Polymer-Assisted Single-Step Slot-Die Coating of Flexible Perovskite Solar Cells at Mild Temperature from Dimethyl Sulfoxide

Francesco Bisconti, Antonella Giuri, Gianluigi Marra, Alberto Savoini, Paolo Fuma, Rosamaria Marrazzo, Stefano Zanardi, Gianni Corso, Riccardo Po, Paolo Biagini, Eleonora Quadrivi, Riikka Suhonen, Thomas Kraft, Mari Ylikunnari, Andrea Listorti, Carola Esposito Corcione, Silvia Colella, Aurora Rizzo

Research output: Contribution to journalArticleScientificpeer-review

9 Citations (Scopus)


The industrialization of perovskite solar cells relies on solving intrinsic-to-material issues. To reach record efficiencies perovskite deposition needs to be finely adjusted by multi-step processes, in a humidity free glove-box environment and by means of hardly scalable techniques often associated with toxic solvents and anti-solvent dripping/bath. Herein, the use of polymeric material is proposed to deposit perovskite layers with easy processability. To the scope, a starch-polymer/perovskite composite is developed to suit slot-die coating technique requirement, allowing the deposition of hybrid halide perovskite material in a single straightforward step without the use of toxic solvents, and in uncontrolled humid environment (RH up to 70 %). The starch-polymer increases the viscosity of the perovskite precursor solutions and delays the perovskite crystallization that results in the formation of perovskite films at mild temperature (60 °C) with good morphology. These innovative inks enables the fabrication of flexible solar cells with p-i-n configuration featured by a power conversion efficiency higher than 3 %. . Overall, this approach can be exploited in the future to massively reduce perovskite manufacturing costs related to keeping the entire fabrication line at high-temperature and under nitrogen or dry conditions.
Original languageEnglish
Pages (from-to)1442-1450
Number of pages9
Issue number10
Publication statusPublished - 14 Oct 2021
MoE publication typeA1 Journal article-refereed


  • perovskites
  • photovoltaic devices
  • polymers
  • slot-die coating
  • solar energy conversion


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