Tandem Solar Cells – Record Efficiency for Silicon-based Multi-junction Solar Cell

Tandem solar cell made of silicon and III-V semiconductor materials, a more energetically efficient use of the solar spectrum is possible, compared to conventional solar cells available today. Image: Fraunhofer ISE/ A. Wekkeli

Current-voltage characteristic of the new III-V/Si tandem solar cell with an efficiency of 22.3%. Image: Fraunhofer ISE