A 2-terminal perovskite/silicon multijunction solar cell enabled by a silicon tunnel junction

By Jonathan P. Mailoa, Colin D. Bailie, E. Johlin, Eric T. Hoke, A. Akey, W. H. Nguyen, M. McGehee, Tonio Buonassisi. 2015

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With the advent of efficient high-bandgap metal-halide perovskite photovoltaics, an opportunity exists to make perovskite/silicon tandem solar cells. We fabricate a monolithic tandem by developing a silicon-based interband tunnel junction that facilitates majority-carrier charge recombination between the perovskite and silicon sub-cells. We demonstrate a 1 cm2 2-terminal monolithic perovskite/silicon multijunction solar cell with a VOC as high as 1.65 V. We achieve a stable 13.7% power conversion efficiency with the perovskite as the current-limiting sub-cell, and identify key challenges for this device architecture to reach efficiencies over 25%.

Subfields: Atomic and Molecular Physics, and Optics, Electrical and Electronic Engineering

View Paper: https://www.semanticscholar.org/paper/f81cdb74d32f30686c1bccd78f51721165b31a60