Efficient Near-Infrared-Transparent Perovskite Solar Cells Enabling Direct Comparison of 4-Terminal and Monolithic Perovskite/Silicon Tandem Cells

Jeremie Werner*, Loris Barraud, Arnaud Walter, Matthias Braeuninger, Florent Sahli, Davide Sacchetto, Nicolas Tetreault, Bertrand Paviet-Salomon, Soo-Jin Moon, Christophe Allebe, Matthieu Despeisse, Sylvain Nicolay, Stefaan De Wolf, Bjoern Niesen, Christophe Ballif

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

255 Scopus citations


Combining market-proven silicon solar cell technology with an efficient wide band gap top cell into a tandem device is an attractive approach to reduce the cost of photovoltaic systems. For this, perovskite solar cells are promising high-efficiency top cell candidates, but their typical device size (<0.2 cm2), is still far from standard industrial sizes. We present a 1 cm2 near-infrared transparent perovskite solar cell with 14.5% steady-state efficiency, as compared to 16.4% on 0.25 cm2. By mechanically stacking these cells with silicon heterojunction cells, we experimentally demonstrate a 4-terminal tandem measurement with a steady-state efficiency of 25.2%, with a 0.25 cm2 top cell. The developed top cell processing methods enable the fabrication of a 20.5% efficient and 1.43 cm2 large monolithic perovskite/silicon heterojunction tandem solar cell, featuring a rear-side textured bottom cell to increase its near-infrared spectral response. Finally, we compare both tandem configurations to identify efficiency-limiting factors and discuss the potential for further performance improvement.
Original languageEnglish
Pages (from-to)474-480
Number of pages7
JournalACS Energy Letters
Issue number2
StatePublished - Jul 30 2016
Externally publishedYes



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