, Medium-CPV and High-CPV - increase their efficiency by concentrating the sunlight to a greater or lesser extent using lenses or mirrors. LCPV solar cells (Low-CPV) have the lowest sunlight concentration of the various CPV processes. It ranges from two to one hundred times. For Medium-CPV solar cells, it is between one hundred and three hundred times, and for High Concentration Photovoltaics, the light concentration reaches one thousand times or more. This high concentration causes
toreceive and convert much more light
, increasing their efficiency.At the same time, however, they also generate heat that must be dissipated to prevent destruction due to overheating. In order not to reduce the efficiency of HCPV solar cells through active cooling, heat dissipation must therefore be passive. The efficiency of HCPV solar cells is over 40 %. These values are achieved by multilayer solar cells in which each individual layer
absorbs specific wavelengths of light.