US 12,464,853 B2
Solar module with patterned cover plate and optical interference layer
Rene Kalio, Leipzig (DE); Joerg Palm, Munich (DE); Jens Kullmann, Jessen (DE); Manuel Dias, Wiesbaden (DE); and Sven Ring, Berlin (DE)
Assigned to CNBM RESEARCH INSTITUTE FOR ADVANCED GLASS MATERIALS GROUP CO., LTD., Bengbu (CN)
Appl. No. 17/262,686
Filed by CNBM RESEARCH INSTITUTE FOR ADVANCED GLASS MATERIALS GROUP CO., LTD., Bengbu (CN)
PCT Filed Jul. 16, 2019, PCT No. PCT/CN2019/096163
§ 371(c)(1), (2) Date Jan. 22, 2021,
PCT Pub. No. WO2020/020015, PCT Pub. Date Jan. 30, 2020.
Claims priority of application No. 18186153 (EP), filed on Jul. 27, 2018.
Prior Publication US 2021/0313480 A1, Oct. 7, 2021
Int. Cl. H10F 77/42 (2025.01); H02S 20/22 (2014.01); H10F 77/30 (2025.01)
CPC H10F 77/484 (2025.01) [H02S 20/22 (2014.12); H10F 77/315 (2025.01); H10F 77/488 (2025.01)] 16 Claims
OG exemplary drawing
 
1. 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,
wherein:
the outer surface has at least one patterned region, at least one optical interference layer for reflecting light within a predefined wavelength range is directly arranged on the outer surface, wherein a thickness of the at least one optical interference layer is 0.1-2 μm;
the at least one 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 2 μm and the mean height difference between the hills and valleys is a maximum of 20% of a thickness of the transparent cover plate, and
at least 50% of the patterned region 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°;
the at least one patterned region being non-periodic and anisotropic;
the segments are flat and have a segment area of at least 1 μm2, the segments having each a mean roughness of less than 15% of the thickness of the at least one optical interference layer on the outer surface, and
wherein the transparent cover plate is configured such that, in response to the transparent cover plate being 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, and
wherein the at least one optical interference layer is a single-ply optical interference layer such that a bright color tone of the solar module is obtained.