The Fraunhofer Institute for Solar Energy Systems ISE has reported a new record efficiency of 25.9 percent for a III-V/Si tandem solar cell grown directly on silicon. This cell was produced on a low-cost silicon substrate for the first time – marking an important milestone on the way to economical solutions for tandem photovoltaics.
A revolution is already under way which includes development of autonomous wireless sensors, low-power consumer electronics, smart homes, domotics and the Internet of Things. All these elements require efficient and easy-to-integrate energy harvesting devices for their power. Billions of wireless sensors are expected to be installed in interior environments over the coming decades.
Graphene Flagship researchers at the University of Rome Tor Vergata, the Italian Institute of Technology (IIT) and its spin-off, Graphene Flagship Associate Member BeDimensional, in cooperation with Italian National Agency for New Technologies, Energy and Sustainable Economic Development (ENEA) have successfully combined graphene with tandem perovskite-silicon solar cells to achieve efficiencies of up to 26.3%, which almost double the efficiency of pure silicon.