An optical element having a cover comprising a 2-dimensional material. The optical element includes a cover having a first surface and a second surface, a support, and a means, where the cover is orientated with the first surface directed towards the support, a part of the first surface is attached to the support, a spatial arrangement of the second surface relative to the support defines a cover contour profile, the means is adapted and arranged to move the second surface from a first cover contour profile to a further cover contour profile, the cover comprises a 2-dimensional portion which is one or more 2-dimensional materials, the cover has a value of transmittance divided by reflectance of not more than 0.5, for light incident on the second surface, the reflectance and transmittance being measured at a wavelength λ, and λ is in the range from 10 nm to 20 μm.

The present invention relates to a method of depositing a coating comprising zinc oxide on a substrate; to a chemical vapour deposition precursor mixture for use in same and to a coated glass article and a photovoltaic cell prepared with a zinc oxide coating prepared using the method which comprises: providing a substrate, providing a precursor mixture comprising an alkyl zinc compound and a phosphorus source, the phosphorus source comprising a compound of formula O.sub.nP(OR).sub.3, wherein n is 0 or 1 and each R is hydrocarbyl, and delivering the precursor mixture to a surface of the substrate.

The present invention relates to a method of depositing a coating comprising zinc oxide on a substrate; to a chemical vapour deposition precursor mixture for use in same and to a coated glass article and a photovoltaic cell prepared with a zinc oxide coating prepared using the method which comprises: providing a substrate, providing a precursor mixture comprising an alkyl zinc compound and a phosphorus source, the phosphorus source comprising a compound of formula O.sub.nP(OR).sub.3, wherein n is 0 or 1 and each R is hydrocarbyl, and delivering the precursor mixture to a surface of the substrate.

The present invention relates to a method of depositing a coating comprising zinc oxide on a substrate; to a chemical vapour deposition precursor mixture for use in same and to a coated glass article and a photovoltaic cell prepared with a zinc oxide coating prepared using the method which comprises: providing a substrate, providing a precursor mixture comprising an alkyl zinc compound and a phosphorus source, the phosphorus source comprising a compound of formula O.sub.nP(OR).sub.3, wherein n is 0 or 1 and each R is hydrocarbyl, and delivering the precursor mixture to a surface of the substrate.

A semitransparent photovoltaic module includes a submodule with a first glass layer, a transparent conducting oxide layer, a semiconductor layer, and a metal back contact layer. The submodule further includes a plurality of interconnection scribes extending in a first direction across the submodule and a plurality of light transmission scribes disposed perpendicularly to the plurality of interconnection scribes in a second direction. The module may further include a lamination layer and a second glass layer and have a visible light transmission of about 7% to about 70% and is capable of generating about 60 W to about 120 W of power. In one embodiment, the light transmission scribes are about 0.05 mm to about 1 mm wide, with a pitch of about 1 mm to about 5 mm.