Idemitsu Kosan Company, Limited

Keiichi Yasukawa

Toshinari Ogiwara

Takushi Shiomi

Hiromi Nakano

Keiji Okinaka

Shota Sawano

Hisato Matsumoto

Kazuki Nishimura

Kei Yoshida

Yuichiro Kawamura

Yukitoshi Jinde

Kei Yoshizaki

An emitting layer of an organic EL device contains a fluorescent first compound, a delayed fluorescent second compound, and a third compound that satisfy numerical formulae (Numerical Formula 1) to (Numerical Formula 4). (Numerical Formula 1): |Af(M1)−Af(M2)|≤0.40 eV, (Numerical Formula 2): Ip(M2)≥5.75 eV, (Numerical Formula 3): |Ip(M2)−Ip(M3)|≤0.25 eV, (Numerical Formula 4): S(M3)≥S(M2). Af(M1) is an affinity of the first compound, Af(M2) is an affinity of the second compound, Ip(M2) is an ionization potential of the second compound, S(M2) is a lowest singlet energy of the second compound, Ip(M3) is an ionization potential of the third compound, and S(M3) is a lowest singlet energy of the third compound.

Organic electroluminescent element and electronic device

An organic electroluminescence device includes an anode, a cathode, and an emitting layer disposed between the anode and the cathode. The emitting layer comprises a delayed fluorescent compound M2 having at least one deuterium atom and a compound M3 having at least one deuterium atom. A singlet energy S(M2) of the compound M2 and a singlet energy S(M3) of the compound M3 satisfy the relationship S(M3)>S(M2).

Organic electroluminescent element and electronic appliance

A compound of formula (11) to (13) wherein Rto Rare each independently Dof a formula (1-1) etc. or Dof a formula (2-1) etc. at least one of Rto Rbeing D, and at least one of Rto Rbeing D. In (1-1) and (2-1), Xis O or S, Rto Rand Rto Rare each independently H, a substituent etc. In at least one D, at least one of Rto Ris a group of a formula (110) or (120): Zis a C etc., a ring (B) is an aromatic hydrocarbon ring etc., Yto Yare each independently CRetc., Yto Yare each independently CRetc., Zis an aryl group etc., and * is a bonding position.

Compounds, materials for organic electroluminescent devices, organic electroluminescent devices, and electronic devices

A compound is represented by a formula (1). n is 2 to 4, m is 1 to 4, q is 0 to 3, and m+n+q=6; CN is a cyano group; Dis a group represented by a formula (2), (3) or (3X), the plurality of Dare the same; and Rx is a hydrogen atom or substituent. Rto Rare each independently a hydrogen atom or substituent. Rto Rand Rto Rare each independently a hydrogen atom or substituent; p, px and py are each independently 1 to 4; A to C are each independently a cyclic structure represented by a formula (131) or (132). Rand Rare each independently a hydrogen atom or substituent. Xis a sulfur atom or the like, and * represents a bonding position with a carbon atom of a benzene ring in the formula (1).

Compound, material for organic electroluminescent element, organic electroluminescent element, and electronic appliance

An organic electroluminescence device including: at least a first pixel and a blue pixel apposed on a substrate, in which the first pixel and the blue pixel each have an anode and a cathode, and the first pixel and the blue pixel have a first emitting layer and a blue emitting layer, respectively; a hole transporting zone provided between the first emitting layer and the anode and between the blue emitting layer and the anode; and an electron transporting zone provided between the first emitting layer and the cathode and between the blue emitting layer and the cathode, in which the first emitting layer includes a delayed fluorescent second compound and a fluorescent first compound capable of emitting light ranging from 500 nm to 660 nm, and the electron transporting zone includes: a first common layer; and an additional layer provided between the first emitting layer and the cathode.

Organic electroluminescence element, display device, and electronic apparatus

A compound is represented by one of formulae (11) to (13). Rto Reach independently represent a group represented by a formula (1-1), a group represented by a formula (2-1), a group represented by a formula (2-2) or the like. At least one of Rto Ris the group represented by the formula (1-1) or the like. At least one of Rto Ris the group represented by the formula (2-1), (2-2) or the like. For instance, in the formula (1-1), Rrepresents a substituent, and Rto Reach independently represent a hydrogen atom or a substituent. For instance, in the formulae (2-1) to (2-2), Rto Rand Rto Reach independently represent a hydrogen atom or a substituent. * each independently represents a bonding position to a carbon atom in a benzene ring in each of the formulae (11) to (13),

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

A compound is represented by one of formulae (11) to (13). Rto Reach independently represent a group represented by a formula (1-1) or the like, or a group represented by a formula (2-1), a group represented by a formula (2-2) or the like. At least one of Rto Ris the group represented by the formula (1-1) or the like. At least one of Rto Ris the group represented by the formula (2-1), (2-2) or the like. For instance, Xrepresents an oxygen atom, a sulfur atom, or CRR, Rto Rand Rand Reach independently representing a hydrogen atom or a substituent. For instance, Rto Rand Rand Reach independently represent a hydrogen atom or a substituent. * each independently represents a bonding position to a carbon atom in a benzene ring in each of formulae (11) to (13): 

Compound, material for organic electroluminescence element, organic electroluminescence 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. 

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Sodegaura, Japan

Keiichi Yasukawa