TECHNOLOGY FOCUS - INSTRUMENTATION AND TESTING - Preferred Components: The conversion element is formed as a layer, where the conversion element satisfies: (cos2 theta ) is less than or equal to 0.2, where theta is the angle between the respective transition dipole moment of the molecules of the phosphor and a layer normal (n), the layer normal (n) is arranged vertically to the layer of the conversion element. A majority of the transition dipole moments of the molecules of the phosphor are arranged parallel to each and in one plane. More than 80% of all transition dipole moments of the molecules of the phosphor comprise a parallel alignment with a deviation of maximal plus minus 45 degrees from the parallel alignment to the layer plane of the conversion element. The layer of the conversion element has a thickness of at least 5 nm and is arranged directly on the radiation source. The radiation source is an organic light emitting diode (6). The conversion element is formed with at least a thickness of 5-200 nm, spatially separated from the radiation source, where conversion element is directly set on a solar cell. The solar cell is established to absorb and at least partly convert electromagnetic secondary radiation into electrical power by the conversion element. The conversion element exhibits more than 90% of entire electromagnetic secondary radiation with a deviation of maximum plus minus 30 degrees from a vertical alignment emitted to the layer plane of the conversion element. The phosphor is substituted or unsubstituted coumarin, substituted or unsubstituted perylene, a laser dye, a boron-dipyrromethene (Bodipy) dye, quasi-planar compound and quasi-planar transition metal complex. The conversion element is formed as a film, where phosphor is embedded in at least one matrix material comprising polyethylene, and the film is stretched such that the film has a thickness of 5-100 mu m, where phosphor is chemically bonded to the matrix material. The conversion element comprises a supplementary phosphor, where more than 80% of all transition dipole moments of the first molecule and the supplementary phosphor is parallely aligned with each other. Preferred Method: The process of deposition of the phosphor on the surface of the radiation source or the solar cell in the step (b1) is maintained at a temperature elevated than the room temperature.