Transparent Perovskite Cell

View through a perovskite solar cell made at ANU. (Source: J. Fox / ANU)

View through a perovskite solar cell made at ANU. (Source: J. Fox, ANU)

Researchers at ANU have found a new way to fabricate high efficiency semi-trans­parent perov­skite solar cells in a break­through that could lead to more efficient and cheaper solar elec­tricity. Tom White from the ANU Research School of Engineering said the new fabri­cation method signi­ficantly improved the performance of perovskite solar cells, which can combine with conven­tional silicon solar cells to produce more efficient solar elec­tricity.

He said perovs­kite solar cells were extremely good at making elec­tricity from visible light while conven­tional silicon solar cells were more efficient at con­verting infrared light into elec­tricity. “The prospect of adding a few addi­tional proces­sing steps at the end of a silicon cell production line to make perovs­kite cells is very exciting and could boost solar efficiency from 25 to 30 percent,” White said. “By combining these two cells, the perovs­kite cell and the silicon cell, we are able to make much better use of the solar energy and achieve higher effi­ciencies than either cell on its own.”

While perovs­kite cells can improve efficiency, they are not yet stable enough to be used on rooftops. White said the new fabri­cation technique could help develop more reliable perovs­kite cells. The new fabri­cation method involves adding a small amount of the element indium into one of the cell layers during fabrication. That could increase the cell’s power output by as much as 25 percent. “We have been able to achieve a record effi­ciency of 16.6 percent for a semi-trans­parent perovs­kite cell, and 24.5 percent for a perovs­kite-silicon tandem, which is one of the highest effi­ciencies reported for this type of cell,” said White. The development builds on the state-of-the-art silicon cell research at ANU and is part of a $12.2 million “High-effi­ciency silicon/perovskite solar cells” project led by Uni­versity of New South Wales and supported by $ 3.6 million of funding from the Austra­lian Renewable Energy Agency. (Source: ANU)

Link: Photovoltaics, ANU Research School of Engineering, Canberra, Australia


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