

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

A novel light-emitting device with a microcavity structure which can improve the emission efficiency compared to the conventional one is provided. In a light-emitting device with a microcavity structure that emits light in a near-infrared range, reflectance of one or both of a first electrode (reflective electrode) and a second electrode (semi-transmissive and semi-reflective electrode) with respect to light in a near-infrared range (e.g., light with a wavelength of 850 nm) is higher than the reflectance thereof with respect to light in a visible light range (greater than or equal to 400 nm and less than 750 nm).

A light-emitting device with high emission efficiency is provided. The light-emitting device includes an anode, a cathode, and an EL layer positioned between the anode and the cathode. The EL layer includes a light-emitting layer and an electron-transport layer; the light-emitting layer includes a light-emitting material; the electron-transport layer includes an organic compound having an electron-transport property and a metal complex of an alkali metal; the ordinary refractive index of the organic compound having an electron-transport property in a peak wavelength of light emitted from the light-emitting material is greater than or equal to 1.50 and less than or equal to 1.75; and the ordinary refractive index of the metal complex of an alkali metal in the peak wavelength of the light emitted from the light-emitting material is greater than or equal to 1.45 and less than or equal to 1.70.

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Kanagawa, Japan

Airi Ueda