Soitec’s four-junction solar cell has achieved today a peak efficiency of 43.6 percent, as confirmed by the Fraunhofer ISE Calibration Laboratory. This measurement was achieved at a concentration level of 319 (319 suns). The new cell has demonstrated more than 43 percent energy-generating efficiency over a concentration range between 250 and 500.
Today’s triple-junction solar cells used in commercial concentrator photovoltaic (CPV) modules in real-world applications are approaching their physical limits in converting sunlight into renewable energy. Soitec’s four- junction cell is designed to increase the conversion efficiency of commercial CPV systems to the highest level ever achieved by any photovoltaic technology. Based on the initial results obtained using very few integration runs, Soitec is well positioned at the front of the efficiency race.
The innovative four-junction cell uses two new, highly sophisticated dual-junction sub cells grown on different III-V compound