Oxford PV

Andries Wantenaar, a solar analyst at Rethink Energy, explains why he sees a bright future for perovskite PV cells, with technological advancements and major R&D investment paving the way for revolutionary change.

Oxford PV, a leading perovskite solar pv company with operations in England and Germany, achieved power conversion efficiency of 28.6% for a two-terminal perovskite-silicon tandem cell measuring 258.15 cm² cell: A world record for a device based on a ‘full size’ silicon wafer. The record was certified by Fraunhofer Institute for Solar Energy Systems (Fraunhofer ISE).

As efficiency records tumble and devices become more stable, Europe is seeing the beginnings of a race to commercialize high-efficiency perovskite-silicon tandem solar products, reports Valerie Thompson.

A life-cycle analysis of perovskite-silicon tandem modules indicates that additional environmental impacts in manufacturing are more than offset by the higher energy yield over their lifetime.

While Europe was previously a leader in the manufacturing of solar cells and modules, the plans falling into place this year already represent a scale never before seen on the continent. And they’ll need that scale if Europe is to meet expected demand for new solar over the coming decades, without relying heavily on imported products and components. Many of the technologies at the center of these plans are brand new as well; pv magazine looks at a few of the innovators planning to scale up alongside more mainstream players, and how these fit into plans for a fully fledged European PV supply chain.

The work undertaken separately by seven academics to discover the promise of perovskite materials for solar, and to open the door to high-efficiency devices, has been recognized by the judges of the Rank Prize for Optoelectronics.

Last week’s announcement Oxford PV wants to wind up its “exclusive cooperation” with Meyer Burger after the fit out of its 100 MW German factory points to a potential divergence in strategies. And with Meyer Burger considering legal action in response, it could result in a messy, disruptive separation.

Meyer Burger claims machines to produce perovskite tandem solar cells are still missing at Oxford PV’s manufacturing plant in Germany’s Brandenburg an der Havel. Despite this, Oxford PV terminated the cooperation with the turnkey machine supplier in a surprise move last week. The Swiss technology group, which now produces its own heterojunction solar cells and modules in Germany, is now considering legal action.

Perovskite tandem developer Oxford PV has completed the fit out of its 100 MW tandem cell line in Brandenburg, Germany – although the company awaits for the delivery of one perovskite deposition tool, which would complete the high efficiency cell process. Oxford PV, which in December 2020 hit a new world record cell efficiency of 29.52%, hopes to begin commercial production in early 2022.

Perovskite developer Oxford PV has set a new world record for perovskite-silicon tandem cell efficiency at 29.52%, edging out the previous record set less than a year ago by Helmholtz Zentrum Berlin. The new record has been certified by the U.S. National Renewable Energy Laboratory.