Optical structures comprising luminescent materials for plant growth optimization

• Main Authors: CHUNG KAO, SADIQ VAN OVERBEEK, CHAOUN HSU
• Format: Patent
• Language: English
• Published: 04.02.2021
• Subjects: ADHESIVES; AGRICULTURE; ANIMAL HUSBANDRY; CHEMICAL COMPOSITION OF GLASSES, GLAZES, OR VITREOUSENAMELS; CHEMISTRY; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPSOR SEAWEED; DYES; FISHING; FORESTRY; GLASS; HORTICULTURE; HUMAN NECESSITIES; HUNTING; JOINING GLASS TO GLASS OR OTHER MATERIALS; LAYERED PRODUCTS; LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM; MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FORELSEWHERE; METALLURGY; MINERAL OR SLAG WOOL; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NATURAL RESINS; OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS; OPTICS; PAINTS; PERFORMING OPERATIONS; PHYSICS; POLISHES; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS,MINERALS OR SLAGS; SURFACE TREATMENT OF GLASS; TRANSPORTING; TRAPPING; WATERING

An optical structure is described comprising a transparent substrate having a first surface, a second surface and sides; and, at least one luminescent layer provided over at least one of the first surface and/or second surface of the transparent substrate, the luminescent layer comprising an Eu2+ doped inorganic luminescent material comprising or consisting essentially of the elements A| and/or Si and the elements 0 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 A| concentration between 0 and 50 at.%, the 0 concentration between 0 and 70 at.%, the N concentration between 0 and 60 at.% and the Eu2+ between 0.01 and 30 at.%.