Idemitsu Kosan Company, Limited

Joled Inc.

Hiroaki Toyoshima

Kazuki Nishimura

Masato Nakamura

Satomi Tasaki

Emiko Kambe

Masakazu Funahashi

Yuki Nakano

Hitoshi Kuma

Tasuku Haketa

Tadahiko Yoshinaga

Tetsuya Masuda

Hironori Kawakami

Yusuke Takahashi

Ryoji Maeda

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

An organic electroluminescence device includes: an emitting region provided between a cathode and an anode; and a hole transporting zone provided between the anode and the emitting region, in which the hole transporting zone includes at least a first anode side organic layer and a second anode side organic layer, the first anode side organic layer is in direct contact with the second anode side organic layer, a total film thickness of the hole transporting zone is in a range from 20 nm to 80 nm, the first anode side organic layer contains no compound contained in the second anode side organic layer, the first anode side organic layer contains a first organic material and a second organic material, the first organic material is different from the second organic material, and a content of the first organic material in the first anode side organic layer is less than 50 mass %.

Organic electroluminescence device, light emitting device, organic electroluminescence display device and electronic device

An organic electroluminescence device includes two or more emitting units disposed between an anode and a cathode, and an intermediate layer, in which the intermediate layer contains a phenanthroline compound, the laminated emitting unit includes a first emitting layer containing a first host material and a second emitting layer containing a second host material, and a triplet energy T(H1) of the first host material and a triplet energy T(H2) of the second host material satisfy a relationship of a numerical formula (Numerical Formula 3),(1)&#x3e;(2)&#x2003;&#x2003;(Numerical Formula 3).

Organic electroluminescent element and electronic device

An organic electroluminescence device includes: a first emitting layer disposed between an anode and a cathode; a second emitting layer disposed between the first emitting layer and the cathode; and an electron blocking layer disposed between the first emitting layer and the anode, in which the first emitting layer and the second emitting layer are in direct contact with each other; the first emitting layer and the electron blocking layer are in direct contact with each other; the first emitting layer includes a first compound represented by a formula (1) below; the first compound includes at least one group represented by a formula (11) below; the second emitting layer includes a second compound represented by a formula (2); the electron blocking layer includes a third compound; and the third compound satisfies a formula (M1) below. 

Organic electroluminescent element emitting light at high luminous effiency and electronic device

An organic electroluminescence composition including two or more compounds each having a specific structure combining a hole transporting ability and an electron transporting ability; an organic electroluminescence composition including one or more compounds each having a specific structure combining a hole transporting ability and an electron transporting ability and a different compound having an electron transporting skeleton; and a material for organic electroluminescence devices, a solution of a material for organic electroluminescence devices and an organic electroluminescence device, each including the aromatic heterocyclic derivative.

Organic electroluminescence composition, material for organic electroluminescence element, solution of material for organic electroluminescence element, and organic electroluminescence element

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Sodegaura, Japan

Hiroaki Toyoshima