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  • Title: 10.5% efficient polymer and amorphous silicon hybrid tandem photovoltaic cell.
    Author: Kim J, Hong Z, Li G, Song TB, Chey J, Lee YS, You J, Chen CC, Sadana DK, Yang Y.
    Journal: Nat Commun; 2015 Mar 04; 6():6391. PubMed ID: 25736823.
    Abstract:
    Thin-film solar cells made with amorphous silicon (a-Si:H) or organic semiconductors are considered as promising renewable energy sources due to their low manufacturing cost and light weight. However, the efficiency of single-junction a-Si:H or organic solar cells is typically <10%, insufficient for achieving grid parity. Here we demonstrate an efficient double-junction photovoltaic cell by employing an a-Si:H film as a front sub-cell and a low band gap polymer:fullerene blend film as a back cell on planar glass substrates. Monolithic integration of 6.0% efficienct a-Si:H and 7.5% efficient polymer:fullerene blend solar cells results in a power conversion efficiency of 10.5%. Such high-efficiency thin-film tandem cells can be achieved by optical management and interface engineering of fully optimized high-performance front and back cells without sacrificing photovoltaic performance in both cells.
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