A color conversion sheet converts incident light into light with a wavelength longer than that of the incident light. The color conversion sheet includes the following layer (A) and layer (B): the layer (A): a layer containing an organic light-emitting material (a) that exhibits light emission with a peak wavelength observed in a region of 500 nm or more and 580 nm or less by using excitation light in a wavelength range of 400 nm or more and 500 nm or less and a binder resin; and the layer (B): a layer containing an organic light-emitting material (b) that exhibits light emission with a peak wavelength observed in a region of 580 nm or more and 750 nm or less by being excited by either or both of excitation light in a wavelength range of 400 nm or more and 500 nm or less and light emission from the organic light-emitting material (a) and a binder resin.

An organic light-emitting device includes: a first electrode; a second electrode facing the first electrode; and an organic layer between the first electrode and the second electrode, the organic layer including an emission layer. The organic layer includes a first compound represented by Formula 1 and a second compound represented by Formula 2. The first compound may be included in an emission layer, and the second compound may be included in an electron transport region.

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It is an object of the present invention to provide a composite material that can be used for manufacturing a heat-resistant light-emitting element, provide a composite material that can be used for manufacturing a heat-resistant light-emitting element that can be driven with stability for a long period of time, and further, provide a composite material that can be used for manufacturing a light-emitting element that easily prevents short circuit between electrodes and uses less power. The present invention provides a composite material that has a first metal oxide skeleton including a first metal atom and an organic compound that is bound to the first metal atom by forming a chelate, where the first metal oxide exhibits an electron accepting property to the organic compound.

An organic metal complex represented by the following general formula is useful as a light emitting material for an organic electroluminescent device and others. X represents O, S or N(R.sup.7); Y represents O, S or N(SO.sub.2R.sup.8); R.sup.1 to R.sup.8 represent H, an alkyl group or an aryl group; at least one of Z.sup.1 and Z.sup.2 represents a phenoxazin-10-yl group, a phenothiazin-10-yl group, a phenazin-10-yl group, etc.; M represents an element of the group 1 except for hydrogen, the group 2, the group 11, the group 12, or the group 13 of the periodic table; L represents a ligand; n is 1 to 3; and m is 0 to 2: ##STR00001##

A composition formed of a mixture of two compounds having similar thermal evaporation properties that are pre-mixed into an evaporation source that can be used to co-evaporate the two compounds into an emission layer in OLEDs via vacuum thermal evaporation process is disclosed. The first and second compounds can have an evaporation temperature T.sub.1 and T.sub.2, respectively, of 150 to 350 C., and the absolute value of T.sub.1-T.sub.2 can be less than 20 C. The first compound can have a concentration C.sub.1 in the mixture and a concentration C.sub.2 in a film formed by evaporating the mixture in a vacuum deposition tool at a constant pressure between 110.sup.6 Torr to 110.sup.9 Torr, at a 2 /sec deposition rate on a surface positioned at a predefined distance away from the mixture being evaporated, where the absolute value of (C.sub.1C.sub.2)/C.sub.1 is less than 5%.

The present invention provides a planar electroluminescence (EL) device comprising a substrate layer, an electrode layer, a light emitting layer, and a modulating layer, wherein the electrode layer comprises a plurality of electrodes arranged on a same level over the substrate layer, and there is no contact between adjacent electrodes. In one embodiment, the device further comprises a hole injection layer (HIL), a hole transport layer (HTL), an electron injection layer (EIL) and an electrode transport layer (ETL). In one embodiment, the light emitting layer comprises organic light emitting polymers or organic light emitting molecules. The device of the present invention would emit light when liquid, polar component, or conductive solution is written directly on the light emitting layer. In one embodiment, the device can emit light for prolonged period when the light emitting layer is coated or deposited with conductive material.

The present invention relates to metal complexes and to electronic devices, especially organic electroluminescent devices, comprising these metal complexes, especially as emitters.

A method of making doped Alq.sub.3 nanostructures with enhanced photoluminescence is provided. The method of making doped Alq.sub.3 nanostructures with enhanced photoluminescence includes the steps of dissolving tris(8-hydroxyquinolinato)aluminum (Alq.sub.3) and a metal in water to form a solution. The metal may be terbium (Tb), copper (Cu), silver (Ag), dysprosium (Dy) or europium (Eu), for example. The metal may be provided in a water soluble form, such as chlorides and nitrates thereof. The solution is then subjected to ultrasonic waves (i.e., a sonication bath) for a period of approximately 3 hours to approximately 4 hours. The solution is then dried at a temperature of approximately 50 C. for a period of approximately 8 hours to form a powder of Alq.sub.3 doped with the metal. The powder is then formed into nanostructures of the Alq.sub.3 doped with the metal.

A composition formed of a mixture of two compounds having similar thermal evaporation properties that are pre-mixed into an evaporation source that can be used to co-evaporate the two compounds into an emission layer in OLEDs via vacuum thermal evaporation process is disclosed. The first and second compounds can have an evaporation temperature T.sub.1 and T.sub.2, respectively, of 150 to 350 C., and the absolute value of T.sub.1-T.sub.2 can be less than 20 C. The first compound can have a concentration C.sub.1 in the mixture and a concentration C.sub.2 in a film formed by evaporating the mixture in a vacuum deposition tool at a constant pressure between 110.sup.6 Torr to 110.sup.9 Torr, at a 2 /sec deposition rate on a surface positioned at a predefined distance away from the mixture being evaporated, where the absolute value of (C.sub.1-C.sub.2)/C.sub.1 is less than 5%.

The present invention provides charge transporting molecular glass mixtures, luminescent molecular glass mixtures, or combinations thereof comprising at least two nonpolymeric compounds each independently corresponding to the structure (R.sup.1Y.sup.1).sub.p [(Z.sup.1Y.sup.2).sub.mR.sup.2Y.sup.3J.sub.nZ.sup.2Y.sup.4R.sup.3 wherein m is zero or one; n is zero up to an integer at which said compound starts to become a polymer; p is an integer of from one to eight; each R.sup.1 and R.sup.3 is independently a monovalent aliphatic or cycloaliphatic hydrocarbon group having 1 to 20 carbon atoms, an aromatic group or a multicyclic aromatic nucleus; R.sup.2, Z.sup.1, and Z.sup.2 each independently represent multivalent aliphatic or cycloaliphatic hydrocarbon groups having 1 to 20 carbon atoms or an aromatic group; and Y.sup.1, Y.sup.2, Y.sup.3, and Y.sup.4 each independently represent one or more linking groups.