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Tandem solar cells have the potential to improve photon conversion efficiencies (PCEs) beyond the limits of single‐junction devices. In this study, a triple‐junction tandem design is demonstrated by employing three distinct organic donor materials having bandgap energies ranging from 1.4 to 1.9 eV. Through optical modeling, balanced photon absorption rates are achieved and, thereby, the photocurrents...
Polymer tandem solar cells with 10.2% power conversion efficiency are demonstrated via stacking two PDTP‐DFBT:PC71BM bulk heterojunctions, connected by MoO3/PEDOT:PSS/ZnO as an interconnecting layer. The tandem solar cells increase the power conversion efficiency of the PDTP‐DFBT:PC71BM system from 8.1% to 10.2%, successfully demonstrating polymer tandem solar cells with identical sub‐cells of double‐digit...
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