Recombination junctions for efficient monolithic perovskite-based tandem solar cells: Physical principles, properties, processing and prospects
Authorsde Bastiani, Michele
Subbiah, Anand Selvin
Isikgor, Furkan Halis
De Wolf, Stefaan
KAUST DepartmentKAUST Solar Center (KSC)
Physical Science and Engineering (PSE) Division
Material Science and Engineering Program
Permanent link to this recordhttp://hdl.handle.net/10754/665936
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AbstractCrystalline silicon (c-Si) solar cells comprise more than 95% of the photovoltaics (PV) market. At wafer-scale, this technology is gradually reaching its practical power conversion efficiency (PCE) limit. Therefore, new performance-driven and scalable alternatives must be developed to further increase the cost-competitiveness of PV. Stacked PV absorbers with decreasing bandgaps in a tandem configuration utilize more efficiently the solar spectrum, and can thereby overcome the single-junction efficiency limit of conventional solar cells. Specifically, the monolithic, two-terminal tandem solar cell implementation promises a simple, yet high-performance technology with high market-relevance. Metal-halide perovskite absorbers have attracted broad interest in their application as the top cell of such a c-Si based tandem solar cell configuration. Practically, the perovskite and c-Si subcells need to be electronically coupled, where the interfacial structure should guarantee efficient charge recombination of majority carriers (collected from each subcell), without inducing minority-carrier recombination. In this article, we review the mechanism underlying efficient recombination junctions, and discuss available materials systems for perovskite-based tandems, as well as additional requirements such as efficient light coupling into the subcells, processing compatibility, scalability of materials and methods, and stability. We extend our discussion beyond c-Si to thin-film bottom cell technologies such as low-bandgap perovskites and chalcogenides. We conclude with an outlook on considerations for industrialization of such interfacial structures. This journal is
CitationDe Bastiani, M., Subbiah, A. S., Aydin, E., Isikgor, F. H., Allen, T. G., & De Wolf, S. (2020). Recombination junctions for efficient monolithic perovskite-based tandem solar cells: physical principles, properties, processing and prospects. Materials Horizons, 7(11), 2791–2809. doi:10.1039/d0mh00990c
SponsorsThe authors acknowledge the support of the King Abdullah University of Science and Technology (KAUST) Office of Sponsored Research (OSR) under award no. KAUST OSR-CARF URF/1/3097, and KAUST OSR-CRG URF/1/3383.
PublisherRoyal Society of Chemistry (RSC)
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