Luminescent greenhouse glazing structures

A luminescent greenhouse glazing structure comprising:

• 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 comprises elements Al and/or Si and elements O and/or N;
• and have a Si concentration greater than 0 at. % to less than 45 at. %, an Al concentration greater than 0 at. % to less than 50 at. %, an O concentration greater than 0 at. % to less than 70 at. %, an N concentration greater than 0 at. % to less than 60 at. % to less than a Eu2+ concentration greater than 0.01 at. % to less than 30 at. %,
• the glass pane comprises a first top surface and a second bottom surface, the one or more Eu2+ doped amorphous inorganic luminescent thin film layers being provided over the first top surface, and the first top surface is textured with a surface texture for providing a light scattering interface between the glass pane and the one or more Eu2+ doped amorphous inorganic luminescent thin film layers, and
• the surface texture includes texture features selected from the group consisting of patterned cones, pyramids and/or microlenses with average dimensions greater than 10 nm and 1000 nm, or the texture features are semi-random texture features with dimensions i with average dimensions greater than 10 nm and 1000 nm.

A luminescent greenhouse glazing structure comprising:

• a glass pane for a greenhouse;
• one or more Eu2+ doped amorphous inorganic luminescent thin film layers provided over the glass pane, and
• a thin film anti-reflection structure provided over the one or more luminescent thin film layers, for coupling light into the glass pane;
• wherein the one or more Eu2+ doped amorphous inorganic luminescent layers comprises elements Al and/or Si and elements O and/or N;
• and have a Si concentration greater than 0 at. % to less than 45 at. %, an Al concentration greater than 0 at. % to less than 50 at. %, an O concentration greater than 0 at. % to less than 70 at. %, an N concentration greater than 0 at. % to less than 60 at. % to less than a Eu2+ concentration greater than 0.01 at. % to less than 30 at. %,
• the thin film anti-reflection structure comprises a stack of dielectric thin film layers, the stack of dielectric thin film layers including one or more first layers of a first dielectric material having a first refractive index and one or more second layers of a second dielectric material having a second refractive index, the second refractive index being higher than the first refractive index,
• at least part of the one or more first layers includes a low-refractive index Eu2+ doped SiAION layer;
• and/or,
• at least part of the one or more second layers includes a high-refractive index Eu2+ doped SiAION layer;
• and/or,
• at least part of the one or more second layers includes a high-refractive index non-doped SiAION layer, and
• at least part of the one or more first layers includes a low-refractive index Eu2+ doped SiO2 layer doped with Al3+, N3+ and Eu2+ or a SiAlO layer doped with Eu2+;
• and/or,
• at least part of the one or more second layers includes a high-refractive index doped AlN layer doped with Si4+, O2+ and Eu2+ or a SiAlN layer doped with Eu2+;
• and/or,
• at least part of the one or more second layers includes a high-refractive index non-doped AlN layer or a non-doped SiAlN layer.

A luminescent greenhouse glazing structure comprising:

• 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 comprises elements Al and/or Si and elements O and/or N;
• and have a Si concentration greater than 0 at. % to less than 45 at. %, an Al concentration greater than 0 at. % to less than 50 at. %, an O concentration greater than 0 at. % to less than 70 at. %, an N concentration greater than 0 at. % to less than 60 at. % to less than a Eu2+ concentration greater than 0.01 at. % to less than 30 at. %,
• the glass pane comprises a first top surface and a second bottom surface, the one or more Eu2+ doped amorphous inorganic luminescent thin film layers being provided over the first top surface, and the first top surface is textured with a surface texture for providing a light scattering interface between the glass pane and the one or more Eu2+ doped amorphous inorganic luminescent thin film layers, and
• the surface texture has a standard deviation of a Gaussian scattering distribution at the light scattering interface of 20 degrees or more.