Proceedings of MATSUS23 & Sustainable Technology Forum València (STECH23) (MATSUS23)
DOI: https://doi.org/10.29363/nanoge.matsus.2023.374
Publication date: 22nd December 2022
In recent years, the interest in 2D materials and low-dimensional perovskites (LDP) as building blocks for photovoltaic devices has flourished. This is due to their chemical and electronic properties, which enable them to minimise performance losses and improve the stability of the devices. In this talk, it is presented an innovative strategy to improve the performances of inverted perovskite solar cells (PSC) by incorporating high-quality graphene flakes (GF) in the fullerene-based electron transporting layer (ETL) [1]. It has been proved that the so-formed ETL can be processed as a composite (Graphene:Fullerene) ultra-thin film atop the perovskite, reducing the defect-mediated recombination while creating preferential paths for the extraction of the electrons towards the current collector. Moreover, the properties and the synthesis of LDP based on thiophene cations will be discussed. At first, it will be shown how to control the properties of LDP: the optical and structural ones, and the segregation of different phases upon the modification of the halide composition. Indeed, the rational substitution of halides led to a spatial distribution of phases in the thin film, where the minor phase was responsible for the light emission while the major one gave a human-eye transparent appearance to the material [2]. Lastly, it will be discussed the implementation of this LDP in highly efficient PSC, giving rise to multidimensional 2D/3D perovskite heterostructure by means of two different passivation approaches.
[1] A.Zanetta, I.Bulfaro, F.Faini, M.Manzi, G.Pica, M.De Bastiani, S.Bellani, M.I.Zappia, G.Bianca, L.Gabatel, J.K.Panda, A.E.Del Rio Castillo, M.Prato, S.Lauciello, F.Bonaccorso, G.Grancini; Journal of Materials Chemistry A, 2023.
[2] A.Zanetta, Z.Andaji‐Garmaroudi, V.Pirota, G.Pica, F.U.Kosasih, L.Gouda, K.Frohna, C.Ducati, F.Doria, S.D.Stranks, G.Grancini; Advanced Materials, 34 (1), 2105942.
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