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US 5,516,577 AGranted
Organic electroluminescence device
AssigneeIdemitsu Kosan Co., Ltd.
InventorsMasahide Matsuura, Tadashi Kusumoto, Hiroshi Tokailin
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AssigneeIdemitsu Kosan Co., Ltd.
InventorsMasahide Matsuura, Tadashi Kusumoto, Hiroshi Tokailin
Estimating the term…
An organic electroluminescence device which comprises laminating layers in the order of anode/light emitting layer/adhesive layer/cathode, or anode/hole-injecting layer/light emitting layer/adhesive layer/cathode, the energy gap of the light emitting layer being larger than that of 8-hydroxyquinoline or metal complex thereof and contained in the adhesive layer, the light emitting layer comprising a compound which emits a blue, greenish blue or bluish green light in CIE chromaticity coordinates, and the adhesive layer including a metal complex of 8-hydroxyquinoline or a derivative thereof and at least one organic compound in an arbitrary region in the direction of the thickness of the layer, the thickness of which is smaller than that of the above-mentioned light emitting layer. According to the above organic electroluminescence device, improvements in uniformity in light emission and emission efficiency are realized.
An organic electroluminescence device which comprises laminating layers in the order of anode/light emitting layer/adhesive layer/cathode, or anode/hole-injecting layer/light emitting layer/adhesive layer/cathode, wherein the adhesive layer comprises a metal complex of 8-hydroxyquinoline or a metal complex of a 8-hydroxyquinoline derivative, said adhesive layer further comprising at least one additional organic compound in an arbitrary region in the direction of the thickness of the adhesive layer, the thickness of which is smaller than that of the light emitting layer, and wherein the light emitting layer has an energy gap larger than that of the metal complex of 8-hydroxyquinoline or the metal complex of 8-hydroxyquinoline derivative contained in the adhesive layer, and wherein the light emitting layer comprises a compound which emits blue, greenish blue or bluish green light in CIE chromaticity coordinates.
Dependencies are inferred from the claim text.