Idemitsu Kosan Company, Limited

Hiromi Nakano

Takushi Shiomi

Toshinari Ogiwara

Hisato Matsumoto

Keiichi Yasukawa

Keiji Okinaka

Yuichi Nishimae

Shota Sawano

An organic EL device includes an emitting layer, a first layer adjacent to an anode-side of the emitting layer, and a second layer adjacent to a cathode-side thereof. The emitting layer contains first to third compounds. The first and second layers contain compounds of Formulae (1) and (2), respectively. The first and second compounds exhibits fluorescence and delayed fluorescence, respectively. Singlet energies Sof the first to third compounds satisfy S(M3)>S(M2)>S(M1). In Formula (1), Ra-Ra, Rb-Rband Rc-Rcare each a substituent, etc. In Formula (2), X-Xare each nitrogen atom, etc, Ar-Arare each a group of Formula (2A) or aryl group, etc, A is a group of Formula (2A) in which HAr is of Formula (2B), a is 1 to 5, Lis a linking group, etc. In Formula (2B), X-Xare each nitrogen atom, etc, and Yis oxygen, sulfur or nitrogen atom, etc,

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 may include partial structures of formula (3-11B) and (31a) in one molecule: Rbeing a single bond bonded to * in formula (31a), Rbeing independently H or a substituent, or at least one of adjacent pairs of Rare mutually bonded to form a ring, or Ris a single bond bonded to another atom/structure in the molecule, one or more Ris H, at least one of H being D, Yto Ybeing independently N, CR, or C bonded to another atom/structure in the molecule, 1 to 3 of Yto Ybeing N, and Rindependently being H or a substituent.

Organic electroluminescence element and electronic device

A compound is represented by a formula (1). In the formula (1), at least one combination of adjacent two or more of Rto Rare mutually bonded to form a ring represented by a formula (2), in which Rto Rand Rto Rare each independently a hydrogen atom, a substituent or the like,

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

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

A compound may include a partial structures of formula (3-1A), (32h), and (3-11B) in one molecule, Rto Rbeing independently H or a substituent, or adjacent pair(s) form a ring, at least one of Rto Ris a single bond to another atom/structure in the molecule, and one of Rto Ris a single bond to the partial structure of formula (32), Xis N bonded to the partial structure of formula (-A), Yto Yare independently CR, or C bonded to another atom/structure in the molecule, at least one of Yto Yis C bonded to the partial structure of formula (3-11B), Rare independently H or a substituent, or pair(s) of adjacent Rare bonded to form a ring, and at least one Ris independently a single bond to another atom/structure in the molecule.

An organic EL device includes an anode, a cathode, and an emitting layer interposed between the anode and the cathode, in which the emitting layer includes a delayed fluorescent compound M2 and a compound M3 represented by a formula (100), and a singlet energy S(M2) of the compound M2 and a singlet energy S(M3) of the compound M3 satisfy a numerical formula (Numerical Formula 1). In the formula (100), Xis an oxygen atom or a sulfur atom, Cis a carbon atom, Rto R, R, R, R, R, R, Rand Rto Rare each independently a hydrogen atom, substituent or the like, n is 1, 2, or 3. When Lis a single bond, n is 1, k is 1, 2, or 3, m is 2, 3, or 4, k+m=5, and Lis a single bond or linking group.

Organic electroluminescent element, compound, material for organic electroluminescent element, and electronic device

An organic EL device includes an anode, a cathode, and an emitting layer. The emitting layer contains a first compound represented by a formula (1X) or a formula (1Y), a second compound, and a third compound that exhibits delayed fluorescence. The second compound is different in structure from the first compound. The second compound is different in structure from the third compound. Singlet energies Sof the first, second, third compounds satisfy Numerical Formula 1 and Numerical Formula 2 below, A is, for example, a group represented by a formula (a1); Y˜Yare, for example, each independently a nitrogen atom or CRy; Ry is, for example, a substituent or a group represented by a formula (1Z); Rto Rare, for example, each independently a substituent or a group represented by a formula (1Z).

Organic electroluminescence device and electronic device

An organic electroluminescence device includes an anode, an emitting layer, and a cathode in this order. The emitting layer comprises a delayed fluorescent compound M2 and a compound M3 having at least one deuterium atom, and the compound M3 is not a compound having a partial structure represented by a formula (1C) or (2C). S(M2) of the compound M2 and S(M3) of the compound M3 satisfy a relationship of S(M3)>S(M2). In the formulae (1C) and (2C), Yto Yare each independently a N atom, CR, or a C atom bonded to another atom or the like in the compound M3, where each R is independently a H atom or a substituent, at least one of Yto Yis a N atom, and at least one of Yto Yis a C atom bonded to another atom or the like in the compound M3.

An organic electroluminescence device includes an anode, an emitting layer, and a cathode in this order. The emitting layer contains a compound, including a structure including a first partial structure of formula (3-100) and a second partial structure of formula (3-1A), mutually bonded in one molecule: In formula (3-100), Dto Dare each a deuterium atom, or one of Dto Dis a single bond to another atom/structure in the molecule, and remaining Dto Dare each a deuterium atom, and Ris a single bond bonded to the second partial structure. In formula (3-1A), one of Rto Ris a single bond bonded to the first partial structure, and remaining R301 to R306 not being bonded to the first partial structure are independently H, a substituent, or a single bond bonded to another atom/structure in the molecule.

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Sodegaura, Japan

Hiromi Nakano