Idemitsu Kosan Company, Limited

Kei Yoshizaki

Toshinari Ogiwara

Yuichiro Kawamura

Kei Yoshida

Masatoshi Saito

Ryota Takahashi

Keiichi Yasukawa

An organic electroluminescence device includes: an anode; an emitting layer; and a cathode. The emitting layer contains a first compound and a second compound, the first compound being a delayed fluorescent compound, the second compound being a compound represented by a formula (2).

Organic electroluminescence element and electronic device

A compound is represented by a formula (20) below. In the formula (20), a least one pair of a pair of Xand X, a pair of Xand Xand a pair of Xand Xare carbon atoms to be bonded to the structure represented by the formula (20a), 

Compound, composition, organic electroluminescent element, and electronic appliance

An organic electroluminescence device includes an anode, an emitting layer, and a cathode, in which the emitting layer contains a first compound represented by a formula (1) and a fluorescent second compound. A singlet energy S(M1) of the first compound is larger than a singlet energy S(FL) of the fluorescent second compound. A is a group represented by a formula (1). 

Organic electroluminescent element, electronic device, and compound

A compound is represented by a formula (2) below. In the formula (2), at least one pair of a pair of Xand X, a pair of Xand X, a pair of Xand X, a pair of Xand X, a pair of Xand X, a pair of Xand X, a pair of Xand X, a pair of Xand X, a pair of Xand X, and a pair of Xand Xare carbon atoms to be bonded to a structure represented by as formula (2a) or (2b) below, 

Compound, composition, organic electroluminescent element and electronic device

An organic electroluminescence device includes an anode, a second organic layer, a first organic layer, and a cathode in this order. The first organic layer contains a first compound and a second compound. The second organic layer contains a third compound. The first compound is a compound represented by a formula (1). The second compound is a delayed fluorescent compound. The third compound is a compound represented by a formula (3). In the formula (1), X is a nitrogen atom or a carbon atom bonded to Y, Y being a hydrogen atom or a substituent. In the formula (3), n is an integer ranging from 1 to 4, Xis a group represented by a formula (3A). In the formula (3A), Arand Arare each independently a monovalent or polyvalent aromatic hydrocarbon group, and Cz is a group represented by a formula (3B-1) or the like. 

Organic electroluminescence device and electronic device

An organic electroluminescence device includes an anode, an emitting layer, and a cathode. The emitting layer contains a first compound, a second compound, and a third compound. An ionization potential Ip1 of the first compound and an ionization potential Ip2 of the second compound satisfy the numerical expression.0&#x2264;2&#x2212;1&#x2264;0.8[] The first compound is a delayed fluorescent compound. The second compound is a fluorescent compound. The third compound has an electron mobility of 1&#xd7;10cm/(V&#xb7;s) or more.

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Sodegaura, Japan

Kei Yoshizaki