摘要:
Disclosed is an organic electroluminescent device (organic EL device) which is improved in luminous efficiency, fully secured of driving stability, and of simple constitution. Also disclosed is a compound useful for the fabrication of said organic EL device. The organic electroluminescent device comprises organic layers including a light-emitting layer disposed between an anode and a cathode which are piled one upon another on a substrate and at least one of said organic layers comprises a compound for an organic EL device represented by general formula (1). Said organic layer is preferably a light-emitting layer containing a phosphorescent dopant. In general formula (1), X is a substituted or unsubstituted methine group or a nitrogen, Ar4 to Ar7 each is a substituted or unsubstituted aromatic hydrocarbon group or a substituted or unsubstituted aromatic heterocyclic group, and Ar4, Ar5 and the nitrogen to which Ar4 and Ar5 are joined or Ar6, Ar7 and the nitrogen to which Ar6 and Ar7 are joined may together form a nitrogen-containing heterocyclic ring.
摘要:
This invention relates to a highly reliable material for an organic electroluminescent element exhibiting high luminance, high luminous efficiency, little deterioration in emission, and suitability for use and storage at high temperatures and to an organic electroluminescent element using said material. The material is a diaminodibenzodioxin derivative represented by general formula (1) wherein Ar1, Ar2, Ar3, and Ar4 are substituted or unsubstituted aryl groups and Ar1, Ar2, and the nitrogen atom bonded thereto or Ar3, Ar4, and the nitrogen atom bonded thereto may form a nitrogen-containing heterocyclic ring; and this diaminodibenzodioxin derivative may be incorporated in the light-emitting layer, the hole-transporting layer, or the hole-injecting layer of an organic electroluminescent element.
摘要:
This invention relates to a highly reliable material for an organic electroluminescent element exhibiting high luminance, high luminous efficiency, little deterioration in emission, and suitability for use and storage at high temperatures and to an organic electroluminescent element using said material. The material is a diaminodibenzodioxin derivative represented by general formula (1) wherein Ar1, Ar2, Ar3, and Ar4 are substituted or unsubstituted aryl groups and Ar1, Ar2, and the nitrogen atom bonded thereto or Ar3, Ar4, and the nitrogen atom bonded thereto may form a nitrogen-containing heterocyclic ring; and this diaminodibenzodioxin derivative may be incorporated in the light-emitting layer, the hole-transporting layer, or the hole-injecting layer of an organic electroluminescent element.
摘要:
Provided is an organic electroluminescent device (organic EL device), which has improved luminous efficiency, shows sufficiently ensured driving stability, and has a simple construction. The organic electroluminescent device includes an anode, a cathode, and organic layers including a hole-transporting layer and a light-emitting layer, the organic layers being interposed between the anode and the cathode, in which the light-emitting layer contains a phosphorescent light-emitting material and the hole-transporting layer and the light-emitting layer have an electron- and/or exciton-blocking layer therebetween, the electron- and/or exciton-blocking layer being adjacent to the light-emitting layer and containing an indolocarbazole compound represented by the general formula (2). In the formula, a ring B represents a heterocycle represented by the formula (1c) to be fused with adjacent rings, Z represents an n-valent aromatic hydrocarbon group or an aromatic heterocyclic group, and n represents 1 or 2.
摘要:
Disclosed is an organic electroluminescent device (organic EL device) which is improved in luminous efficiency, sufficiently secures driving stability, and has a simple configuration. The organic EL device of this invention comprises a light-emitting layer between an anode and a cathode piled one upon another on a substrate and the light-emitting layer contains a phosphorescent dopant and an unsymmetrical indolocarbazole compound as a host material. The unsymmetrical indolocarbazole compound has a structure in which two or more groups having an indolocarbazole structure are linked together by a linking group and at least one of the groups has an isomeric indolocarbazole skeleton different from those of the other groups. Examples of the unsymmetrical indolocarbazole compound include compounds represented by the following formula (2) wherein A is a substituent, each of R1 to R3 is a hydrogen atom or a substituent, and L is a linking group composed of an aromatic group.
摘要:
Provided are a novel chalcogen-containing aromatic compound and an organic electronic device using the compound. This compound is a chalcogen-containing aromatic compound represented by the formula (1). Among the organic electronic devices each using this chalcogen-containing aromatic compound are an organic EL device, an organic TFT device, a photovoltaic device, and the like. In the formula (1): X represents oxygen, sulfur, or selenium; A represents an alkyl group, a cycloalkyl group, an alkenyl group, an alkynyl group, an aromatic hydrocarbon group, an aromatic heterocyclic group, or an amino group; and n's each independently represent an integer of 0 to 2, provided that a sum of two n's is 1 to 4.
摘要:
Provided is an organic electroluminescent device (organic EL device) which has improved luminous efficiency and a simple configuration, while ensuring sufficient driving stability. This organic electroluminescent device includes a light-emitting layer between an anode and a cathode that are laminated on a substrate. The light-emitting layer contains a phosphorescent light-emitting dopant, and a carbazole compound represented by the following formula (1) as a host material. In the formula (1), E represents oxygen or sulfur, and R1 to R6 each represent hydrogen, an alkyl group, a cycloalkyl group, or an aromatic group represented by the formula (2). In the formula (2), X represents CR9 or nitrogen.
摘要:
Disclosed is an organic electroluminescent device (organic EL device) that is improved in the luminous efficiency, fully secured of the driving stability, and of a simple structure and disclosed also is a compound useful therefor. The organic EL device comprises a light-emitting layer disposed between an anode and a cathode piled one upon another on a substrate and the said light-emitting layer comprises a phosphorescent dopant and an indolocarbazole derivative as a host material. The indolocarbazole derivative is represented by the following formula (3) wherein Ar is an aromatic group and L is a direct bond or an aromatic group.
摘要:
Provided are a novel chalcogen-containing aromatic compound and an organic electronic device using the compound. This compound is a chalcogen-containing aromatic compound represented by the formula (1). Among the organic electronic devices each using this chalcogen-containing aromatic compound are an organic EL device, an organic TFT device, a photovoltaic device, and the like. In the formula (1): X represents oxygen, sulfur, or selenium; A represents an alkyl group, a cycloalkyl group, an alkenyl group, an alkynyl group, an aromatic hydrocarbon group, an aromatic heterocyclic group, or an amino group; and n's each independently represent an integer of 0 to 2, provided that a sum of two n's is 1 to 4.
摘要:
Disclosed is an organic electroluminescent device (organic EL device) that is improved in luminous efficiency, sufficiently secures driving stability, and has a simple configuration. This organic EL device comprises organic layers between an anode and a cathode piled one upon another on a substrate and at least one organic layer selected from a light-emitting layer, a hole-transporting layer, an electron-transporting layer, and a hole-blocking layer contains a carbazole compound represented by the following formula (1). In the case where the light-emitting layer of the organic electroluminescent device contains a phosphorescent dopant and a host material, it is the carbazole compound that is contained as the host material. In formula (1), X is C—Y or a nitrogen atom; Y is a hydrogen atom, an alkyl group, a cycloalkyl group, or an aromatic group; n is an integer of 2 to 4: A is an n-valent aromatic group; L is a direct bond or a divalent aromatic group; and R is a hydrogen atom, an alkyl group, or a cycloalkyl group.