摘要:
Disclosed is a highly efficient organic EL device wherein color adjustment for obtaining white emission is easy. Specifically disclosed is an organic electroluminescent device (10) comprising at least an anode layer (1), an organic light-emitting layer and a cathode layer (6) stacked on top of one another in this order wherein the organic light-emitting layer has a multilayer structure including at least a first light-emitting layer (3) containing a fluorescent dopant and a second light-emitting layer (4) containing a phosphorescent dopant.
摘要:
Disclosed is a fluorene derivative having a specific structure. Also disclosed is an organic electroluminescent device having high luminous efficiency wherein an organic thin film layer composed of one or more layers including at least a light-emitting layer is interposed between a cathode and an anode. At least one layer of the organic thin film layer contains the fluorene derivative of the specific structure alone or as a component of a mixture. Such an organic electroluminescent device with high luminous efficiency can be realized by this fluorene derivative.
摘要:
A biscarbazole derivative having a specific group, which is represented by formula (1): and an organic electroluminescence device in which a plurality of organic thin-film layers including a light emitting layer are disposed between a cathode and an anode, and at least one of the organic thin-film layers include the biscarbazole derivative. The organic electroluminescence device exhibits high emission efficiency and has a long lifetime. In formula (1), each of A 1 and A 2 independently represents a substituted or unsubstituted aromatic hydrocarbon group having 6 to 30 ring carbon atoms; each of Y 1 to Y 16 independently represents C(R) or a nitrogen atom; each of R groups independently represents a hydrogen atom, etc. and each of L 1 and L 2 independently represents a single bond, etc.; provided that at least one of A 1 , A 2 and R represents a substituted or unsubstituted fluoranthenyl group, etc.
摘要:
A fused-ring-containing compound comprising: a fused bicyclic group of a specific structure; and a carbazolyl group or analogue thereof and/or an indolyl group or analogue thereof. Also provided is an organic electroluminescent element which comprises a cathode, an anode, and an organic thin film sandwiched therebetween which comprises one or more layers at least including a luminescent layer, wherein at least one layer of the organic thin film consists of the fused-ring-containing compound alone or contains the compound as a component of a mixture. This organic electroluminescent element has a high luminescent efficiency and high heat resistance and has an extremely long life.
摘要:
Disclosed is an organic electroluminescent device (10) comprising an anode (1), a first light-emitting layer (3), a charge blocking layer (4), a second light-emitting layer (5) and a cathode (7) sequentially arranged in this order. The first light-emitting layer (3) and the second light-emitting layer (5) respectively contain a host material and a dopant, and the energy gap of the host material of the first light-emitting layer (3) is smaller than the energy gap of the host material of the second light-emitting layer (5). The host material of the first light-emitting layer (3) is a hole transporting material, while the host material of thesecond light-emitting layer (5) is an electron transporting material. The affinity level of the charge blocking layer (4) is lower than the affinity level of the host material of the second light-emitting layer (5) by 0.2 eV or more, and the ionization potential (Ie1) of the charge blocking layer (4) and the ionization potential (Ih1) of the host material of the first light-emitting layer (3) satisfy the following relation (1). Ie1
摘要:
A material for organic electroluminescence (EL) device, comprising a compound of specified structure having a nitrogenous ring. Further, there is provided an organic EL device comprising a negative electrode and a positive electrode and, interposed therebetween, one or two or more organic thin-film layers including at least a light emitting layer, wherein at least one of the organic thin-film layers contains the above material for organic EL device. Thus, there become available a material for organic EL device capable of realizing high luminous efficiency and thermostability and prolonged service life and further an organic EL device utilizing the material.