Patent ID: 11908966
Assignee: CNBM RESEARCH INSTITUTE FOR ADVANCED GLASS MATERIALS GROUP CO., LTD.
Field: Semiconductors (Electrical engineering)
Classification: CPC H  G  Y | IPC G  H

Claim 14:
15. A solar module for photovoltaic energy generation, comprising:
a transparent cover plate with an outer surface facing an external environment and an opposite inner surface;
according to alternatives i) or ii):
i) an optical interference layer for reflecting light within a predefined wavelength range is arranged on the inner surface, the inner surface and/or the outer surface having at least one patterned region, wherein either a) the outer surface has at least one patterned region, orb) another optical interference layer for reflecting light within a predefined wavelength range is arranged on the outer surface, or
ii) an optical interference layer for reflecting light within a predefined wavelength range is arranged on the inner surface, the inner surface having at least one patterned region, and the outer surface having no patterned region, wherein no optical interference layer is arranged on the outer surface;

the patterned region has the following features:
perpendicularly to a plane of the cover plate, a height profile with hills and valleys, wherein a mean height difference between the hills and valleys is at least 50 μm or at least 100 μm, and
at least 50% of the at least one patterned region of the alternatives i) or ii) is composed of segments that are inclined relative to the plane of the cover plate, wherein, with reference to the plane of the cover plate, at least 20% of the segments have an inclination angle in a range from greater than 0° to 15°, and at least 30% of the segments have an inclination angle in a range from greater than 15° to 45°;

if the inner surface has at least one patterned region, the segments of the patterned region of the inner surface are planar, and have a segment area of at least 1 μm2 and a mean roughness of less than 15% of a layer thickness of the optical interference layer on the inner surface; wherein the patterned region has a reflection haze of more than 50%, wherein the cover plate is configured such that, when provided with a black inner surface and illuminated on an illuminated surface opposite the black inner surface at an angle of incidence that deviates by 45° from a glancing angle of the illuminated surface, a brightness L of a reflected light with a color effect is observed at viewing angles of 45° and 15°, wherein the viewing angles are based on a normal relative to the cover plate, L being selected from the group consisting of at least 10, at least 15, and at least 20.