Idemitsu Kosan Company, Limited

Other

Keio University

Akiyoshi Mikami

Idemitsu Koasn Co., Ltd.

Hitoshi Kuma

Chishio Hosokawa

Masahiro Kawamura

Toshinari Ogiwara

Yuichiro Kawamura

Hirokatsu Ito

Kenichi Fukuoka

Yukitoshi Jinde

Kazuki Nishimura

Satomi Tasaki

Kei Yoshida

Keiji Okinaka

Masakazu Funahashi

Mitsuru Eida

Tetsuya Masuda

Hiroyuki Saito

Tomoki Kato

Yumiko Mizuki

Yoshiaki Takahashi

Ryota Takahashi

Toshihiro Iwakuma

Hisayuki Kawamura

Takayasu Sado

Takashi Arakane

Sayaka Mizutani

Ryo Naraoka

Masato Nakamura

Hiroshi Yamamoto

Emiko Kambe

Masaki Numata

Satoshi Hachiya

Hiroshi Tokailin

Mineyuki Kubota

Hideaki Nagashima

Tomoharu Hayama

Kimihiro Yuasa

Keiko Yamamichi

Tetsuhiko Isobe

Hiroaki Toyoshima

Hiroyuki Iwabuchi

Ryo Kasuya

Aya Kawano

Junichi Katano

Masahiko Fukuda

Compounds of formulae (2-7) or (2-9) are provided: Also provided are organic electroluminescence (EL) devices containing the compounds having a high emission efficiency when operated at low voltage and a long lifetime and electronic devices including such organic EL devices.

Organic electroluminescent element and electronic device

A compound is represented by a formula (1) below, in which k is an integer of 0 or more, m is an integer of 1 or more, n is an integer of 2 or more. L is a substituted or unsubstituted aromatic hydrocarbon ring having 6 to 30 ring carbon atoms, CN is a cyano group, and Dand Dare each independently represented by one of a formula (2), a formula (3) and formula (3x) below, Dand Dbeing optionally mutually the same or different.

Compound, material for organic electroluminescent elements, organic electroluminescent element, and electronic device

The compound represented by formula (1): wherein A, B, R, and Rare as defined in the description,provides organic electroluminescence (EL) devices having a high emission efficiency when operated at low voltage and a long lifetime and electronic devices including such organic EL devices.

An organic electroluminescence device includes a first emitting unit, a first charge generating layer, a second emitting unit, a second charge generating layer, and a third emitting unit provided between an anode and a cathode in this order from the anode, in which the second charge generating layer includes an N layer close to the anode and a P layer close to the cathode, the third emitting layer contains a blue fluorescent compound, at least one of the first or second emitting layer contains a blue fluorescent compound, the third emitting unit includes a hole transporting zone between the second charge generating layer and the third emitting layer, the hole transporting zone is in contact with the second charge generating layer, and a thickness of the hole transporting zone is in a range from 5 nm to 40 nm and smaller than a thickness of the N layer.

Organic electroluminescent element and electronic device drivable at low voltage with improved lifetime

The compound represented by formula (1): wherein A, B, R, and Rare as defined in the description, provides organic electroluminescence (EL) devices having a high emission efficiency when operated at low voltage and a long lifetime and electronic devices including such organic EL devices.

A compound is represented by a formula (1) below, in which k is an integer of 0 or more, m is an integer of 1 or more, n is an integer of 2 or more. L is a substituted or unsubstituted aromatic hydrocarbon ring having 6 to 30 ring carbon atoms, CN is a cyano group, and Dand Dare each independently represented by one of a formula (2), a formula (3) and formula (3) below, Dand Dbeing optionally mutually the same or different. 

A composition contains a mixture of at least two compounds, the at least two compounds containing a first compound represented by a formula (1) and a second compound represented by a formula (2). In the formula (1), Rto R, Aand Ainclude five cyclic structures in total each represented by a formula (1a) below. In the formula (2), one of Aand Ais a substituent represented by a formula (2a), and the other thereof is represented by a formula (2b). 

Composition, organic-electroluminescence-device material, composition film, organic electroluminescence device, and electronic device

A compound is represented by a formula (1) below, in which k is an integer of 0 or more, m is an integer of 1 or more, n is an integer of 2 or more. L is a substituted or unsubstituted aromatic hydrocarbon ring having 6 to 30 ring carbon atoms, CN is a cyano group, and Dand Dare each independently represented by one of a formula (2), a formula (3) and formula (3x) below, Dand Dbeing optionally mutually the same or different. 

An organic electroluminescence device includes an anode, an emitting layer, an electron-transporting region, and a cathode, the anode, the emitting layer, the electron-transporting region, and the cathode being stacked in this order, the emitting layer including a host material, and a dopant material that emits fluorescence having a main peak wavelength of 550 nm or less, the electron-transporting region including a barrier layer that is adjacent to the emitting layer, and the barrier layer including a barrier material that includes an electron-transporting structural part, and a triplet barrier structural part that includes a fused polycyclic aromatic hydrocarbon compound, and satisfies the relationship 'E&#x3e;E' (where, Eis the triplet energy of the host material, and Eis the triplet energy of the barrier material).

Organic electroluminescence device

An organic electroluminescence device includes: an anode; a cathode; and a single- or multi-layer organic layer interposed between the anode and the cathode. The organic layer includes at least one emitting layer containing a dopant material represented by a formula below. In the formula, Xto Xeach independently represent CRor a nitrogen atom, at least one of Xto Xis a nitrogen atom, Lrepresents a divalent aromatic hydrocarbon group or a divalent heterocyclic group, A and B each independently represents a cyclic structure, at least one of the cyclic structure A and the cyclic structure B has a substituent, and Rrepresents an aryl group, alkyl group or the like. 

Organic electroluminescent element

An organic electroluminescence device includes an anode, a cathode and an emitting layer, in which the emitting layer includes a first compound and a second compound and each of the first compound and the second compound is a compound emitting thermally activated delayed fluorescence.

An organic electroluminescence device includes: an anode; a cathode; and an organic layer interposed between the anode and the cathode, in which the organic layer includes an emitting layer and the emitting layer includes a compound represented by a formula (1) below and a compound represented by a formula (2) below. Azof the formula (1) below and Azof the formula (2) below are each an azine ring. Cz of the formula (1) below and HAr of the formula (2) below are each a nitrogen-containing heterocyclic ring. 

An organic electroluminescence device including at least an anode, an emitting layer, an electron-transporting region and a cathode in sequential order, wherein the emitting layer contains a host and a dopant which gives fluorescent emission of which the main peak wavelength is 550 nm or less; the affinity Ad of the dopant is equal to or larger than the affinity Ah of the host; the triplet energy Eof the dopant is larger than the triplet energy Eof the host; and a blocking layer is provided within the electron-transporting region such that it is adjacent to the emitting layer, and the triplet energy Eof the blocking layer is larger than E.

Organic electroluminescent device

Growing community of inventors

Sodegaura, Japan

Hitoshi Kuma