ABSTRACT

Perovskite solar cells with carbon back contact (C-PSC) represent a promising architecture that allows for a simplification of the manufacture process and a stabilization of the cell performances. In this work, we designed a fully printable C-PSC using a homemade mesoporous alumina (Al 2 O 3 ) ink. By increasing the alumina layer thickness we show that fill factor reduces, short-circuit current increases, while open circuit voltage increases until a thickness of 1.2 μm. In order to improve performances of PSCs, we investigated a water pre-treatment before perovskite deposition. We show that water pre-treatment improves pore filling, leads to a reduction of charge recombination, and improves the conversion of PbI 2 crystals into perovskite. The water pre-treatment permits to obtain an average efficiency increasing of 16% with respect to cells without water pre-treatment.

Jessica Barichello, Luigi Vesce, Fabio Matteocci, Enrico Lamanna, Aldo Di Carlo

DOI: 10.1016/j.solmat.2019.03.029

Solar Energy Materials and Solar Cells 197 (2019) 76–83

https://www.sciencedirect.com/science/article/pii/S0927024819301485