Canon Kabushiki Kaisha

Keiji Okinaka

Akihito Saitoh

Naoki Yamada

Akihiro Senoo

Takao Takiguchi

Satoshi Igawa

Masashi Hashimoto

Kazunori Ueno

Shinjiro Okada

Masataka Yashima

Jun Kamatani

Koichi Suzuki

Minako Nakasu

Maki Okajima

Jian Chen

Chika Negishi

Hajime Muta

Tatsundo Kawai

Masanori Muratsubaki

Kengo Kishino

Hiroyuki Tomono

Toshinori Hasegawa

Isao Kawata

Tetsuo Takahashi

Takashi Suzuki

Yosuke Nishide

Shigeru Suzuki

Tomona Yamaguchi

Tomonari Horikiri

Hiroshi Tanabe

Hikaru Hoshi

Yohei Iwasaki

Akihito Saito

Chika Nishi

Provided is an organic light emitting device with enhanced durability during continuous driving. The organic light emitting device includes: an anode, a cathode, and an organic compound layer being placed between the anode and the cathode and including at least a hole transport layer and an emission layer, in which: the emission layer contains a blue light emitting material; the hole transport layer contains a plurality of kinds of organic compounds; and an organic compound having the smallest ionization potential among the organic compounds includes a compound having no absorption spectrum peak in a blue color wavelength region in a radical cation state.

Organic light emitting device

Aspects of the present invention provide a blue organic light-emitting device having a continuous operation lifetime. An organic light-emitting device includes a light-emitting layer containing a dopant having the ability to trap electrons or holes, and a hole-blocking layer or electron-blocking layer, in which the difference between the LUMO of the dopant and the LUMO of a host material, the size relationship between the HOMO of the host material and the HOMO of the dopant, and the difference between the Tof the host material and the Tof the hole-blocking layer or between the Tof the host material and the Tof the electron-blocking layer, are specified.

Organic light-emitting device

The present invention provides a high-performance organic EL device and a novel compound used for the device. The novel compound of the present invention is a fluoranthene compound having the following general formula (2): The organic EL device of the present invention is an organic EL device comprising: an anode; a cathode; and an organic compound layer interposed between the anode and the cathode, wherein the organic compound layer has the fluoranthene compound.

Compound and organic EL device

To provide a compound excellent in light emitting properties and an organic light emitting device having the compound. The compound is a 4-aminofluorene compound represented by the following general formula (1): 

4-aminofluorene compound and organic light emitting device

An organic light-emitting device includes a first electrode, a second electrode, and a light-emitting layer disposed between the first and second electrodes. The light-emitting layer contains an organic compound emitting photoluminescent light with a peak wavelength of 430 to 480 nm. The organic compound has a profile factor of 0.02 or less at a wave number of 1,300 to 1,680 cmas calculated from Huang-Rhys factors.

It is an object of the present invention to provide an organic light emitting device having a long-life optical output. The organic light emitting device according to the present invention is provided with an emission layer including at least a host material, a light emitting material, and another material, wherein the another material has a smaller ionization potential than and almost the same hole mobility as or a greater hole mobility than an ionization potential and a hole mobility of a compound which forms an emission layer-side-interface.

A novel mono(benzo[k]fluoranthene) compound having a molecular structure containing at least one condensed ring aromatic group which is tricyclic or more at any of 7- to 9-positions of benzo[k]fluoranthene. Also an organic light emitting device including at least a pair of electrodes formed of an anode and a cathode, and a layer formed of an organic compound, the layer being interposed between the pair of electrodes, in which the layer formed of an organic compound contains a compound represented by the following structural formula. An organic light emitting device in which the layer is a light emitting layer. 

Compound and organic light emitting device using the compound

An organic light emitting device having long continuous driving lifetime is provided. The organic light emitting device includes an anode, a cathode, and an emission layer formed of an organic compound arranged between the anode and the cathode, in which the emission layer includes a light emitting material and a material having a smallest ionization potential, and an absorption spectrum in a radical cation state of the material having the smallest ionization potential in the emission layer does not have its absorption peak in an emission wavelength region of the light emitting material.

There are provided a compound represented by the general formula (1) and an organic light-emitting device which comprises the compound and has an optical output with remarkably high efficiency and high luminance.

Compound and organic light-emitting device

Provided is a novel dibenzo[a,c]anthracene compound having substituents, which can be used in an organic light emitting device.

Dibenzoanthracene compound and organic light emitting device having the same

There are provided a novel fused ring aromatic compound and an organic light-emitting device which has an optical output with extremely high efficiency and luminance, and also has extremely high durability. The organic light-emitting device includes an anode, a cathode, and a layer including an organic compound interposed between the anode and the cathode, wherein the layer comprises a fused ring aromatic compound represented by the general formula (I): wherein R, R, R, R, R, R, R, R, R, R, R, R, R, R, R, and Reach represent, independently of one another, a hydrogen atom, an alkyl group, a substituted or unsubstituted aralkyl group, a substituted or unsubstituted aryl group, a substituted or unsubstituted heterocyclic group, a substituted amino group, or a halogen atom.

Fused ring aromatic compound and organic light-emitting device using same

Provided is an organic electroluminescent device for emitting blue light, which has high luminous efficiency and good drive durability. This organic electroluminescent device for emitting blue light includes an anode, a cathode, and a layer which contains an organic compound interposed between the anodeand the cathode, the layer which contains an organic compound including at least a light-emitting layer, wherein the light-emitting layercontains a bipolar host having a hole mobility and an electron mobility of 10cm/Vs or greater, a light-emitting dopant and a carrier trapping dopant, and the light-emitting dopant energy gap E, the bipolar host energy gap E, and the carrier trapping dopant energy gap Eare such that E&#x3e;E&#x3e;E.

Organic electroluminescent device

There is provided a green-light-emitting device which has a high emission efficiency and a long continuous operational life, and which includes a pair of electrodes including an anode and a cathode; and a layer including an organic compound disposed between the pair of electrodes, wherein the layer includes a first compound represented by the general formula (I): wherein R, R, R, R, R, R, R, R, R, R, R, R, R, R, R, and Reach represent, independently of one another, a hydrogen atom, an alkyl group, a substituted or unsubstituted aralkyl group, a substituted or unsubstituted aryl group, a substituted or unsubstituted heterocyclic group, a substituted amino group, or a halogen atom; and a second compound with a pyrene skeleton or a fluorene skeleton having an energy gap larger than an energy gap of the first compound.

Growing community of inventors

Kawasaki, Japan

Keiji Okinaka