Semiconductor Energy Laboratory Co., Ltd.

Yuko Kawata

Satoshi Seo

Hiroshi Kadoma

Nobuharu Ohsawa

Tetsuji Ishitani

Yasuhiro Niikura

Harue Osaka

Tomohiro Tamura

Momoko Kato

Sachiko Kawakami

Tsunenori Suzuki

Satoko Shitagaki

Hiromi Nowatari

Takako Takasu

Daisuke Kubota

Hiromi Seo

Tatsuyoshi Takahashi

Akio Yamashita

Takao Hamada

Satomi Mitsumori

Manabu Kobayashi

A novel substance with which an increase in life and emission efficiency of a light-emitting element can be achieved is provided. A carbazole compound having a structure represented by General Formula (G1) is provided. Note that a substituent which makes the HOMO level and the LUMO level of a compound in which a bond of the substituent is substituted with hydrogen deep and shallow, respectively is used as each of substituents in General Formula (G1) (R, R, Ar, and &#x3b1;). Further, a subsistent which makes the band gap (Bg) and the T1 level of a compound in which a bond of the substituent is substituted with hydrogen wide and high is used as each of the substituents in General Formula (G1) (R, R, Ar, and &#x3b1;). 

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

A novel substance with which an increase in life and emission efficiency of a light-emitting element can be achieved is provided. A carbazole compound having a structure represented by General Formula (G1) is provided. Note that a substituent which makes the HOMO level and the LUMO level of a compound in which a bond of the substituent is substituted with hydrogen deep and shallow, respectively is used as each of substituents in General Formula (G1) (R, R, Ar, and &#x3b1;). Further, a substituent which makes the band gap (Bg) and the T1 level of a compound in which a bond of the substituent is substituted with hydrogen wide and high is used as each of the substituents in General Formula (G1) (R, R, Ar, and &#x3b1;). 

A novel organic compound that can be used as a carrier-transport material, a host material, or a light-emitting material in a light-emitting element is provided. Specifically, an organic compound that can give a light-emitting element having favorable characteristics even when the organic compound is used in a light-emitting element emitting phosphorescence is provided. The organic compound has a bipyridine skeleton formed by two pyridine skeletons to each of which a dibenzothiophenyl group or a dibenzofuranyl group is bonded via an arylene group.

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

A dioxolane derivative represented by formula (G1) is provided. The explanation of the substituents is given in the specification. The use of the dioxolane derivative enables the production of a liquid crystal composition and a liquid crystal display device including the liquid crystal composition. 

Dioxolane derivative, liquid crystal composition, liquid crystal element, and liquid crystal display device

To provide a novel material for a liquid crystal composition that can be used for various liquid crystal display devices. A novel isosorbide derivative represented by General Formula (G2) is provided. In General Formula (G2), Ar, Ar, Ar, and Areach independently represent a substituted or unsubstituted arylene group having 6 to 12 carbon atoms, a substituted or unsubstituted cycloalkylene group having 3 to 12 carbon atoms, or a substituted or unsubstituted cycloalkenylene group having 4 to 12 carbon atoms; l, k, m, and n each independently represent any of 0 to 3; Rand Reach independently represent oxygen, a single bond, or a substituted or unsubstituted alkylene group having 1 to 12 carbon atoms; and Rand Reach independently represent hydrogen, oxygen, a substituted or unsubstituted alkyl group having 1 to 12 carbon atoms, or a substituted or unsubstituted alkoxy group having 1 to 12 carbon atoms.

Isosorbide derivative, liquid crystal composition, liquid crystal element, and liquid crystal display device

A novel compound having high triplet excitation energy and a bipolar property is provided. Specifically, a phenanthrene compound represented by General Formula (G1) is provided where Rto Rand Rto Rseparately represent any one of hydrogen, an alkyl group having 1 to 4 carbon atoms, and a substituted or unsubstituted aryl group having 6 to 13 carbon atoms, Ar represents a substituted or unsubstituted arylene group having 6 to 13 carbon atoms, and Z represents a sulfur atom or an oxygen atom. The use of the phenanthrene compound as a host material of a light-emitting layer in the presence of a phosphorescent dopant allows the formation of a light-emitting element with high current efficiency. 

