摘要:
An organic electroluminescent device (1) including: an anode (10) and a cathode (30), and an emitting layer (20) including an anode-side region (22), an internal region (24) and cathode-side region (26) provided between the anode (10) and the cathode (30); each of the regions (22), (24) and (26) including a host compound of an organic material and a dopant of a metal complex containing a heavy metal and exhibiting light emitting properties originated from a triplet state; the dopant concentration of the internal region (24) being higher than the dopant concentrations of the anode-side region (22) and the dopant concentration of the cathode-side region (24).
摘要:
A material for organic electroluminescence devices comprising a compound having a specific structure and an organic electroluminescence device comprising an organic thin film layer which comprises one layer or a plurality of layers comprising at least a light emitting layer and disposed between a cathode and an anode, wherein at least one layer in the organic thin film layer comprises the material for organic electroluminescence devices, are provided. The material provides the organic electroluminescence device exhibiting a great efficiency of light emission, having no defect pixels, exhibiting excellent heat resistance and having a long life.
摘要:
An organic electroluminescent device (1) comprising: an anode (20), a cathode (70) and a plurality of layers comprising at least a hole-injecting-transporting layer (30) in contact with the anode (20) and an emitting layer. (40), the plurality of layers being provided between the anode (20) and the cathode (70), a difference in ionization potential between the hole-injecting-transporting layer (30) and the anode (20) being more than 0.7 eV.
摘要:
An organic electroluminescent device (1) including an anode (2), a cathode (6), and at least a first layer (3), a second layer (4), and a third layer (5) provided between the anode (2) and the cathode (6) in that order from the anode side. At least one of the first to third layers (3), (4), and (5) includes a phosphorescent compound. At least one of the first to third layers (3), (4), and (5) is an emitting layer. At least three compounds respectively forming the first layer (3), the second layer (4), and the third layer (5) other than the phosphorescent compound are compounds of the following formula (1). wherein R1 to R7 each represent a hydrogen atom or a substituent, provided that adjacent substituents may form a ring.
摘要:
An organic electroluminescent device (1) including an anode (2), a cathode (6), and at least a first layer (3), a second layer (4), and a third layer (5) provided between the anode (2) and the cathode (6). At least one of the first to third layers (3), (4), and (5) includes a phosphorescent compound, and at least one of the first to third layers (3), (4), and (5) is an emitting layer. Compounds respectively forming the first to third layers (3), (4), and (5) and having the largest ionization potentials of the respective layers have an ionization potential of 5.7 eV or more and differ in the ionization potential in an amount of less than 1.0 eV.
摘要:
A novel aromatic compound having an anthracene skeleton structure and an asymmetric molecular structure; and an organic electroluminescence device which comprises a cathode, an anode and an organic thin film layer comprising at least one layer containing a light emitting layer and sandwiched between the cathode and the anode in which at least one layer in the organic thin film layer contains the above novel aromatic compound singly or as a component of a mixture. The organic electroluminescence device exhibits a great luminance of emitted light, a great efficiency of light emission and a high purity of color, emits bluish light, is excellent in stability at high temperatures and has a long life. The organic electroluminescence device can be provided by utilizing the novel aromatic compound.
摘要:
A material for organic electroluminescence devices comprising a compound in which a heterocyclic group having nitrogen is bonded to an arylcarbazolyl group or a carbazolylalkylene group and an organic electroluminescence device comprising an anode, a cathode and an organic thin film layer comprising at least one layer and disposed between the anode and the cathode, wherein at least one layer in the organic thin film layer comprises the material for organic electroluminescence devices described above. The material can provide an organic electro-luminescence device emitting bluish light with a high purity of color. The organic electroluminescence device uses the material.
摘要:
A luminescent ink composition for an organic EL device which can form thin films by a wet process easily due to a high solubility of a low-molecular material is provided in order to form an organic thin film containing a luminescent low-molecular material by a wet method with a high productivity. A luminescent ink composition for an organic electroluminescent device comprising: (A) an anthracene derivative represented by the following formula (1); (B) a condensed aromatic ring compound substituted with an arylamino group and/or a styryl derivative substituted with an arylamino group; and (C) an organic solvent.
摘要:
A novel compound having a spiro bond with a specific structure, a material for forming a luminous coated film comprising the compound having the spiro bond with the specific structure, and an organic electroluminescence device which comprises at least one organic thin film layer sandwiched between a pair of electrode consisting of an anode and a cathode, wherein the organic thin film layer comprises the compound having the spiro bond. The organic EL device employing either the compound having a spiro bond or the material for forming luminous coated film in accordance with the present invention is superior in heat resistance, has stability of the thin film composing the device, emits uniform blue light, and exhibits an excellent luminance, current efficiency even under a low driving voltage.
摘要:
A material for organic electroluminescence devices comprising a compound in which a heterocyclic group having nitrogen is bonded to an arylcarbazolyl group or a carbazolylalkylene group and an organic electroluminescence device comprising an anode, a cathode and an organic thin film layer comprising at least one layer and disposed between the anode and the cathode, wherein at least one layer in the organic thin film layer comprises the material for organic electroluminescence devices described above. The material can provide an organic electro-luminescence device emitting bluish light with a high purity of color. The organic electroluminescence device uses the material.