An innovation could make building printing cells as easy and inexpensive as printing a newspaper. A university team has cleared a critical manufacturing hurdle in the development of a relatively new class of solar devices called perovskite solar cells

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Dr. Hairen Tan and his team have cleared a critical manufacturing hurdle in the development of a relatively new class of solar devices called perovskite solar cells.

This alternative solar technology could lead to low-cost, printable solar panels capable of turning nearly any surface into a power generator.

"Perovskite solar cells can enable us to use techniques already established in the printing industry to produce solar cells at very low cost. Potentially, perovskites and silicon cells can be married to improve efficiency further, but only with advances in low-temperature processes."

He adds that perovskite solar cells using the older, high-temperature method are only marginally better at 22.1 per cent, and even the best silicon solar cells can only reach 26.3 per cent.

Many perovskite solar cells experience a severe drop in performance after only a few hours, but Tan's cells retained more than 90 per cent of their efficiency even after 500 hours of use.

"To augment the best silicon solar cells, next-generation thin-film technologies need to be process-compatible with a finished cell. This entails modest processing temperatures such as those in the Toronto group's advance reported in Science," said Professor Luping Yu of the University of Chicago's Department of Chemistry.

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