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

A liquid crystal composition including a dioxolane compound represented by the general formula (G1) as a chiral agent is provided. In the general formula (G1), Rand Rindividually represent any of hydrogen, an alkyl group having 1 to 6 carbon atoms, an alkoxy group having 1 to 20 carbon atoms, an aryl group having 6 to 12 carbon atoms, and an alkyl group having 1 to 20 carbon atoms and having a phenyl group as a substituent; Rand Rmay be bonded to each other to form a ring; Rand Rindividually represent any of hydrogen, an alkyl group having 1 to 6 carbon atoms, and a cycloalkyl group; and Rto Rindividually represent any of hydrogen, an alkyl group having 1 to 4 carbon atoms, an alkoxy group having 1 to 4 carbon atoms, and an aryl group having 6 to 12 carbon atoms. 

Liquid crystal composition, liquid crystal element, and liquid crystal display device

A liquid crystal composition exhibiting a blue phase, which enables higher contrast, and a liquid crystal display device including the liquid crystal composition. The liquid crystal composition contains a chiral agent and liquid crystal containing a compound having three electron-withdrawing groups as end groups of a structure where a plurality of rings including at least one aromatic ring is linked to each other directly or with a linking group laid therebetween. At least one of the three electron-withdrawing groups includes a trifluoromethyl group. The peak of the diffracted wavelength on the longest wavelength side in the reflectance spectrum of the liquid crystal composition is less than or equal to 450 nm, preferably less than or equal to 420 nm. Furthermore, a liquid crystal display device can be provided with the use of the liquid crystal composition.

Liquid crystal composition and liquid crystal display device

A triazole derivative represented by General Formula (G0) is provided. In the General formula (G0), A represents a substituted or unsubstituted carbazolyl group, a substituted or unsubstituted dibenzothiophenyl group, or a substituted or unsubstituted dibenzofuranyl group, E represents substituted or unsubstituted triazolo [4,3 f]phenanthridine or substituted or unsubstituted triazolo [3,4-&#x3b1;]isoquinoline, and Ar represents a substituted or unsubstituted arylene group having 6 to 13 carbon atoms.E-Ar-A&#x2003;&#x2003;(G0)

Triazole derivative, heterocyclic compound, light-emitting element, light-emitting device, electronic device and lighting device

Provided is a heterocyclic compound that can be used for a carrier-transport material, a host material, or a light-emitting material in a light-emitting element. The heterocyclic compound has an indolo[3,2,1-jk]carbazole skeleton and a dibenzo[f,h]quinoxaline skeleton which are linked to each other through an arylene group. The wide band gap of the heterocyclic compound allows excitation of a green-emissive phosphorescent material, which contributes to the formation of a highly efficient light-emitting element.

Heterocyclic compound, light-emitting element, display module, lighting module, light-emitting device, display device, lighting device, and electronic device

A binaphthyl compound represented by General Formula (G1) is provided. In General Formula (G1), Arrepresents any of an arylene group, a cycloalkylene group, and a cycloalkenylene group, and m is any of 0 to 3; Rrepresents any of hydrogen, an alkyl group, and an alkoxy group; and one of R and Rrepresents a substituent represented by General Formula (G2) and the other thereof represents hydrogen. In General Formula (G2), Arrepresents any of an arylene group, a cycloalkylene group, and a cycloalkenylene group, and k is any of 1 to 3; and Rrepresents any of hydrogen, an alkyl group, and an alkoxy group. 

Binaphthyl compound, liquid crystal composition, liquid crystal element, and liquid crystal display device

An object of one embodiment of the present invention is to provide a novel oxadiazole derivative as a substance having high excitation energy, in particular, a substance having high triplet excitation energy. One embodiment of the present invention is an oxadiazole derivative represented by General Formula (G1) below.  In General Formula (G1), Rrepresents either an alkyl group having 1 to 4 carbon atoms or a substituted or unsubstituted aryl group having 6 to 13 carbon atoms. In General Formula (G1), Rto Rseparately represent any one of a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, and a substituted or unsubstituted aryl group having 6 to 13 carbon atoms. In General Formula (G1), &#x3b1; represents a substituted or unsubstituted arylene group having 6 to 13 carbon atoms. In General Formula (G1), Z represents either a sulfur atom or an oxygen atom.

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Kanagawa, Japan

Yuko Kawata