Abstract:
PROBLEM TO BE SOLVED: To provide an efficient method of purifying polyphenylene. SOLUTION: Polyphenylene is purified through the following steps: (step 1) the crude reaction mixture including polyphenylene is dissolved in a solvent, the solution is concentrated and the resultant impurities are removed by filtration and the filtrate is concentrated to collect the resultant solid. These works are repeated once or more times; (step 2) the solid obtained in the step 1 is dissolved in a solvent and further the solvent is added. The resultant solution is concentrated by adding another more solubilizing solvent. Then, the first crystals are separated by filtration, the filtrate is concentrated again to separate the second crystal in the similar way and the first crystals and the second crystals are combined; (step 3) after the step 2 the first and the second crystals are dissolved in a solvent, followed by addition of a poor solvent and the solution is concentrated to separate the third crystals by filtration. The similar operations are repeated again to obtain the fourth crystals. Then, the third and fourth crystals are combined. These processes are repeated once or more times.
Abstract:
PROBLEM TO BE SOLVED: To provide an organic electroluminescent element to emit a red light which has a high red color purity and a high brightness and stability by using a compound which has a high fluorescent yield, and which is also superior in a thermal stability. SOLUTION: This is the organic electric field luminescent element wherein an ITO transparent electrode 2, a hole transport layer 6, an electron transport layer 7 and a metal-electrode 3 are laminated in this order, and the hole transport layer 6 and/or the electron transport 7 is composed of the mixture layer containing at least one kind of amino styryl compound expressed in formula [I], and further, wherein a hole blocking layer 30 is installed between the hole transport layer 6 and the electron transport layer 7. In formula [I], X1 is an aryl group such as a phenyl group that has a substituent like nitro group, and Y1 and Y2 are groups that have aminophenyl group or the like in a skeleton.
Abstract:
PROBLEM TO BE SOLVED: To improve contrast characteristics of a light emission element (an organic electroluminescence element, inorganic electroluminescence element) while maintaining a high luminosity. SOLUTION: In the light emission element in which a layer including a luminescence domain is prepared between an anode and a negative pole, a visible light (wavelength of 380-780 nm) transmittance of the above-mentioned anode is specified at 35-75%, and the work function of the above anode is further specified at 3.0-7.0 eV.
Abstract:
PROBLEM TO BE SOLVED: To provide an organic electric field light emitting element yielding red light with stable and large light brightness. SOLUTION: The organic electric field light emitting element contains in its organic layers 5, 5a and 5b with light-emitting regions, one of styryl compounds which can be represented by the following formula 1. Wherein R1 and R2 are the aryl group shown by the general formulas 2, 3, or 4. In the formulas, R3 through R21 are specific substituted group including hydrogen atoms and methoxy groups, and X is a substituted or non-substituted aryl group or hydrocarbon ring.
Abstract:
PROBLEM TO BE SOLVED: To provide an organic EL element having a good life characteristic and high reliability, and to provide a display using the same. SOLUTION: In the organic EL element 3, wherein an organic thin film layer 5 including at least a light emission layer 503 is interposed between a bottom electrode 4 which is an anode electrode and a top electrode 6 which is a cathode electrode. Any one of layers constituting the organic thin film layer 5 (especially, the light emission layer 503) contains a styryl amine derivative shown by a general expression (1). COPYRIGHT: (C)2006,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To provide an organic electroluminescent element sufficiently excellent in emission efficiency and color purity, and high in reliability, and an indicating device constituted by using this. SOLUTION: In an organic electroluminescent element 3 constituted by putting at least light emitting layer 503 between a lower electrode 4 as an anode and an upper electrode 6 as a cathode, the light emitting layer 503 is emitted in green light by containing fluoranthene dielectric. This fluoranthene dielectric is introduced into a light emitting layer 50 as a guest. And, the light emitting layer 503 contains an organic material, for example aryl anthracene dielectric, in which fluorescence spectrum has an overlap with an absorption spectrum of the fluoranthene dielectric. And, an indicating device 1 is constituted by arranging this organic electroluminescent element 3 on a substrate 2 as a green light emitting device. COPYRIGHT: (C)2006,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To obtain a polyphenylene derivative which has high solubility in an organic solvent, low crystallinity, an excellent heat stability and a high fluorescence quantum efficiency and an organic electroluminescent element emitting high-luminance and high-efficiency blue luminescence. SOLUTION: The polyphenylene derivative is represented by general formula (1) (R 1 , R 2 and R 3 may be the same or different and are each a hydrogen atom, a ≤20C atomic group or group which may contain a substituent group; x, y and z are each independently an integer of ≤5; n is an integer of ≤8). The organic electroluminescent element contains the polyphenylene derivative in an organic layer. COPYRIGHT: (C)2004,JPO
Abstract:
PROBLEM TO BE SOLVED: To improve a contrast characteristic while raising light emitting efficiency of a light emitting element (an organic electric field light emitting element, an inorganic electric field light emitting element) and maintaining high luminosity. SOLUTION: In the light emitting element, in which a layer containing a light emitting domain is prepared between a positive electrode 2 and a negative electrode 9 on a substrate 1, the emitted light 11 generated in the light emitting domain is taken out from the negative electrode 9 side, the work function of the positive electrode 2 is 5.0 to 7.0 eV, and the visible light reflectance of the positive electrode 2 is 50% or less.
Abstract:
PROBLEM TO BE SOLVED: To provide an organic electric field light emitting device, which has high luminosity and stable red luminescence. SOLUTION: A mixture containing at least one sort of aminostyryl compound expressed with the following formula [I] or [II] to at least 1 part of an organic layers 5, 5a, or 5b, which have a luminescence domain, is contained. Formula [I]: Y1-CH=CH-X1-CH=CH-Y2 Formula [II]: Y3-CH=CH-X2 However in the formula, X1 and X2 express aryl group, such as anthracene group, and Y1, Y2 and Y3 express arylamino group or the like.
Abstract:
PROBLEM TO BE SOLVED: To provide a organic field red light emitting element having stable and large light brightness. SOLUTION: The organic field light emitting element which its organic layers 5, 5a, or 5b contains distyryl compound shown by the general formula 1. Wherein at least one of R1-R4 is the substituted or non-substituted phenyl base, and at least one of them is the substituted or non-substituted naphthyl base or R1-R4 are the substituted or non-substituted naphthyl bases. X is the anthracene base substituted and introduced by the cyano base, nitro base, or halogen atom.