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Hybrid halide perovskites represent one of the most promising solutions toward the fabrication of all solid nanostructured solar cells, with improved efficiency and long-term stability. This article aims at investigating the structural properties of iodide/chloride mixed-halide perovskites and correlating them with their photovoltaic performances. We found out that, independent of the components ratio in the precursor solution, Cl incorporation in an iodide-based structure, is possible only at relatively low concentration levels (below 3–4%). However, even if the material band gap remains substantially unchanged, the Cl doping dramatically improves the charge transport within the perovskite layer, explaining the outstanding performances of meso-superstructured solar cells based on this material.
American Chemical Society
Publication date: 
11 Nov 2013

Silvia Colella, Edoardo Mosconi, Paolo Fedeli, Andrea Listorti, Francesco Gazza, Fabio Orlandi, Patrizia Ferro, Tullo Besagni, Aurora Rizzo, Gianluca Calestani, Giuseppe Gigli, Filippo De Angelis, Roberto Mosca

Biblio References: 
Volume: 25 Issue: 22 Pages: 4613-4618
Chemistry of Materials