Multijunction solar panel, also known as compound solar panel, is a type of photovoltaic cells that are made up of multiple layers of semiconductors with a different bandgap that can absorb different wavelengths of light. This technology allows for the absorption of a greater range of the solar spectrum and thus a higher conversion efficiency.
The most common type of multijunction solar cells is the 3-junction solar cell, which is composed of three layers of semiconductor materials such as gallium arsenide, indium gallium phosphide, and germanium, each designed to capture a different range of the solar spectrum. The top layer absorbs the visible light, while the middle and bottom layers absorb the infrared and ultraviolet light, respectively.
Multijunction solar cells are commonly used in concentrated photovoltaic (CPV) systems, which use lenses or mirrors to concentrate sunlight onto a small, high-efficiency solar cell. This allows for a reduction in the amount of semiconductor material needed, as well as a higher efficiency than traditional flat-panel solar cells.
Overall, the use of multijunction solar cells has the potential to increase the efficiency and reduce the cost of solar power, making it a promising technology for the future of renewable energy.
