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    Optical enhancement of a printed organic tandem solar cell using diffractive nanostructures

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    Author
    Mayer, J. A.; Offermans, T.; Chrapa, M.; Pfannmoller, M.; Bals, S.; Ferrini, R.; et al.
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    Abstract
    Solution processable organic tandem solar cells offer a promising approach to achieve cost-effective, lightweight and flexible photovoltaics. In order to further enhance the efficiency of optimized organic tandem cells, diffractive light-management nanostructures were designed for an optimal redistribution of the light as function of both wavelength and propagation angles in both sub-cells. As the fabrication of these optical structures is compatible with roll-to-roll production techniques such as hot-embossing or UV NIL imprinting, they present an optimal cost-effective solution for printed photovoltaics. Tandem cells with power conversion efficiencies of 8-10% were fabricated in the ambient atmosphere by doctor blade coating, selected to approximate the conditions during roll-to-roll manufacturing. Application of the light management structure onto an 8.7% efficient encapsulated tandem cell boosted the conversion efficiency of the cell to 9.5%. (C) 2018 Optical Society of America under the terms of the OSA Open Access Publishing Agreement
    Publication Reference
    Optics Express, vol. 26 (6), pp. A240-A250, Mar 2018.
    Year
    2018
    URI
    https://yoda.csem.ch/handle/20.500.12839/231
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