Conversion element, device, and method for manufacturing a device

The invention relates to a conversion element (2) comprising a luminescent material (2b) which is adapted for the conversion of electromagnetic primary radiation into electromagnetic secondary radiation, a glass composition (2a) as a matrix material, embedded in which the phosphor (2b), wherein the glass composition (2a ) at least one tellurium, R The invention also relates to a component (10) and a method for manufacturing a device (10).