Bandgaps of multi-junction solar cells potentially determined at the sun height of the culmination on the winter solstice

摘要

Bandgap optimization of the tandem cells has been calculated by many scientists under the standard air mass 1.5 spectrum or the site-specific conditions using statistics of meteorological observations and spectrum data. Calculation of the optimized bandgap combination at the specific site required many annually-observed atmospheric parameters. It is not realistic, because most of the installation site does not have detailed annual spectrum information.