Abstract: It is an object of the present invention to provide an organic electroluminescent element having a longer lifetime. In order to accomplish the object, an organic electroluminescent element adapted to comprise a light emitting layer including an organic material between an anode and a cathode is provided with a hole transport layer for transporting holes injected from the anode toward the light emitting layer. Along with the hole transport layer, an intermediate layer having an energy level of a lowest unoccupied molecular orbital lower than those of the hole transport layer and the light emitting layer is provided therebetween.

Abstract: An organic electroluminescent element comprising a cathode, an anode, an intermediate unit arranged between a cathode and an anode, a first light emitting unit arranged between a cathode and an intermediate unit, and a second light emitting unit arranged between an anode and an intermediate unit, wherein an electron extracting layer for extracting an electron from an adjacent layer adjoining a cathode side is provided in an intermediate unit, an absolute value of an energy level of a lowest unoccupied molecular orbital (LUMO) of an electron extracting layer |LUMO(A)|, and an absolute value of an energy level of a highest occupied molecular orbital (HOMO) of the adjacent layer |HOMO(B)| are in the relationship of |HOMO(B)|?|LUMO(A)|?1.5 eV, and an intermediate unit supplies a hole generated by extraction of an electron from an adjacent layer by an electron extracting layer and, at the same time, supplies the extracted electron to a second light emitting unit.

Abstract: A red color filter layer is provided under an organic EL device. A green color filter layer, a blue color filter layer, and a region without a color filter layer are provided in this order under an organic EL device. Orange light from the organic EL device is transmitted through the red color filter layer, so that red color is obtained. White light from the organic EL device is transmitted through the green color filter layer and the blue color filter layer, so that green light and blue light are obtained. White light is obtained from the organic EL device. In this way, red light, green light, blue light, and white light are obtained.

Abstract: In an organic electroluminescent element in which a light emitting layer is disposed between a hole injection electrode and an electron injection electrode, and a hole injection layer is provided between the hole injection electrode and the light emitting layer, and an electron transport layer is provided between the electron injection electrode and the light emitting layer, the organic electroluminescent element is characterized in that a fluorocarbon layer is provided between the hole injection layer and the light emitting layer, and the electron transport layer is formed from a phenanthroline compound.

Abstract: An organic EL device has a structure that includes a hole injecting electrode, hole injecting layer, hole transporting layer, light emitting layer, electron restricting layer, electron transporting layer, and electron injecting electrode, in sequence, on a substrate. For the electron restricting layer, a material having an electron mobility lower than that of the electron transporting layer or a material having a low LUMO (lowest unoccupied molecular orbital) energy level is used.

Abstract: A large-sized organic EL display unit is formed by bonding four small display panels on junction surfaces so that the pitch between emission parts adjacent to each other over the small display panels is equal to the pitch between the emission parts in the small display panels, so that the junction between the adjacent ones of the small electroluminescence display panels is inconspicuous.

Abstract: A plurality of groups of integrated elements (30, 40) comprising a plurality of photovoltaic elements (2) electrically connected in series are provided on a substrate (1) having an insulating surface. The plurality groups of integrated elements (30, 40) are arranged in parallel by interposing a separating part (50). A rear surface member (4) is electrically connected with the plurality of the groups of integrated elements (30, 40) in series and is adhered to a rear surface side of the plurality of groups of integrated elements (30, 40) by interposing an adhesive layer (5) containing resin. The adhesive layer (5) is provided so as to cover a rear surface of the groups of integrated elements (30, 40) except for an area corresponding to the separating part (50).

Abstract: A large-sized organic EL display unit is formed by bonding four small display panels on junction surfaces so that the pitch between emission parts adjacent to each other over the small display panels is equal to the pitch between the emission parts in the small display panels, so that the junction between the adjacent ones of the small electroluminescence display panels is inconspicuous.