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    Breaking News

    Graphene and Related Materials Inks Improve Solar Cells

    Graphene Flagship researchers have developed hybrids of graphene and MoS₂ quantum dots to stabilize perovskite solar cells.

    Graphene and Related Materials Inks Improve Solar Cells
    Source: Graphene Flagship.
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    04.18.19
    Imagine the environmental benefits if we could all simply paint solar cells onto the roof of our houses, or onto any surface for that matter. We could do this using perovskite solar cells (PSC), but, due to their instability, they have not yet been widely introduced. Now, researchers from the Graphene Flagship have developed hybrids of graphene and molybdenum disulphide quantum dots to stabilize PSCs.
     
    Progress in PSCs means that they are primed to become an affordable and flexible solar cell option for smart, low-intensity applications. This is because PSCs are less complex to produce, are made with cheaper materials and, due to their flexibility, can be used in locations where traditional silicon solar cells cannot be placed.
     
    A collaboration between the Graphene Flagship Partners Istituto Italiano di Technologia, University of Rome Tor Vergata, and BeDimensional resulted in a novel approach based on graphene and related materials to stabilize PSCs.
     
    PSCs are improving fast. When they were first developed in 2009, they had an initial efficiency of 3.8%. Today, they can achieve efficiencies above 22%. In comparison, silicon solar cells have been around since 1880, only reaching efficiency levels of 26.1% in 2018.
     
    The main weakness of PSCs is their instability. This is where the molybdenum disulfide quantum dot/graphene hybrids come into play. The collaboration between research institutions and industrial partners enabled by Graphene Flagship yielded an ink based on graphene and related materials (GRMs). Layering this over the PSCs saw them drastically increase the stability.
     
    Graphene was central, as molybdenum disulfide was anchored to reduced graphene oxide. This allowed for both materials’ properties to be applied and the ink not only increased the stability but also the performance of the PSC.
     
    “The Graphene Flagship was central to this development,” said Emanuel Kymakis, work package deputy leader for energy generation. “The funding and structure that was put in place were key to allowing new research teams to take part, such as the University of Rome Tor Vergata.”
     
    “Thanks to this research, we have overcome a major hurdle to adopting this new technology,” continued Kymakis. “With the new levels of stability and performance, we could see the mass adoption of PSCs in the next few years.”
     
    Once the PSCs stability is solved, attention can focus on scaling up production. Manufacturing PSCs requires solution processing, that can be ramped up to an industrial scale. Due to the flexibility, PSCs can be applied to nearly any surface and produce electricity.
     
    “The potential of graphene and related materials to improve solar cells has been recognized since the beginning of the Flagship,” Andrea C. Ferrari, science and technology officer of the Graphene Flagship and chair of its Management Panel, added. “Their combination with
     
    Reference:
     
    Graphene-Induced Improvements of Perovskite Solar Cell Stability: Effects on Hot-Carriers. P. O’Keeffe, D. Catone, A. Paladini, F. Toschi, S. Turchini, L. Avaldi, F. Martelli, A. Agresti, S. Pescetelli, A. E. Del Rio Castillo, F. Bonaccorso, A. Di Carlo. Nano Letters 2019, 19 (2), 684-691, DOI: 10.1021/acs.nanolett.8b03685.
     
     
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    • perovskite
    • ink
    • inks
    • solar cells
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