Semiconductor Energy Laboratory Co., Ltd.

Yuta Kawano

Satoshi Seo

Takeyoshi Watabe

Nobuharu Ohsawa

Airi Ueda

Hiromitsu Kido

Hideko Yoshizumi

Tomoya Yamaguchi

Hiromi Seo

Toshiki Sasaki

Tomohiro Kubota

Takao Tosu

Harue Osaka

Yasushi Kitano

Satomi Watabe

Shiho Nomura

Keito Tosu

Ryo Narukawa

Akira Nagasaka

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 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.

Providing a novel organometallic complex represented by Structure Formula (G1). Ato Aindependently represent an alkyl group having 1 to 6 carbon atoms or a cycloalkyl group having 3 to 6 carbon atoms. Rto Rindependently 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 cyano group, wherein at least one of Rto Rrepresents a cyano group. Rto Rindependently represent an alkyl group having 2 to 6 carbon atoms or a cycloalkyl group having 3 to 6 carbon atoms. Rand Rindependently represent any one of hydrogen, a methyl group, and an ethyl group. Note that Rand Rmay be bonded to each other to form a ring, and Rand Rmay be bonded to each other to form a ring.

Organometallic complex, light-emitting material for top emission, light-emitting device, light-emitting apparatus, electronic device, and lighting device

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.

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

A benzofuropyrimidine derivative or benzothienopyrimidine derivative that is a novel organic compound is provided. An organic compound represented by General Formula (G1) below. Q represents oxygen or sulfur. Ar1, Ar2, Ar3, and Ar4 each independently represent an aromatic hydrocarbon ring, and the number of carbon atoms included in the aromatic hydrocarbon ring is 6 to 25. m and n are each 0 or 1. A is a group having 12 to 100 carbon atoms in total and includes one or more of a benzene ring, a naphthalene ring, a fluorene ring, a phenanthrene ring, a triphenylene ring, a heteroaromatic ring including a dibenzothiophene ring, a heteroaromatic ring including a dibenzofuran ring, a heteroaromatic ring including a carbazole ring, a benzimidazole ring, and a triphenylamine structure.

Organic compound

A novel organic compound is provided. The organic compound is represented by General Formulae (G1), (u1), and (g1), where Ar represents a substituted or unsubstituted condensed aromatic ring, one of Rand Rrepresents a group represented by General Formula (u1), and any one of Rto Rrepresents a bond. In addition, A is a group represented by General Formula (g1), and B represents a substituted or unsubstituted phenyl group. Moreover, n is an integer of 0 to 2, and Qand Qindependently represent an oxygen atom or a sulfur atom.

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.

Light-emitting device including organic compound and metal complex

To provide a light-emitting device not only including a light-emitting layer in which energy is efficiently transferred from a host material to a guest material but also having high reliability. In the light-emitting device, the light-emitting layer includes an organic compound having a specific naphthofuropyrazine skeleton as a host material and a light-emitting substance (e.g., an organometallic complex) whose T1 level (T) is within a certain range as a guest material, thereby increasing not only the efficiency of energy transfer from the host material to the guest material but also the reliability.

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Kanagawa, Japan

Yuta Kawano