DOI: https://doi.org/10.29363/nanoge.pvspace.2022.016
Publication date: 8th June 2022
Over the last 10 years perovskite solar cells (PSCs) have emerged as credible contenders to conventional p-n junction photovoltaics. Their certified power conversion efficiency currently attains 25.7 %, exceeding that of conventional thin film devices. This lecture covers the recent evolution of PSCs, describing briefly their principles and current performance. Long term operational stability is a key requirement for their applications in space. We recently developed a promising strategy for the holistic passivation of perovskite films composed of FAPbI3 (band gap 1.53 eV) or FA65MA35Pb(I65Br35)3 (band gap 1.71 eV ) films, which encompasses bulk as well as surface treatment with a set of newly designed compounds. By performing an in- depth experimental investigation supported by computational modeling and comprising systematic structural variations we succeeded in suppressing the unwanted photoinduced halide phase segregation in the mixed I/Br halide compositions while augmenting sharply their power conversion efficiency.
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