23.6%-efficient monolithic perovskite/silicon tandem solar cells with improved stability

Bush KA, Palmstrom AF, Yu ZJ, Boccard M, Cheacharoen R, Mailoa JP, Mcmeekin DP, Hoye RLZ, Bailie CD, Leijtens T, Peters IM, Minichetti MC, Rolston N, Prasanna R, Sofia S, Harwood D, Ma W, Moghadam F, Snaith HJ, Buonassisi T, Holman ZC, Bent SF, Mcgehee MD (2017)

Publication Type: Journal article

Publication year: 2017

Journal

Nature Energy Nature Publishing Group

Book Volume: 2

Article Number: 17009

Journal Issue: 4

DOI: 10.1038/nenergy.2017.9

Abstract

As the record single-junction efficiencies of perovskite solar cells now rival those of copper indium gallium selenide, cadmium telluride and multicrystalline silicon, they are becoming increasingly attractive for use in tandem solar cells due to their wide, tunable bandgap and solution processability. Previously, perovskite/silicon tandems were limited by significant parasitic absorption and poor environmental stability. Here, we improve the efficiency of monolithic, two-terminal, 1-cm2 perovskite/silicon tandems to 23.6% by combining an infrared-tuned silicon heterojunction bottom cell with the recently developed caesium formamidinium lead halide perovskite. This more-stable perovskite tolerates deposition of a tin oxide buffer layer via atomic layer deposition that prevents shunts, has negligible parasitic absorption, and allows for the sputter deposition of a transparent top electrode. Furthermore, the window layer doubles as a diffusion barrier, increasing the thermal and environmental stability to enable perovskite devices that withstand a 1,000-hour damp heat test at 85 °C and 85% relative humidity.

Involved external institutions

Stanford University US United States (USA) (US) Arizona State University (ASU) US United States (USA) (US) Massachusetts Institute of Technology (MIT) US United States (USA) (US) University of Oxford GB United Kingdom (GB) D2solar US United States (USA) (US) Sunpreme US United States (USA) (US)

How to cite

APA:

Bush, K.A., Palmstrom, A.F., Yu, Z.J., Boccard, M., Cheacharoen, R., Mailoa, J.P.,... Mcgehee, M.D. (2017). 23.6%-efficient monolithic perovskite/silicon tandem solar cells with improved stability. Nature Energy, 2(4). https://doi.org/10.1038/nenergy.2017.9

MLA:

Bush, Kevin A., et al. "23.6%-efficient monolithic perovskite/silicon tandem solar cells with improved stability." Nature Energy 2.4 (2017).

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