Device for converting electromagnetic radiation energy into electric energy and a method for manufac

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Device (10) for converting electromagnetic radiation energy into electrical energy, comprising at least a photovoltaic element (11) with a radiation-sensitive surface, wherein a covering layer (12) of a material comprising a silicon compound, to which a rare earth element has been added, is present on said radiation-sensitive surface, characterized in that the material of the covering layer comprises a compound of silicon and nitrogen. Good results were obtained with a compound such as Sr2Si5N8 : Eu.