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

By Kevin A. Bush, A. Palmstrom, Zhengshan J. Yu, M. Boccard, Rongrong Cheacharoen, Jonathan P. Mailoa, David P. McMeekin, R. Hoye, Colin D. Bailie, T. Leijtens and 13 more. Nature Energy, 2017

1,376 citations recorded by the source corpus.

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. Perovskite solar cells can complement silicon photovoltaics in multijunction devices. Here, the authors optimize light harvesting in monolithic perovskite-on-silicon devices and fabricate a certified 23.6% efficient, 1 cm2 tandem solar cell with a perovskite device that withstands damp heat tests.

Subfields: Electrical and Electronic Engineering, Materials Chemistry

View Paper: https://www.semanticscholar.org/paper/46f462851bab63f4425bf53f21c48853f21b7e05

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In Electrical and Electronic Engineering

1. H. Snaith
2. L. Herz
3. M. McGehee
4. M. Johnston
5. N. Park
6. A. Abate
7. Edward H. Sargent
8. J. Ball

In Materials Chemistry

1. H. Snaith
2. L. Herz
3. A. Abate
4. M. Johnston
5. J. Ball
6. M. McGehee
7. Edward H. Sargent
8. David P. McMeekin

Citations in the corpus

• Grain Engineering for Perovskite/Silicon Monolithic Tandem Solar Cells with Efficiency of 25.4% (2019, neutral): “The wafer was textured on one side using a potassium hydroxide solution, as detailed elsewhere.(11) The wafer was cleaned in piranha, RCA-B, and buffered oxide etchant solutions prior to deposition of amorphous silicon (a-Si:H) layers.”