Semiconductor Energy Laboratory Co., Ltd.

Harue Nakashima

Sachiko Kawakami

Ryoji Nomura

Satoshi Seo

Nobuharu Ohsawa

Masakazu Egawa

Kumi Kojima

Satoko Shitagaki

Daisuke Kumaki

Tsunenori Suzuki

Hiroko Murata

Junichiro Sakata

Hisao Ikeda

Yuji Iwaki

Hiroko Yamazaki

Yukie Nemoto

Shunpei Yamazaki

Hiroko Abe

Takako Takasu

It is an object of the present invention to provide a light emitting element, which is resistant to repetition of an oxidation reaction. It is another object of the invention to provide a light emitting element, which is resistant to repetition of a reduction reaction. An anthracene derivative is represented by a general formula (1). In the general formula (1), R1 represents hydrogen or an alkyl group having 1 to 4 carbon atoms, R2 represents any one of hydrogen, an alkyl group having 1 to 4 carbon atoms and an aryl group having 6 to 12 carbon atoms, R3 represents any one of hydrogen, an alkyl group having 1 to 4 carbon atoms, and an aryl group having 6 to 12 carbon atoms, Ph1 represents a phenyl group, and X1 represents an arylene group having 6 to 15 carbon atoms. 

Anthracene derivative, light emitting element using the same, and light emitting device using the same

Anthracene derivative, light-emitting element using the same, and light-emitting device using the same

It is an object of the present invention to provide a composite material that can be used for manufacturing a heat-resistant light-emitting element, provide a composite material that can be used for manufacturing a heat-resistant light-emitting element that can be driven with stability for a long period of time, and further, provide a composite material that can be used for manufacturing a light-emitting element that easily prevents short circuit between electrodes and uses less power. The present invention provides a composite material that has a first metal oxide skeleton including a first metal atom and an organic compound that is bound to the first metal atom by forming a chelate, where the first metal oxide exhibits an electron accepting property to the organic compound.

Composite material, light-emitting element, light-emitting device, and manufacturing method thereof

An object is to provide a novel anthracene derivative. Another object is to provide a light-emitting element with high luminous efficiency. Yet another object is to provide a light-emitting element with a long lifetime. Still another object is to provide a light-emitting device and an electronic device having a long lifetime by using the light-emitting elements of the present invention. The anthracene derivative represented by General Formula (1) is provided. The ability of the anthracene derivative represented by General Formula (1) to exhibit high luminous efficiency allows the production of a light-emitting element with high luminous efficiency and a long lifetime.

Anthracene derivative, and light-emitting element, light-emitting device, electronic device using anthracene derivative

It is an object of the present invention to provide a material having a high Tg and a wide energy gap. The present invention provides a spirofluorene derivative represented by General Formula 1. (In the formula, Ris any one of hydrogen, an alkyl group having 1 to 4 carbon atoms, or a group represented by General Formula 2. Each of Rand Ris either hydrogen or an alkyl group having 1 to 4 carbon atoms and may be identical or different. Ris an aryl group having 6 to 15 carbon atoms. Each of Rand Ris any one of hydrogen, an alkyl group having 1 to 4 carbon atoms, or an aryl group having 6 to 15 carbon atoms and may be identical or different.) 

Spirofluorene derivative, material for light-emitting element, light-emitting element, light-emitting device, and electronic device

It is an object to provide a novel material having a bipolar property, a light emitting element provided with the novel material, and a display device that includes the light emitting element. It is an object to provide a pyrazine derivative represented by the following general formula (g-1). 

Pyrazine derivative, and light emitting element, display device, electronic device using the pyrazine derivative

One object of the present invention is to provide a light emitting element that includes an organic compound and an inorganic compound and has low driving voltage. The light emitting element of the invention includes a plurality of layers between a pair of electrodes, wherein the plurality of layers includes a layer that contains a carbazole derivative represented by a general formula (1) and an inorganic compound exhibiting an electron accepting property with respect to the carbazole derivative. By utilizing this structure, electrons are transported between the carbazole derivative and the inorganic compound and carriers are internally generated, and hence, the driving voltage of the light emitting element can be reduced. 

Light emitting element and light emitting device

An oxadiazole derivative represented by the following general formula (G1) is synthesized and applied to the light emitting element, A; 

Oxadiazole derivative, and light emitting element, light emitting device, and electronic device using the oxadiazole derivative

It is an object of the present invention to provide a material which is excellent in a hole injecting property and a hole transporting property, and to provide a light emitting element and a light emitting device using a material which is excellent in a hole injecting property and a hole transporting property. The present invention provides a carbazole derivative represented by a general formula (1). The carbazole derivative according to the present invention is excellent in the hole injecting property. By using the carbazole derivative according to the present invention as a hole injecting material for a hole injecting layer of a light emitting element, a driving voltage can be reduced. In addition, a lower driving voltage, improvement of the luminous efficiency, a longer life time, and higher reliability can be realized by applying the material to a light emitting element or a light emitting device.

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Kanagawa, Japan

Harue Nakashima