perovskite-silicon tandem cells

CEA-INES researchers and Enel have developed a new solar cell with an active area of 9 cm² and an open-circuit voltage above 1,900 mV. Their results improve on the 27.1% efficiency they achieved for the same kind of cell in June.

Researchers at Germany’s Fraunhofer ISE have provided guidelines for future research on perovskite-silicon tandem solar cells by identifying the most significant loss mechanisms at the perovskite/ETL interface, in the series resistance, and in light management.

Voltec and the Institut Photovoltaïque d’Île-de-France (IPVF) plan to set up a pilot line for their new tandem panel tech in 2023 and their first 200 MW industrial demonstrator in 2025. They also plan to increase the factory’s capacity to 1 GW in 2027 and 5 GW by 2030.

A group of international researchers has developed a new perovskite-silicon solar cell design using a top perovskite PV device with an energy bandgap of 1.67 eV and a new self-assembly monolayer based on carbazole. The tandem cell achieved a higher efficiency compared to counterparts without the monolayer and passed the IEC 61215 standard thermal cycling test.

The US Department of Energy’s National Renewable Energy Laboratory (NREL) has confirmed Longi’s achievement of a world record-breaking efficiency rating of 33.9% for a perovskite-silicon tandem solar cell.

US scientists have achieved a breakthrough in PV cell tech by creating a 24 cm2 perovskite-silicon tandem solar cell. It positions a lithium fluoride interlayer between a hole transport layer and the perovskite absorber to reduce shunting losses.

The Fraunhofer ISE has developed an electro-optically optimized transparent conductive oxide layer that can reportedly improve the efficiency of perovskite-silicon tandem solar cells. A device built with the film achieved remarkable efficiency and fill factor.

Fraunhofer ISE is leading a project that is developing methods to characterize perovskite-based tandem modules, in an effort to facilitate their industrial implementation. A specially built Wavelabs solar simulator is now being used at the institute’s CalLab PV Modules. 

Kaneka’s two-terminal tandem perovskite solar cell has achieved the highest efficiency ever recorded for such a device based on an industrial Czochralski (CZ) silicon wafer. It has an open-circuit voltage of 1.929 V, a short-circuit current density of 19.5 mA cm−2, and a fill factor of 77.55%.

Scientists in China found that a change to the hole transport layer material helped to reduce voltage loss in a perovskite solar cell. The discovery demonstrates a promising new pathway to overcoming a major challenge for perovskites – particularly those used as the top layer in a tandem device.