π-Conjugated Materials as the Hole-Transporting Layer in Perovskite Solar Cells

Abstract : Hybrid organometal halide perovskites have attracted much attention these past four years as the new active layer for photovoltaic applications. Researches are now intensively focused on the stability issues of these solar cells, the process of fabrication and the design of innovative materials to produce efficient perovskite devices. In this review, we highlight the recent progress demonstrated in 2015 in the design of new π-conjugated organic materials used as hole transporters in such solar cells. Indeed, several of these " synthetic metals " have been proposed to play this role during the last few years, in an attempt to replace the conventional 2,2 1 ,7,7 1-tetrakis-(N,N-di-4-methoxyphenylamino)-9,9 1-spirobifluorene (Spiro-OMeTAD) reference. Organic compounds have the benefits of low production costs and the abundance of raw materials, but they are also crucial components in order to address some of the stability issues usually encountered by this type of technology. We especially point out the main design rules to reach high efficiencies.
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Alexandre Gheno, Sylvain Vedraine, Bernard Ratier, Johann Bouclé. π-Conjugated Materials as the Hole-Transporting Layer in Perovskite Solar Cells. Metals, MDPI, 2016, Special Issue - Synthetic Metals, 6 (1), 〈10.3390/met6010021〉. 〈hal-01254561〉

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