Imec, the leading research and innovation hub in nanoelectronics, energy and digital technology, within the partnership of EnergyVille, announced a record result for its 4-terminal perovskite/silicon tandem photovoltaic cell. In fact, with a reported power conversion efficiency of 27.1%, the new tandem cell tops the most efficient standalone silicon solar cell. Further careful engineering of the Perovskite material will bring efficiencies over 30% in reach.
Imec's new record tandem cell uses a 0.13 cm2 spin-coated perovskite cell developed within the Solliance cooperation, stacked on top of a 4 cm2 industrial interdigitated back-contact (IBC) silicon cell in a 4-terminal configuration, which is known to have a higher annual energy yield compared to a 2-terminal configuration. Additionally, scaling up the tandem device by using a 4 cm2 perovskite module on a 4 cm2 IBC silicon cell, a tandem efficiency of 25.3% was achieved, surpassing the stand-alone efficiency of the silicon cell.
'Adding perovskite on top of industrial silicon PV may prove to be the most cost-effective approach to further improve the efficiency of photovoltaics,' concludes Tom Aernouts, group leader for thin-film photovoltaics at imec/EnergyVille. 'Therefore, we invite all companies in the PV value chain that are looking into higher efficiencies, to partner with us and explore this promising path.'