Abstract:
PROBLEM TO BE SOLVED: To obtain an anthracene derivative useful as an organic electroluminescent element having high luminous efficiency and high life characteristics. SOLUTION: The anthracene derivative is represented by general formula (1) (X 1 and X 2 are each a 6-28C arylene group or a substituted or nonsubstituted 5-21C bifunctional heterocyclic group; A, B, C and D are each a 1-20C alkyl group, a 6-28C aryl group or a 5-21C heterocyclic group and A and B, C and D are mutually bonded to form rings; Y 1 and Y 2 are each H, a 1-20C alkyl group or a 1-20C alkoxy group). COPYRIGHT: (C)2006,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To obtain a phosphorescent material which can emit a blue light at high efficiency, to provide an organic electroluminescent element containing the material in its luminescent layer, and a display device capable of highly efficient full color display by using the element. SOLUTION: The luminescent material used for the organic electroluminescent element consisting of an anode 6, a hole injection layer 1, a hole transfer layer 2, a luminescent layer 3 and an electron transfer layer 4, alternatively an anode 6, a hole transfer layer 2, and a luminescent and electron transfer layer 4 comprises an organic metal complex the central metal of which comprises a group 6 heavy metal, and/or the electron configuration of the central metal comprises a closed shell structure represented by (Xe)4f 0 5d 0 6s 0 or (Xe)4f 14 5d 0 6s 0 . COPYRIGHT: (C)2004,JPO
Abstract:
PROBLEM TO BE SOLVED: To provide a long life organic electric field light-emitting element wherein a stable light emission is obtained even in the case of generation of heat by thermal relaxation in an electric field light-emitting process and driving of a long time is possible. SOLUTION: At a time of forming a transparent glass substrate 6 of the organic electric field light-emitting element, a prescribed amount of alumina or barium is kneaded in order to reduce heat expansion coefficient, and the heat expansion coefficient of the substrate 6 is made to be 40.0×10E-7/ deg.C or less. By this, stability of element property against the heat is enhanced, and luminance becomes stabilized also in the case of the thermal relaxation, and life-elongation of the element is realized, and driving for a long time can be made.
Abstract:
PROBLEM TO BE SOLVED: To provide an organic electroluminescent element having high luminance, high performance, and stable reliability, where a luminous color (hue) and/or luminous efficiency have no dependence on driving conditions such as concentrations of a luminescent material contained in a luminous layer or applied voltages or the like. SOLUTION: The organic electroluminescent element comprises an anode 6, a hole-transfer layer 2, the luminous layer 3, and an electron-transfer layer 4, or the anode 6, the hole-transfer layer 2, and a luminous and electron-transfer layer 4. A luminescent region is formed by a mixed layer, which is held between the anode 6 and a cathode 7 as one thin film and composed of the luminescent material having charge transfer properties, which exhibits electroluminescence by applying a DC voltage, and a material for promoting charge injection, which has charge transfer capability that promotes charge injection into the luminescent material and is different from the luminescent material. The luminescent region exists at or near interfaces of adjacent layers as well as to a constant thickness in a layer thickness direction. COPYRIGHT: (C)2004,JPO
Abstract:
PROBLEM TO BE SOLVED: To provide an organic electroluminescent element providing blue light emission at high purity, and a display device capable of providing a full- color display with high color expressibility by using the element. SOLUTION: In the organic electroluminescent element 3, in which at least a hole-transporting layer 503 and a light emitting layer 505 are stacked one above the other from the anode side and sandwiched between a lower electrode 4 serving as an anode and an upper electrode 6 serving as a cathode, the light emitting layer 505 is made from a spiro compound and the hole-transporting layer 503 is made from a triphenylamine tetramer. In the display device 1, the organic electroluminescent elements 3 are aligned as blue light emitting elements at a plurality of pixels.