Abstract: There are disclosed an organic electroluminescent (EL) device composition that includes a compound (A) having a perylene ring and a compound (B) having a diketopyrrolopyrrole skeleton, and an organic EL device that includes a pair of electrodes consisting of an anode and a cathode, and one or more organic layers including a light-emitting layer formed between the electrodes, at least one of the organic layers being a layer formed from the organic EL device composition. Furthermore, there are disclosed an organic EL device composition that includes a compound (C) having, as a solid film, a fluorescence spectrum peak wavelength of 550 nm or longer, and a compound (D) having, as a solid film in which Compound (D) is contained at 5 wt % in Compound (C), an area at a wavelength of 600 nm or shorter in a fluorescence spectrum region of 500 to 800 nm of 20% or less of the entire area, and an organic EL device including a light-emitting layer formed from this composition.

Abstract: A light-emitting material which serves to emit light having a high brightness and is almost free of deterioration in light emission, and an organic EL device for which the light-emitting material is adapted, the material having the formula (1) disclosed in claim 1, 2 or 3.

Abstract: A light-emitting material which serves to emit light having a high brightness and is almost free of deterioration in light emission, and an organic EL device for which the light-emitting material is adapted, the material having the formula [1],

Abstract: A hole-injecting material for an organic EL device, having excellent hole-injecting capability and durability and having the formula [I], [II] or [III] specified in claim 1, and an organic electroluminescence device obtained by forming either a light-emitting layer or a plurality of organic compound thin layers including the light-emitting layer between a pair of electrodes composed of a cathode and an anode, wherein at least one layer contains the above material.

Abstract: A hole-injecting material for an organic EL device, having excellent hole-injecting capability and durability and having the formula [I], [II] or [III] specified in claim 1, and an organic electroluminescence device obtained by forming either a light-emitting layer or a plurality of organic compound thin layers including the light-emitting layer between a pair of electrodes composed of a cathode and an anode, wherein at least one layer contains the above material.

Abstract: A material for an organic EL device, having excellent capability of injecting holes from a metal electrode and having durability, and an organic EL device which is imparted with excellent stability in the repeated use for light emission by using the above material, the material having the formula (1), (6) or (7) as specified in claim 1.

Abstract: Hole-transporting materials of the following formula (1) have excellent hole-transporting capability and excellent durability,H--A--?--B--A--!.sub.n --B--A--H (1)wherein A is an aromatic amine derivative residue of the following formula (2), B is a residue of the following formula (3), and n is an integer of 1 to 5,000,Formula (2): ##STR1## Formula (3): ##STR2## and the above hole-transporting materials therefore give an organic EL device and an electrophotographic photoreceptor which are excellent in stability in the continuous operation for a long period time.

Abstract: A hole-transporting material having excellent hole transportation capability and excellent durability, and an organic EL device and an electrophotographic photoconductive drum for which the above hole-transporting material is adapted and which have excellent stability in the repetitive use.

Abstract: A curable adhesive composition comprising an unsaturated polyester oligomer (A) of any of the following formulae (I) to (IV), obtained by reacting a compound (a) having a hydroxyl group and/or an amino group, a cyclic acid anhydride (b) and an epoxide (c) having an ethylenically unsaturated group, and an adhesive polymer (B), ##STR1## wherein: R.sub.1 is a divalent organic moiety having 1 to 40 carbon atoms,R.sub.2 is a divalent organic moiety having 1 to 10 carbon atoms,R.sub.3 is hydrogen or methyl,R.sub.4 is a monovalent organic moiety having 1 to 40 carbon atoms,R.sub.5 is a monovalent organic moiety having 1 to 40 carbon atoms,R.sub.6 is hydrogen or a monovalent organic moiety having 1 to 10 carbon atoms, andn is an integer of 2 or greater.