Abstract: A device for converting solar radiation is described wherein the device comprises an inorganic luminescent material comprising a host material doped with Mn5+ ions for converting radiation of the UV and/or visible part of the electromagnetic spectrum into radiation of the near-infrared radiation part of the electromagnetic spectrum, preferably the infrared part between 1150 nm and 1250 nm, preferably around 1190 nm (the infrared emission peak of Mn5+); or, an amorphous host material doped with Sm2+ or Tm2+ ions, the amorphous host material including the elements Al, Si, O and N (SiAlON) for converting radiation of the UV and/or visible part of the electromagnetic spectrum into radiation of a longer wavelength, preferably a longer wavelength between 650 nm and 800 nm or a longer wavelength of around 1140 nm; and, at least one photovoltaic device for converting at least part of the converted radiation into electrical power.

Abstract: A luminescent layer is described comprising an Eu2+ doped inorganic luminescent material comprising or consisting essentially of the elements Al and/or Si and the elements O and/or N, the doped inorganic luminescent material converting radiation of the UV region between 200 nm and 400 nm of the solar spectrum into the photosynthetically active radiation (PAR) region (400 nm-700 nm) of the solar spectrum, wherein the Si concentration in the inorganic luminescent material is selected between 0 and 45 at. %, the Al concentration between 0 and 50 at. %, the O concentration between 0 and 70 at. %, the N concentration between 0 and 60 at. % and the Eu2+ between 0.01 and 30 at. %.

Abstract: Luminescent greenhouse glazing structures are described wherein the glazing structures comprise: a glass pane for a greenhouse; and, one or more Eu2+ doped amorphous inorganic luminescent thin film layers provided over the glass pane, wherein the one or more Eu2+ doped amorphous inorganic luminescent layers comprise or consist essentially of the elements Al and/or Si and the elements O and/or N; and, wherein the Si concentration is selected between 0 and 45 at. %, the Al concentration between 0 and 50 at. %, the O concentration between 0 and 70 at. %, the N concentration between 0 and 60 at. % and the Eu2+ between 0.01 and 30 at. %.

Abstract: A device for converting solar radiation is described wherein the device comprises an inorganic luminescent material comprising a host material doped with Mn5+ ions for converting radiation of the UV and/or visible part of the electromagnetic spectrum into radiation of the near-infrared radiation part of the electromagnetic spectrum, preferably the infrared part between 1150 nm and 1250 nm, preferably around 1190 nm (the infrared emission peak of Mn5+); or, an amorphous host material doped with Sm2+ or Tm2+ ions, the amorphous host material including the elements Al, Si, O and N (SiAION) for converting radiation of the UV and/or visible part of the electromagnetic spectrum into radiation of a longer wavelength, preferably a longer wavelength between 650 n and 800 nm or a longer wavelength of around 1140 n; and, at least one photovoltaic device for converting at least part of the converted radiation into electrical power.