Idemitsu Kosan Company, Limited

Yukitoshi Jinde

Chishio Hosokawa

Toshinari Ogiwara

Yuichiro Kawamura

Hitoshi Kuma

Kazuki Nishimura

Kenichi Fukuoka

Masahiro Kawamura

Hiroyuki Saito

Toshihiro Iwakuma

Hirokatsu Ito

Tetsuya Inoue

Takayasu Sado

Takashi Arakane

Sayaka Mizutani

Masakazu Funahashi

Mitsunori Ito

Hiroshi Yamamoto

Yoriyuki Takashima

Toshio Sakai

Keiichi Yasukawa

Hisato Matsumoto

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 a pair of electrodes and an organic compound layer interposed therebetween. The organic compound layer includes a plurality of emitting layers at least including a first emitting layer and a second emitting layer. The first emitting layer contains a first host material and a fluorescent first luminescent material. The second emitting layer contains a second luminescent material that is different from the first luminescent material. A difference &#x394;ST(H1) between singlet energy EgS(H1) of the first host material and an energy gap Eg(H1) at 77[K] of the first host material satisfies a specific relationship. One of the first luminescent material and the second luminescent material has a main peak wavelength from 400 nm to less than 500 nm and the other of the first luminescent material and the second luminescent material has a main peak wavelength from 500 nm to 700 nm.

Organic electroluminescent element

An organic electroluminescence device including at least an anode, an emitting layer, an electron-transporting region and a cathode in sequential order, wherein the emitting layer contains a host and a dopant which gives fluorescent emission of which the main peak wavelength is 550 nm or less; the affinity Ad of the dopant is equal to or larger than the affinity Ah of the host; the triplet energy Eof the dopant is larger than the triplet energy Eof the host; and a blocking layer is provided within the electron-transporting region such that it is adjacent to the emitting layer, and the triplet energy Eof the blocking layer is larger than E.

Organic electroluminescent device

An organic electroluminescence device that includes an anode, an emitting layer that includes a host and a fluorescent dopant, an electron transporting zone, a cathode, a blocking layer adjacent to the emitting layer in the electron transporting zone where the blocking layer includes an aromatic heterocyclic derivative with an azine ring and where the triplet energy E(eV) of the aromatic heterocyclic derivative is larger than a triplet energy E(eV) of the host.

Organic electroluminescence device

An organic electroluminescence device including: an anode (), a cathode (), an emitting layer () including an organic compound, which is between the anode () and the cathode (), two or more layers arranged in a hole injection and transport region which is between the anode () and the emitting layer (), and one or more layers arranged in an electron injection and transport region which is between the emitting layer () and the cathode (), wherein a layer in the hole injection and transport region, which is in contact with the emitting layer (), includes an aromatic amine derivative having a carbazole skeleton, one of the layers other than the layer in contact with the emitting layer () in the hole injection and transport region includes one or more materials selected from the group consisting of thiophene derivatives, tricyclic or more cyclic fused aromatic derivatives, amine derivatives excluding the compound represented by the following formula (A), conductive polymers, CF, CuPc, transition metal oxides, fullerenes and acceptor materials, and a layer in the electron injection and transport region includes a benzimidazole derivative. 

An organic electroluminescence device including an anode, an emitting layer, a blocking layer, an electron-injecting layer and a cathode in sequential order; wherein the emitting layer contains a host and a dopant which gives fluorescent emission of which the main peak wavelength is 550 nm or less; the affinity Ad of the dopant is smaller than the affinity Ah of the host; the triplet energy Eof the dopant is larger than the triplet energy Eof the host; the triplet energy Eof the blocking layer is larger than E; and the blocking layer includes an aromatic hydrocarbon compound.

