Semiconductor Energy Laboratory Co., Ltd.

Hiroko Abe

Satoshi Seo

Shunpei Yamazaki

Ryoji Nomura

Mikio Yukawa

Satoko Shitagaki

Hideko Inoue

Yuji Iwaki

Jun Koyama

Mitsuaki Osame

Hisao Ikeda

Yasuyuki Arai

Daisuke Kumaki

Yoshitaka Moriya

Nobuharu Ohsawa

Aya Anzai

Atsushi Tokuda

Masahiko Hayakawa

Keisuke Miyagawa

Yasuko Watanabe

Yukie Nemoto

Yukari Ando

Yasuo Nakamura

Yu Yamazaki

Masakazu Murakami

Hajime Kimura

Kiyoshi Kato

Junichiro Sakata

Tamae Takano

Yoshinobu Asami

Takako Takasu

Sachiko Yamagata

Yu Kojima

Akihisa Shimomura

Yoshifumi Tanada

Harue Nakashima

Satoshi Semiconductor Energy Laboratory Co Ltd Seo

Mikio c/o Semiconductor Energy Laboratory Co Ltd Yukawa

Ryoji c/o Semiconductor Energy Laboratory Co Ltd Nomura

An electroluminescent element which can easily control the balance of color in white emission (white balance) is provided according to the present invention. The electroluminescent element comprises a first light-emitting layer containing one kind or two or more kinds of light-emitting materials, and a second light-emitting layer containing two kinds of light-emitting materials (a host material and a phosphorescent material) in which the phosphorescent material is doped at a concentration of from 10 to 40 wt %, preferably, from 12.5 to 20 wt %. Consequently, blue emission can be obtained from the first light-emitting layer and green and red (or orange) emission can be obtained from the second light-emitting layer. An electroluminescent element having such device configuration can easily control white balance since emission peak intensity changes at the same rate in case of increasing a current density.

Electroluminescent element and light-emitting device

The invention provides a semiconductor device which is non-volatile, easily manufactured, and can be additionally written. A semiconductor device of the invention includes a plurality of transistors, a conductive layer which functions as a source wiring or a drain wiring of the transistors, and a memory element which overlaps one of the plurality of transistors, and a conductive layer which functions as an antenna. The memory element includes a first conductive layer, an organic compound layer and a phase change layer, and a second conductive layer stacked in this order. The conductive layer which functions as an antenna and a conductive layer which functions as a source wiring or a drain wiring of the plurality of transistors are provided on the same layer.

Semiconductor device

An electroluminescent element which can easily control the balance of color in white emission (white balance) is provided according to the present invention. The electroluminescent element comprises a first light-emitting layer containing one kind or two or more kinds of light-emitting materials, and a second light-emitting layer containing two kinds of light-emitting materials (a host material and a phosphorescent material) in which the phosphorescent material is doped at a concentration of from 10 to 40 wt %, preferably, from 12.3 to 20 wt %. Consequently, blue emission can be obtained from the first light-emitting layer and green and red (or orange) emission can be obtained from the second light-emitting layer. An electroluminescent element having such device configuration can easily control white balance since emission peak intensity changes at the same rate in case of increasing a current density.

The present invention provides a display device including a nonvolatile memory circuit to which data can be added without increasing the number of manufacturing steps, and an electronic appliance using the display device. A display device of the present invention has a memory circuit that includes a memory element with a simple structure in which an organic compound layer is interposed between a pair of conductive layers. According to the present invention having the above mentioned structure, a display device having a nonvolatile memory circuit to which data can be added can be provided without increasing the number of manufacturing steps.

Display device with semiconductor memory cell

Semiconductor elements stacked and bonded with an anisotropic conductive adhesive

Light-emitting device having phosphorescent material

An organometallic complex according to the present invention comprises a structure represented by the following general formula (1). In the formula, Rto Rare any one selected from the group consisting of hydrogen, a halogen element, an acyl group, an alkyl group, an alkoxy group, an aryl group, a cyano group, and a heterocyclic group, Ar is an aryl group having an electron-withdrawing group or a heterocyclic group having electron-drawing group, and M is an element of Group 9 or an element of Group 10. 

