摘要:
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 ETd of the dopant is larger than the triplet energy ETb of 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 ETb of the blocking layer is larger than ETh.
摘要:
An organic electroluminescence device includes: a cathode; an anode; and a single-layered or multilayered organic thin-film layer provided between the cathode and the anode. In the organic electroluminescence device, the organic thin-film layer includes at least one emitting layer, and the at least one emitting layer contains: at least one phosphorescent material; and a host material represented by the following formula (1). Ra—Ar1—Ar2—Rb (1)
摘要:
An organic electroluminescence device includes: a cathode; an anode; and a single-layered or multilayered organic thin-film layer provided between the cathode and the anode. In the organic electroluminescence device, the organic thin-film layer includes at least one emitting layer, and the at least one emitting layer contains: at least one phosphorescent material; and a host material represented by the following formula (1). Ra—Ar1—Ar2—Rb (1) In the formula, Ar1, Ar2, Ra and Rb each represent a substituted or unsubstituted benzene ring or a substituted or unsubstituted condensed aromatic hydrocarbon group selected from a group consisting of a naphthalene ring, a chrysene ring, a fluoranthene ring, a triphenylene ring, a phenanthrene ring, a benzophenanthrene ring, a dibenzophenanthrene ring, a benzotriphenylene ring, a benzochrysene ring, a picene ring and a benzo[b]fluoranthene ring.
摘要:
An organic electroluminescence device includes: a cathode; an anode; and a single-layered or multilayered organic thin-film layer provided between the cathode and the anode. In the organic electroluminescence device, the organic thin-film layer includes at least one emitting layer, and the at least one emitting layer contains: a host material represented by the following formula (1); and at least one phosphorescent material. Ra—Ar1—Ar2—Ar3—Rb (1) In the formula (1), Ra, Rb, Ar1, Ar2 and Ar3 each represent a substituted or unsubstituted benzene ring or a substituted or unsubstituted condensed aromatic hydrocarbon ring selected from a group consisting of a naphthalene ring, a chrysene ring, a fluoranthene ring, a triphenylene ring, a phenanthrene ring, a benzophenanthrene ring, a dibenzophenanthrene ring, a benzotriphenylene ring, a benzo[b]fluoranthene ring, a benzochrysene ring and a picene ring.When Ar2 represents a substituted or unsubstituted benzene ring, a substituted or unsubstituted 2,7-phenanthrenediyl group or a substituted or unsubstituted triphenylene ring, [Ra—Ar1—] and [Rb—Ar3—] are groups that are structured differently from each other.
摘要:
An organic electroluminescence device includes a pair of electrodes and an organic compound layer between the pair of electrodes. The organic compound layer includes an emitting layer including a host material and a phosphorescent dopant material. The host material is selected from a compound satisfying the following formula (1) with respect to a difference ΔST between singlet energy EgS and an energy gap Eg77K at 77K and satisfying the following formula (2) with respect to the singlet energy EgS. ΔST=EgS−Eg77K
摘要翻译:有机电致发光器件包括一对电极和一对电极之间的有机化合物层。 有机化合物层包括包含主体材料和磷光掺杂剂材料的发光层。 相对于单线态能量EgS,单线态能量EgS与77K的能隙Eg77K之间的差Dgr; ST,满足下式(2),选自满足下式(1)的化合物的主体材料。 &Dgr; ST = EgS-Eg77K <0.4(eV)(1)EgS≥2.90(eV)(2)
摘要:
An organic electroluminescence device includes: a cathode; an anode; and a single-layered or multilayered organic thin-film layer provided between the cathode and the anode. In the organic electroluminescence device, at least one layer of the organic thin-film layer includes: an organic-electroluminescence-device material represented by a general formula selected from the following formulae (1), (2) and (3); and at least one phosphorescent material. In the formula: A represents a group selected from a 3-fluoranthenyl group, 5-benzo[c]phenanthrenyl group, 6-benzo[c]phenanthrenyl group and 10-benzo[g]chrysenyl group; Ar represents a fused aromatic ring having 10 to 30 carbon atoms and having triplet energy of 2.10 eV or more; and A or Ar is allowed to be substituted by a phenyl group or a naphthyl group.
摘要:
A biscarbazole derivative of the invention is represented by a formula (1A) or (1B) below. In the formula (1A) or (1B): A1 represents a substituted or unsubstituted nitrogen-containing heterocyclic group having 1 to 30 ring carbon atoms; A2 represents a substituted or unsubstituted aromatic hydrocarbon group having 6 to 30 ring carbon atoms, or substituted or unsubstituted nitrogen-containing heterocyclic group having 1 to 30 ring carbon atoms; X1 and X2 each are a linking group; Y1 to Y4 each represent a substituent; p and q represent an integer of 1 to 4; and r and s represent an integer of 1 to 3.
摘要:
An organic electroluminescence device includes: an anode; a cathode; and at least hole transporting layer and emitting layer both provided between the anode and the cathode. The hole transporting layer contains a hole transporting material. The emitting layer is adjacent to the hole transporting layer, and contains a first host material, a second host material and a phosphorescent dopant material. An ionization potential IP(HT) of the hole transporting material, an ionization potential IP(h1) of the first host material and an ionization potential IP(h2) of the second host material satisfy a relationship represented by an expression (1) below. IP(h1)>IP(HT)>IP(h2) Expression (1)
摘要:
An organic electroluminescent device including an emitting layer, an electron-injecting controlling layer and an electron-transporting layer between an anode and a cathode in sequential order from the anode, bonding one to another, the emitting layer including a host material and a dopant, the ionization potential (Ips) of the main material forming the electron-injecting controlling layer and the ionization potential (Iph) of the host material of the emitting layer satisfying the following relationship (i), the electron mobility of the electron-transporting material forming the electron-transporting layer being 10−5 cm2/Vs or more at the electric field intensity of 400 to 500 (V/cm)1/2, and the affinity level (Af1) of the host material of the emitting layer, the affinity level (Af2) of the main material forming the electron-injecting controlling layer, and the affinity level (Af3) of the electron-transporting material forming the electron-transporting layer satisfying the following relationships (ii) and (iii). 0.5 eV>Ips−Iph≧0 eV (i) Af2−Af1>0 eV (ii) Af3−Af2>0.2 eV (iii)
摘要:
An organic electroluminescence device includes: a cathode; an anode; and an organic thin-film layer disposed between the cathode and the anode, the organic thin-film layer having one or more layers including an emitting layer, in which the emitting layer includes a first material represented by the following formula (1) and a second material in a form of a fluorescent dopant material.