An organic electroluminescence device that includes an anode, an emitting layer that includes a host and a dopant, a blocking layer, an electron injecting layer, and a cathode where the blocking layer includes an aromatic heterocyclic derivative, the triplet energy E(eV) of the blocking layer is larger than a triplet energy E(eV) of the host, and the affinity A(eV) of the blocking layer and an affinity A(eV) of the electron injecting layer satisfy a relationship of A&#x2212;A&#x3c;0.2.

An organic electroluminescence device includes a pair of electrodes and an organic compound layer interposed therebetween. The organic compound layer includes a plurality of emitting layers including a first emitting layer and a second emitting layer, in which at least one of the first and second emitting layers contains a phosphorescent dopant material, and a space layer between the first and second emitting layers. The space layer contains a compound satisfying a relationship of the following numerical formula (1) in terms of a difference &#x394;ST between singlet energy EgS and an energy gap Egat 77K,[Numerical Formula 1]&#x394;&#x2266;0.5 (eV)&#x2003;&#x2003;(1).

An organic electroluminescence device includes an anode, a cathode and layers between the anode and the cathode, the layers at least including a hole transporting layer, a first emitting layer, a second emitting layer and an electron transporting layer, in which the first emitting layer includes a first host material and a first luminescent material and the second emitting layer is continuously formed on the first emitting layer near the cathode and includes a second host material and a second luminescent material. The second host material is a monoazine derivative, a diazine derivative, or a triazine derivative. The first and second luminescent materials are different metal complexes.

An organic EL device includes: an anode for injecting holes; a phosphorescent-emitting layer; a fluorescent-emitting layer; and a cathode for injecting electrons. The phosphorescent-emitting layer contains a phosphorescent host and a phosphorescent dopant for phosphorescent emission. The fluorescent-emitting layer contains a fluorescent host and a fluorescent dopant for fluorescent emission. The fluorescent host is at least one of an asymmetric anthracene derivative represented by a formula (1) below and a pyrene derivative represented by a formula (2) below. 

Organic EL device and anthracene derivative

Provided is an organic electroluminescence device, including: an anode; a cathode; and organic thin film layers provided between the anode and the cathode, in which: the organic thin film layers have a light emitting layer, and have a hole injecting layer and a hole transporting layer, or a hole injecting/transporting layer on a side which is closer to the anode than the light emitting layer is; the hole injecting layer or the hole injecting/transporting layer contains an aromatic amine derivative having a specific substituent, and the hole transporting layer or the hole injecting/transporting layer contains an aromatic amine derivative having a specific substituent.

A chrysene derivative shown by the following formula: wherein Rto Rand Rto Rare independently a hydrogen atom, a substituted or unsubstituted alkyl group having 1 to 10 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 10 ring carbon atoms, a substituted or unsubstituted alkylsilyl group having 3 to 20 carbon atoms, a substituted or unsubstituted arylsilyl group having 8 to 30 carbon atoms, or a substituted or unsubstituted aryl group having 6 to 20 ring carbon atoms, provided that at least one of Rto Ris a substituted or unsubstituted fused aromatic ring group having 10 to 20 ring carbon atoms or a substituted or unsubstituted fluorenyl group.

Chrysene derivative and organic electroluminescent device using the same

A phosphorescent-emitting layer contains a phosphorescent host and a phosphorescent dopant for providing phosphorescence, and a fluorescent-emitting layer contains a fluorescent host and a fluorescent dopant for providing fluorescence. A charge blocking layer blocks electrons injected into the fluorescent host of the fluorescent-emitting layer from being injected toward the charge blocking layer from the fluorescent-emitting layer, and also injects holes into the fluorescent-emitting layer from the phosphorescent-emitting layer. A triplet energy gap Egof the phosphorescent dopant of the phosphorescent-emitting layer, a triplet energy gap Egof the charge blocking layer and a triplet energy gap Egof the fluorescent host of the fluorescent-emitting layer satisfy the following formula (1).Eg&#x3c;Eg&#x2266;Eg&#x2003;&#x2003;(1)

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Sodegaura, Japan

Yukitoshi Jinde