Canon Kabushiki Kaisha

Maki Okajima

Naoki Yamada

Keiji Okinaka

Koichi Suzuki

Akihiro Senoo

Tatsundo Kawai

Toshinori Hasegawa

Minako Nakasu

Hajime Muta

Akihito Saitoh

Masataka Yashima

Tomonari Horikiri

Tetsuo Takahashi

Takao Takiguchi

Yosuke Nishide

Hiroshi Tanabe

Jian Chen

Chika Negishi

Tomona Yamaguchi

Toshihide Kimura

Jun Kamatani

Masao Suzuki

Takeshi Yamamoto

Yasunori Chigono

Atsushi Nakamoto

Takahiro Kawamoto

Kazuyuki Sato

Masayoshi Kato

Mizuho Hiraoka

Makoto Fukatsu

Yohei Iwasaki

Shohei Fukuya

Akihito Saito

A toner comprising a toner particle that contains a binder resin, wherein the surface of the toner particle is covered with a resin A; the modulus of elasticity Ea of the resin A and the modulus of elasticity Eb of the binder resin satisfy the following formula:0.5&#x2264;()&#xd7;100&#x2264;50.0; andthe adhesion force Aof the toner particle is at least 500 nN when a probe having spherical SiOattached at the tip of a cantilever is pressed into the toner particle at 3 &#x3bc;N.

Toner

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

A novel fluorenylamine compound represented by a general formula below, where Rto Rare each independently selected from a hydrogen atom and alkyl groups; Rto Rare each independently selected from a hydrogen atom and the alkyl groups; and the alkyl groups are a methyl group, an ethyl group, a n-propyl group, an isopropyl group, a n-butyl group, an isobutyl group, a sec-butyl group, and a tert-butyl group. 

Fluorenylamine compound, organic light emitting device containing the same, material for organic light emitting device, display apparatus, and image input apparatus

A benzopyrene compound represented by a general formula [1] below, where one of Xand Xrepresents a substituted or unsubstituted aryl group; another one of Xand Xrepresents a hydrogen atom; R represents an alkyl group; and n represents 0 or 1.

Benzopyrene compound and organic light-emitting element containing the same

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.

The present invention provides an organic light emitting device which shows a blue light emission hue of remarkably good color purity and has a high-efficiency and high-luminance optical output. An organic light emitting device including an anode, a cathodeand an organic compound layer sandwiched between the anodeand the cathode, wherein at least one diindenopicene compound represented by general formula [1] described below is contained in the organic compound layer: 

Diindenopicene compound and organic light emitting device using the same

A novel phenanthroline compound is provided which is represented by the general formula [I]: (wherein R, R, R, R, Rand Rare the same or different and each is selected from a hydrogen atom, an unsubstituted or substituted alkyl group, an unsubstituted or substituted aralkyl group, an unsubstituted or substituted aryl group, an unsubstituted or substituted heterocyclic group, and a halogen atom; and Arand Arare the same or different and each is selected from an unsubstituted or substituted fluorenyl group, an unsubstituted or substituted fluoranthenyl group, an unsubstituted or substituted perylenyl group, and an unsubstituted or substituted carbazolyl group). An organic light emitting device using the phenanthroline compound is also provided that has a light output with a high efficiency and a high luminance and has a high long-term durability.

Phenanthroline compound and organic light emitting device using same

To provide a light-emitting device which can emit light with high luminance and high efficiency, and is excellent in durability. The light-emitting device includes an organic compound layer containing a phenanthroline compound represented by the general formula [I] and a carbonate.

Light-emitting device

A new condensed polycyclic compound represented by general formula [I]: wherein Ris hydrogen, halogen, cyano, a substituted amino or a group selected from the group consisting of alkyl, aralkyl, aryl, heterocyclic, each having no substituent or a substituent; and Arto Arare the same or different and are each independently a condensed polycyclic aromatic group or a condensed polycyclic heterocyclic group, each having no substituent or a substituent is used for an organic light-emitting device that is extremely efficient in a light output with high luminance and is extremely durable.

Condensed polycyclic compound and organic light-emitting device using the same

The present invention provides an oligofluorenylene compound represented by the general formula below, which enables production of an organic light-emitting device that exhibits an extremely pure luminescent hue and has a light emission of high efficiency, high brightness, and long lifetime. 

Oligofluorenlylene compounds

There is provided an organic light emitting device to break through the limit of 25% of internal quantum efficiency and 5% of external quantum efficiency while using singlet luminescence. Specifically provided is an organic light emitting device comprising an anode, an organic layer and a cathode, wherein light-emitting molecules present in an emissive layer which is at least a part of the organic layer and responsible for luminescence by charge injection effect transition from a triplet excited state having an energy level higher than a lowest excited singlet state to a singlet excited state and effect fluorescent emission in a fluorescence quantum yield of 60% or more in the same state as existing in the emissive layer, and wherein the emissive layer comprises the light-emitting molecules as a main component in an amount of 50 wt % or more, or is doped with the light-emitting molecules at a high concentration of 7 wt % or more, or is a layer in which the light-emitting molecules are excitable by direct trapping of electrons and holes has enabled to break through the limit of 25% of internal quantum efficiency and 5% of external quantum efficiency while using singlet luminescence.

Growing community of inventors

Kawasaki, Japan

Maki Okajima