Historically, the most common type of solar cell has been the crystalline silicon solar cell, which has dominated the market since its inception. Traditional silicon solar cells have achieved efficiencies around 15-22%, which is considerably better than earlier technologies. However, researchers and engineers are continually pushing the boundaries to unlock even higher efficiencies. One of the major advances in this field is the development of multi-junction solar cells. These cells stack multiple layers of photovoltaic materials, each designed to capture different segments of the solar spectrum. As a result, multi-junction cells have been able to achieve efficiencies exceeding 40% in laboratory settings, making them the most efficient solar cells available today.
