Journal
CHEMISTRY OF MATERIALS
Volume 25, Issue 22, Pages 4613-4618Publisher
AMER CHEMICAL SOC
DOI: 10.1021/cm402919x
Keywords
perovskites; hybrid solar cells; X-ray structures; DFT investigations
Funding
- CNR-EFOR
- MAAT- PON
- BEYOND-NANO-PON
- CNRPHOEBUS
- FP7-NMP project SANS
- MIST E-R Consortium
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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.
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