Organometal complex and light-emitting element using the same

Memory device made from stacked substrates bonded with a resin containing conductive particles

A layer included in an electroluminescent element is required to be thickened to optimize light extraction efficiency of the electroluminescent element and to prevent short-circuit between electrodes. However, in a conventional element material, desired light extraction efficiency cannot be accomplished since drive voltage rises or power consumption is increased as the element material is thickened. A composite is formed by mixing a conjugated molecule having low ionization potential and a substance having an electron-accepting property to the conjugated molecule. A composite layer included in an element is formed using the composite as an element material. The composite layer is arranged between a first electrode and a light emitting layer or between a second electrode and a light emitting layer. The composite layer has high conductivity; therefore, drive voltage does not rise even if a film thickness is increased. Thus, an electroluminescent element which can prevent short-circuit of an electrode can be provided.

Light emitting element and electronic device using the same

A light emitting element of the invention includes n pieces of light emitting layers (n is a natural number) between first and second electrodes. A first layer and a second layer are provided between the mlight emitting layer (m is a natural number of 1&#x2266;m&#x2266;n) and the m+1light emitting layer. The first and second layers are contacted to each other. The first layer contains a substance that transports holes easily and a substance with an electron accepting property. The second layer contains a substance that transports electrons easily and a substance with an electron donating property. Molybdenum oxide is used as the substance with the electron accepting property.

Light emitting element and light emitting device

To provide an aspect of a novel display device using a light emitting element which is composed of a cathode, an EL layer and an anode, and a manufacturing device of the display device. According to the present invention, dual-sided emission display can be performed in one sheet white color light emitting panelin which, for example, different images can be displayed on a topside screen and backside screen (full color display, monochrome display or area color display). Two polarizing platesare formed by shifting the position thereof with an angular deviation of 90 degrees each other so as to prevent outside light from passing through the pane, thereby realizing a black display when not displayed.

Light emitting device, electronic equipment and apparatus for manufacturing the same

One feature of a semiconductor device of the present invention is to include an electrode that serves as an electrode of a light-emitting element. The electrode includes a first layer and a second layer. Further, end portions of the electrode are covered with a partition layer having an opening portion. Moreover, a part of the electrode is exposed by the opening portion of the partition layer. One feature of a semiconductor device of the present invention is to include an electrode that serves as an electrode of a light-emitting element and a transistor. The electrode and the transistor are connected electrically to each other. The electrode includes a first layer and a second layer. Further, end portions of the electrode are covered with a partition layer having an opening portion. Moreover, the second layer is exposed by the opening portion of the partition layer.

Semiconductor device and light-emitting device

A quinoxaline derivative represented by a formula (1) is provided. In the formula (1), Rand Rand Rand Rare bonded to each other to form an aromatic ring, and Arto Areach independently represents an aryl group or a heterocyclic group. 

Quinoxaline derivative, and organic semiconductor device, electric field light emitting device, and electronic device which have the same

An electroluminescent element which includes host materials and guest materials in a part of an electroluminescent layer. Device characteristics (luminous efficiency, luminous characteristics, or the like) of an electroluminescent element are improved by using host materials and guest materials which have a common skeleton (represented by the following general formula) for an electroluminescent layer interposed between a pair of electrodes in the electroluminescent element. In the common skeleton, Xto X, each of which may be the same or different, are individually a hydrogen atom, a halogen atom, a lower alkyl group, an alkoxy group, an acyl group, a nitro group, a cyano group, an amino group, a dialkylamino group, a diarylamino group, a vinyl group which may have a substituent, an aryl group which may have a substituent, or a heterocyclic group which may have a substituent.

Electroluminescent device

Growing community of inventors

Tokyo, Japan

Hiroko Abe