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Low-temperature nanostructured electron-transporting layers (ETLs) for perovskite solar cells are grown by reactive sputtering at 160 °C with thickness in the range 22–76 nm and further stabilization in air at 180 °C to improve the lattice structure and to consequently reduce charge recombination during solar cell operation. In addition, the post-deposition treatment aims at leveling differences among samples to ensure material reproducibility. Nanostructured TiO2 has a further added value in promoting the structural coupling with the perovskite layer and establishing conformal interfaces in favor of the charge extraction from the active material. Nanostructuring of the ETLs also allows the shaping of the band gap width and position with a beneficial impact on the electrical parameters, as tested in standard architecture containing methylammonium lead iodide perovskites. A balance among parameters is achieved …
American Chemical Society
Publication date: 
16 Aug 2019

Alessandra Alberti, Emanuele Smecca, Salvatore Sanzaro, Corrado Bongiorno, Filippo Giannazzo, Giovanni Mannino, Antonino La Magna, Maning Liu, Paola Vivo, Andrea Listorti, Emanuele Calabro, Fabio Matteocci, Aldo Di Carlo

Biblio References: 
Volume: 2 Issue: 9 Pages: 6218-6229
ACS Applied Energy Materials