Abstract: Disclosed is an organic electroluminescence device having a longer drive life. The organic electroluminescence device includes a light emitting layer which contains a luminescent dye and a host material having a nitrogen-containing aromatic heterocyclic ring. The luminescence resulting from the hole transport layer adjacent to the light emitting layer is less than one-hundredth of the luminescence resulting from the luminescent dye.

Abstract: Disclosed is an organic electroluminescent device having a longer drive life. Specifically disclosed is an organic electroluminescent device (100) comprising an organic material layer (16), which is composed of a hole transporting layer (164), a light-emitting layer (166) and an electron transporting layer (167), between a pair of electrodes, namely a cathode (18) and an anode (12). The light-emitting layer (166) (having a film thickness (dM) of 5-3000 nm) contains a luminescent dye and a host material. The first oxidation potential (ED+) of the luminescent dye is lower than the first oxidation potential (EH+) of the host material, while the first reduction potential (ED?) of the luminescent dye is lower than the first reduction potential (EH?) of the host material. The film thickness (dE: 5-3000 nm) of the electron transporting layer (167) and the film thickness (dH: 5-3000 nm) of the hole transporting layer (164) satisfy the following relation: dH?dE.

Abstract: An organic EL panel forming light-emitting elements on a substrate includes lower electrode lines stripe-formed on the substrate, upper electrode lines stripe-formed so as to cross the lower electrode lines, an organic EL element laminating an organic layer including a light-emitting layer between the lower electrode lines and the upper electrode lines in the crossing part of the lower electrode lines and the upper electrode lines, extracting terminals electrically connected to the respective upper electrode lines and formed outside the light-emitting element forming area, a common organic layer formed so as to cover at least the overall side edges of the lower electrode lines within the light-emitting element forming area, and a cathode separator stripe-formed on the common organic layer within the light-emitting element forming area so as to insulate-segment the upper electrode lines with the end part extending to the extracting terminals.

Abstract: An organic electroluminescence device having a longer drive life is provided. An organic electroluminescence device is an organic electroluminescence device comprising, between a pair of electrodes composed of a cathode and an anode, a light emitting layer, a hole transport layer provided on the anode side of the light emitting layer, and an electron transport layer provided on the cathode side of the light emitting layer. The organic electroluminescence device is characterized in that the light emitting layer comprises a luminescent dye, and a host material having a nitrogen-containing aromatic heterocyclic ring. The luminescence resulting from the hole transport layer adjacent to the light emitting layer is less than one-hundredth of the luminescence resulting from the luminescent dye.

Abstract: Disclosed is an organic electroluminescent device having a longer drive life. Specifically disclosed is an organic electroluminescent device (100) comprising an organic material layer (16), which is composed of a hole transporting layer (164), a light-emitting layer (166) and an electron transporting layer (167), between a pair of electrodes, namely a cathode (18) and an anode (12). The light-emitting layer (166) (having a film thickness (dM) of 5-3000 nm) contains a luminescent dye and a host material. The first oxidation potential (ED+) of the luminescent dye is lower than the first oxidation potential (EH+) of the host material, while the first reduction potential (ED?) of the luminescent dye is lower than the first reduction potential (EH?) of the host material. The film thickness (dE: 5-3000 nm) of the electron transporting layer (167) and the film thickness (dH: 5-3000 nm) of the hole transporting layer (164) satisfy the following relation: dH?dE.

Abstract: An organic electroluminescent device comprising a pair of positive and negative electrodes opposed to each other, and an organic functional layer formed between the positive and negative electrodes and having three or more thin films including a light emitting layer made of an organic compound. The organic functional layer comprises a pair of first and second layers and a third layer held between the first and second layers. Each of the first and second layers is made of an organic compound a glass transition temperature of which is equal to or higher than a first temperature, and the third layer is made of an organic compound a glass transition temperature of which is lower than the first temperature.

Abstract: An organic electroluminescence element is comprised of a laminate of an anode, a light emitting layer made of an organic compound including phosphorescent materials, an electron transport layer made of an organic compound, and a cathode In the electroluminescence element, a hole blocking layer made of a specific aluminium chelate complex is laminated between the light emitting layer and the electron transport layer.

Abstract: An organic electroluminescence element has a laminate of an anode, a hole injecting layer made of an organic compound and laminated in contact with said anode, a light emitting layer made of an organic compound, an electron transport layer made of an organic compound, and a cathode. The light emitting layer comprises of a carbasol compound as a main component and includes a iridium complex compound at a concentration of 0.5 wt % to 8 wt %.

Abstract: An organic electroluminescence element has a laminate of an anode, a hole injecting layer made of an organic compound and laminated, a light emitting layer made of an organic compound, an electron transport layer made of an organic compound, and a cathode. The light emitting layer includes a phosphorescent material. The hole injecting layer is made of a specific porphyrin compound.

Abstract: An organic electroluminescence element is comprised of a laminate of an anode, a light emitting layer made of an organic compound including phosphorescent materials, an electron transport layer made of an organic compound, and a cathode In the electroluminescence element, a hole blocking layer made of a specific aluminium chelate complex is laminated between the light emitting layer and the electron transport layer.

Abstract: An organic EL element includes a light-permeable anode (2), an organic emitting layer (3), a cathode (5), and a light permeable substrate(1), wherein the organic EL element emits light at a predetermined region upon application of a current between the anode (2) and the cathode (5). The element further includes an electron injection layer (4) formed between the emitting layer (3) and the cathode (5) and having a pattern corresponding to the predetermined region to be displayed. Alternatively, the element further includes an electron obstruction layer (12) formed between the emitting layer (11) and the cathode (13) and having a pattern to restrict emission corresponding to the predetermined region not to be displayed. Alternatively, the element further includes a hole injection layer (18) formed between the anode (2) and the emitting layer (19) having a pattern corresponding to the predetermined region to be displayed.

Abstract: An organic electroluminescence element having an anode, an organic layer comprising at least one organic light emitting layer, and a cathode, wherein a face of the anode to which the organic layer is laminated is polished to prevent the generation of a leakage current, and the resultant deterioration of the current-brightness characteristic and destruction of the element.

Abstract: An organic electro-luminescent element is provided with a drying substance contained in an airtight container and spaced from the element in an internal space of the airtight container for absorbing moisture in the internal space. The drying substance comprises a solid compound which chemically absorbs the moisture and maintains its solid state even after absorbing the moisture.