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: A protective case which is suitable for electronic devices of various sizes includes a bottom case and a positioning element. The bottom case is configured to accommodate an electronic device. The bottom case includes a plurality grooves, and each of the grooves includes a plurality of positioning holes. The positioning element is fixed to one of the positioning holes according to the size of the electronic device.

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 belt hanger is composed of a hanging piece, a hook secured to the hanging piece, a retaining piece secured to the hanging piece, a buckle holder fastened with said retaining piece for holding the buckle of a belt. The retaining piece is provided with a protective jacket fastened therewith for protecting the buckle of the belt.