Electroluminescence device
AssigneeRicoh Company, Ltd.
InventorsSeiichi Ohseto, Hiroshi Kobayashi, Shosaku Tanaka
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Abstract
An electroluminescence device capable of emitting white light is disclosed which comprises a SrS layer with Ce added thereto as an activator and a ZnS layer with Mn added thereto as an activator.
Claims8
An electroluminescence device comprising a substrate, an electrode formed on said substrate, an electroluminescence multi-layer comprising at least (1) a ZnS:Mn luminescence layer comprising ZnS and Mn which serves as an activator and (2) a SrS:Ce luminescence layer comprising SrS and Ce which serves as an activator, which luminescence multi-layer is disposed on said electrode, a back electrode disposed on said luminescence multi-layer, and at least one insulating layer interposed between one of said two electrodes and said luminescence multi-layer.
An electroluminescence device comprising a transparent substrate, a transparent electrode formed on said substrate, a first insulating layer formed on said transparent electrode, a first ZnS:Mn luminescence layer comprising ZnS and Mn which serves as an activator, formed on said insulating layer, a SrS:Ce luminescence layer comprising SrS and Ce which serves as an activator, formed on said ZnS:Mn luminescence layer, and a second ZnS:Mn luminescence layer comprising ZnS and Mn which serves as an activator, formed on said SrS:Ce luminescence layer, a second insulating layer formed on said second ZnS:Mn luminescence layer, and a back electrode layer formed on said second insulating layer.
Dependencies are inferred from the claim text.