Composite solid state semiconductive material for generating electro-magnetic radiation and use of said material in an infrared heating device

摘要

The invention relates to a composite material in which electro-magnetic radiation is generated by applying an electric field across said material, whereby said material contains at least an electrically conductive component, as well as a component that generates radiation under influence of an applied electric field, and a component acting as a lens on the generated radiation. Said composite material is thereby characterised by the fact that trivalent ytterbium or a compound of trivalent ytterbium is another component that is present in the composite material and acts as an amplifier for the radiation that is generated in the material.