New perovskite-silicon tandem solar cells are more efficient

Solar cells

Researchers at the Hong Kong Polytechnic University (PolyU) successfully developed new perovskite-silicon tandem solar cells that reportedly have the world’s highest power conversion efficiency to date.

PolyU researchers claim a 25.5 percent power conversion efficiency rate with their new perovskite-silicon tandem solar cells, which bests the previous high efficiency mark that was achieved in Switzerland.

Quick progress with perovskite solar cells

Perovskite solar cells first appeared in the solar scene back in 2009. The original perovskite solar cells had an efficiency of just 3.8 percent, so there has been remarkable progress in efficiency of these cells in a relatively short amount of time.

Perovskite is a calcium titanium oxide mineral that is relatively cheap to use and conducts electricity well. PolyU researchers paired perovskite with a layer of silicon — a flexible material commonly used in solar panels — to create a hybrid perovskite-silicon tandem solar cell.

It is this hybrid cell that performed at record efficiency — 25.5 percent.

More affordable solar panels

The researchers behind this new, highly-efficient tandem perovskite-silicon solar cell think this innovation can help lower the cost of solar power. Increased efficiency means that more power can be generated with the same materials and the same cost.

Orginally published on → E-Wisdom