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Ultra-stable perovskite solar cell remains stable for more than a year

01.06.2017

Perovskite solar cells promise cheaper and efficient solar energy, with enormous potential for commercialization. But even though they have been shown to achieve over 22% power-conversion efficiency, their operational stability still fails market requirements. Despite a number of proposed solutions in fabrication technology, this issue has continued to undercut whatever incremental increases in efficiency have been achieved. EPFL scientists have now built a low-cost, ultra-stable perovskite solar cell that has operated for more than a year without loss in performance (11.2%). The work is published in Nature Communications.

The lab of Mohammad Khaja Nazeeruddin at EPFL in collaboration with Michael Grätzel and Solaronix company has engineered what is known as 2D/3D hybrid perovskite solar cell. This combines the enhanced stability of 2D perovskites with 3D forms, which efficiently absorb light across the entire visible spectrum and transport electrical charges.


This is a schematic representation of the findings of this study.

Credit: MK Nazeeruddin/EPFL

In this way, the scientists were able to fabricate of efficient and ultra-stable solar cells, which is a crucial step for upscaling to a commercial level. The 2D/3D perovskite yields efficiencies of 12.9% (carbon-based architecture), and 14.6% (standard mesoporous solar cells).

The scientists built 10x10 cm2 solar panels using a fully printable industrial-scale process. The resulting solar cells have now delivered a constant 11.2% efficiency for more than 10,000 hours, while showing zero loss in performance as measured under standard conditions.

The breakthrough resolves the problem of perovskite solar-cell stability, and can viably move the technology into the commercial sphere.

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This work was funded by the Marie Curie Institute, the Horizon 2020 program, the European Union Seventh Framework Programme (FP7/2007-2013) and Solaronix.

Reference

G. Grancini, C. Roldán-Carmona, I. Zimmermann, E. Mosconi, X. Lee, D. Martineau, S. Narbey, F. Oswald, F. De Angelis, M. Graetzel, M.K. Nazeeruddin. One-Year stable perovskite solar cells by 2D/3D interface engineering. Nature Communications 01 June 2017. DOI: 10.1038/ncomms15684

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Nik Papageorgiou | EurekAlert!

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