Idemitsu Kosan Company, Limited

Ryohei Hashimoto

Kei Yoshida

Toshinari Ogiwara

Toshihiro Iwakuma

Yumiko Mizuki

Hideaki Nagashima

Yuki Nakano

Yuichiro Kawamura

Masatoshi Saito

Takushi Shiomi

An organic electroluminescence device includes: an anode; an emitting layer; and a cathode, the emitting layer containing a first material, a second material and a third material, the first material being a fluorescent material, the second material being a delayed fluorescent material, the third material having a singlet energy larger than a singlet energy of the second material.

Organic electroluminescent element and electronic device

An organic electroluminescence device includes an anode, an emitting layer, and a cathode, the emitting layer including a delayed-fluorescent first compound represented by a formula (1), and a fluorescent second compound. In the formula (1), Aris a substituted or unsubstituted aryl group having 6 to 30 ring carbon atoms and the like, and Aris a substituted or unsubstituted heteroaryl group having 5 to 30 ring atoms and including one or more nitrogen atom in the ring, or an aryl group having 6 to 30 ring carbon atoms and substituted by one or more cyano group, at least one of Arand Arbeing at least one group selected from the group consisting of groups represented by a formula (1a) and the like. 

Organic electroluminescent element, electronic device and compound

A compound that includes a structure including two or more structures represented by the following formula (1) in the same molecule and in which at least two of the structures represented by the formula (1) are directly bonded to each other by a single bond. 

Compound and organic electroluminescent device using same

A compound represented by the following formula (1). In the formula, Ais O, S, Si(Ar)(Ar), P(&#x2550;O)(Ar)(Ar), a substituted or unsubstituted arylene group including 6 to 30 ring carbon atoms, or a substituted or unsubstituted heteroarylene group including 5 to 30 ring atoms. 

Fused heterocyclic aromatic derivative, organic electroluminescence element material, and organic electroluminescence element using same

A compound represented by the following formula (1). In the formula (1), when Arand Arare the same substituents, as for all of the following pairs: Yand Y, Yand Y, Yand Y, Yand Y, Yand Y, and Yand Y, Yto Yof each pair are not the same as each other. 

Ladder compound, and organic electroluminescent element using same

An organic electroluminescence device includes an anode, an emitting layer and a cathode, in which the emitting layer includes a first compound, a second compound and a third compound. The first compound is a delayed fluorescent compound. The first compound has an energy gap Tat 77 [K] larger than an energy gap Tat 77 [K] of the second compound. The third compound has an energy gap Tat 77 [K] larger than the energy gap Tat 77 [K] of the second compound. The second compound has a fused ring structure represented by a formula (2) below and has eight or less rings in total. 

Organic electroluminescence device and electronic device

A compound represented by the following formula (1). 

Amine compound having hetero-fused ring and organic electroluminescent element using amine compound

A nitrogen-containing heteroaromatic compound is represented by the following formula (A). wherein Y is an oxygen atom or a sulfur atom, M is a substituted or unsubstituted nitrogen-containing heteroaromatic group, and Aris a substituted aromatic hydrocarbon group having 6 to 18 ring carbon atoms, a substituted or unsubstituted monocyclic heteroaromatic group having 5 or 6 ring atoms, a dibenzofuran ring group that may be substituted with a substituent (excluding a 3-carbazolyl group and an N-carbazolyl group), a dibenzothiophene ring group that may be substituted with a substituent (excluding a 3-carbazolyl group and an N-carbazolyl group), or a nitrogen-containing polycyclic group among nitrogen-containing polycyclic groups respectively represented by the following formulas (1) to (5). 

Nitrogen-containing heteroaromatic ring compound

Material for organic electroluminescent element and organic electroluminescent element using same

An organic electroluminescence device including two or more organic thin film layers including an emitting layer between an anode and a cathode, 

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Sodegaura, Japan

Ryohei Hashimoto