摘要:
A polymeric fluorescent substance or polymeric fluorescent substance solution is disclosed which can attain higher luminous efficiency as a polymer LED. The polymeric fluorescent substance has a specific content of water or poor solvent. Also disclosed is an organic electroluminescence device comprising at least one light-emitting layer that contains substantially no particle-like foreign materials having a diameter of more than 1 &mgr;m and that has few dark spots.
摘要:
Provided is a polymeric fluorescent substance showing fluorescence in solid state, which has a specific carrier drift mobility, a specific repeating unit, and specific number-average molecular weight. The polymeric fluorescent substance is excellent in solubility to organic solvents, and has higher efficiency and longer lifetime in applying as a polymer LED.
摘要:
A method for producing a polymeric fluorescent substance characterized by comprising the step of treating with an acid a polymeric fluorescent substance that is fluorescent in a solid state and has a polystyrene equivalent number average molecular weight of 1×104 to 1×108. A method for producing a polymeric fluorescent substance characterized by comprising the steps of treating with an acid a polymeric fluorescent substance that is fluorescent in a solid state and has a polystyrene equivalent number average molecular weight of 1×104 to 1×108 and treating it with an alkali. A method for producing a polymeric fluorescent substance characterized by comprising the steps of treating with an acid a polymeric fluorescent substance that is fluorescent in a solid state and has a polystyrene equivalent number average molecular weight of 1×104 to 1×108, treating it with an alkali and finally treating it with a substance that does not contain an acid or an alkali.
摘要:
Provided is a polymeric fluorescent substance showing fluorescence in solid state, which has a specific carrier drift mobility, a specific repeating unit, and specific number-average molecular weight. The polymeric fluorescent substance is excellent in solubility to organic solvents, and has higher efficiency and longer lifetime in applying as a polymer LED.
摘要:
A polymeric fluorescent substance exhibiting strong visible fluorescence in solid state. The substance has a polystyrene reduced number-average molecular weight of 1×103 to 1×108, and contains repeating units represented by formula (1), —Ar1—(CR1═CR2)m— (1) in the formula, Ar1 represents an arylene group having a specific substituent. By using the polymeric fluorescent substance, a high performance polymer LED can be prepared easily.
摘要:
Provided is a polymeric fluorescent substance showing fluorescence in solid state, which has a specific carrier drift mobility, a specific repeating unit, and specific number-average molecular weight. The polymeric fluorescent substance is excellent in solubility to organic solvents, and has higher efficiency and longer lifetime in applying as a polymer LED.
摘要:
Provided is a polymeric fluorescent substance showing fluorescence in solid state, which has a specific carrier drift mobility, a specific repeating unit, and specific number-average molecular weight. The polymeric fluorescent substance is excellent in solubility to organic solvents, and has higher efficiency and longer lifetime in applying as a polymer LED.
摘要:
An inkjet recording device, wherein air can be retained in an ink supply pipe by using a simple structure without applying substantial changes to the inkjet recording device, a variation in an ink supply pressure is mitigated by the retained air, and ink can be ejected with high stability. An inkjet recording device is provided with an inkjet head for ejecting ink, an ink flow path for supplying the ink, which is supplied from an ink supply source, to a pressure chamber of the inkjet head and having at least a portion thereof constructed from an ink supply pipe, and an air retaining member inserted in the ink supply pipe, with the ink allowed to pass through the air retaining member, and retaining air in at least a portion of a space formed between the air retaining member and the inner surface of the ink supply pipe.
摘要:
Disclosed is an ink jet head exhibiting good assemblability while protecting an electrode portion. An ink jet head (10) comprising a head chip (2) including drive walls (22) and channels (23) juxtaposed alternately with a drive electrode (25) being formed on the drive wall (22), and a nozzle plate (24) wherein a connection electrode is formed on the rear surface of the head chip (2), a wiring board (3) on which an electrode portion (32) is formed is bonded to project from the head chip (2), and ink in the channel (23) is ejected by causing shear deformation of the drive wall (22) is further provided with a holding member (5) disposed at a position covering the electrode portion (32) and holding a portion (31) of the wiring board (3) projecting from the head chip (2), and an electrode portion protection member (4) bonded between the holding member (5) and the electrode portion (32) using adhesive and having a thickness in the range of 0.01-0.5 mm at a part covering the electrode portion (32).
摘要:
A branched compound having a construction with a core portion, at least 3 side chain portions bonded to the core portion, and end portions bonded to each of the side chain portions, wherein the side chain portions arc groups in which a plurality of conjugated units are linked, at least one of the conjugated units being a divalent heterocyclic group, at least one of the end portions is a group represented by formula (1), and the side chain portions and the end portions are conjugated with the core portion. [In the formula, Ar represents a trivalent aromatic hydrocarbon or a trivalent heterocyclic group, and X represents oxygen, sulfur, or a group represented by formula (a).] [In the formula, A represents hydrogen, a halogen or a monovalent group, and at least one A group is an electron-withdrawing group.]