Berlin 2018 – scientific programme

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 46: Poster Session IV

CPP 46.21: Poster

Wednesday, March 14, 2018, 11:00–13:00, Poster A

Red-shifting the band gap of Perovskite photovoltaics using Sn/Pb metal mixtures — •Antonio Günzler and Michael Saliba — Adolphe Merkle Institute, Fribourg, Switzerland

Perovskite solar cells using only Pb at the metal position currently achieve record performances. Partial replacement of Pb by Sn has the advantage of using less toxic Pb.

In addition, Pb-Sn mixtures have an earlier absorption onset towards the near IR broadening the absorption spectrum. This is especially useful for thin-film perovskite-perovskite tandem cells already achieving up to 19% efficiency to date with the potential to reach values beyond 40%.

Furthermore, other optoelectronic applications require tunability of the band gap.

We aim to improve the fundamental understanding of the correlation between the perovskite structure and its optoelectronic properties under variation of the Sn content.