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Issue 3, 2015
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Organic–inorganic halide perovskite/crystalline silicon four-terminal tandem solar cells

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Tandem solar cells constructed from a crystalline silicon (c-Si) bottom cell and a low-cost top cell offer a promising way to ensure long-term price reductions of photovoltaic modules. We present a four-terminal tandem solar cell consisting of a methyl ammonium lead triiodide (CH3NH3PbI3) top cell and a c-Si heterojunction bottom cell. The CH3NH3PbI3 top cell exhibits broad-band transparency owing to its design free of metallic components and yields a transmittance of >55% in the near-infrared spectral region. This allows the generation of a short-circuit current density of 13.7 mA cm−2 in the bottom cell. The four-terminal tandem solar cell yields an efficiency of 13.4% (top cell: 6.2%, bottom cell: 7.2%), which is a gain of 1.8%abs with respect to the reference single-junction CH3NH3PbI3 solar cell with metal back contact. We employ the four-terminal tandem solar cell for a detailed investigation of the optical losses and to derive guidelines for further efficiency improvements. Based on a power loss analysis, we estimate that tandem efficiencies of ∼28% are attainable using an optically optimized system based on current technology, whereas a fully optimized, ultimate device with matched current could yield up to 31.6%.

Graphical abstract: Organic–inorganic halide perovskite/crystalline silicon four-terminal tandem solar cells

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The article was received on 23 Aug 2014, accepted on 14 Nov 2014 and first published on 17 Nov 2014

Article type: Paper
DOI: 10.1039/C4CP03788J
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Citation: Phys. Chem. Chem. Phys., 2015,17, 1619-1629

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    Organic–inorganic halide perovskite/crystalline silicon four-terminal tandem solar cells

    P. Löper, S. Moon, S. Martín de Nicolas, B. Niesen, M. Ledinsky, S. Nicolay, J. Bailat, J. Yum, S. De Wolf and C. Ballif, Phys. Chem. Chem. Phys., 2015, 17, 1619
    DOI: 10.1039/C4CP03788J

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