Camphorsulfonic-Salified Chitosan Allowing MACl-Free Stabilization of Pure FAPbI3 α-Phase via Gravure Printing in Ambient Air

Nadir Vanni, Antonella Giuri, Mario Calora, Edoardo Podda, Anna Paola Caricato, Katia Sparnacci, Riikka Suhonen, Mari Ylikunnari, Amanda Covarelli, Luca Gregori, Filippo De Angelis, Gianluigi Marra, Paolo Biagini, Riccardo Po, Aurora Rizzo*

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

5 Citations (Scopus)

Abstract

Metal–halide perovskites have gained extreme interest in the photovoltaic field with formamidinium lead iodide (FAPbI3) currently being one of the best-performing materials for single-junction solar cells. Despite the outstanding record efficiencies, there are still several major issues hindering the large-scale fabrication of perovskite solar cells. The vulnerability to environmental agents along with the need of controlled atmosphere and crystallization aids for the perovskite film deposition represents the major roadblocks. This is particularly true for FAPbI3 for which the thermodynamically stable phase at room temperature is photovoltaically inactive δ-phase. To address those challenges, herein, a camphorsulfonic-salified chitosan is specifically designed with the aid of DTF calculations to strongly interact with the perovskite and, as a result, improve the morphology and optoelectronic quality of the FAPbI3. Thanks to the numerous interactions and then the modulation of the solution viscosity, FAPbI3 devices are fabricated by gravure printing deposition without either antisolvent bath or inclusion of methylammonium chloride (MACl) as additive. The gravure-printed devices with the chitosan feature an enhanced efficiency and stability in air, retaining 80% of the original efficiency after 1200 h in ambient air without any encapsulation.

Original languageEnglish
Article number2400612
JournalSolar RRL
Volume8
Issue number22
DOIs
Publication statusPublished - Nov 2024
MoE publication typeA1 Journal article-refereed

Funding

N.V. gratefully acknowledges the project \u201CProgramma Operativo Nazionale Ricerca e Innovazione 2014\u20132020 (CCI 2014IT16M2OP005), risorse FSE REACT\u2010EU, Azione IV.4 \u201CDottorati e contratti di ricerca su tematiche dell'innovazione\u201D e Azione IV.5 \u201CDottorati su tematiche Green\u201D scholarship code DOT1712250, CUP F85F21005760001. The authors acknowledge the project \u201CSviluppo di celle solari a base di perovskite depositata in aria con additivi molecolari e polimerici\u201D contract no. 3500056481 founded by ENI Spa and the project \u201Cnuovi Concetti, mAteriali e tecnologie per l'iNtegrazione del fotoVoltAico negli edifici in\u2009uno scenario di generazione diffuSa\u201D [CANVAS], funded by the Italian Ministry of the Environment and the Energy Security, through the Research Fund for the Italian Electrical System (type\u2010A call, published on G.U.R.I. n. 192 on 18\u201008\u20102022). A.R. and A.G. gratefully acknowledge the PNRR MUR project: \u201CIntegrated Infrastructure Initiative in Photonic and Quantum Sciences\u201D \u2010 I\u2010PHOQS (IR0000016); A.R. and A.G. gratefully acknowledge the project \u201CMission Innovation, IEMAP\u201D founded by Ministero della Transizione Ecologica, MiTE (CUP B82C21001820001). A.R. acknowledges the project Ricerca@Cnr VertiGrow (CUP B15F21004410005). The authors gratefully acknowledge Sonia Carallo for technical support. R.S. and M.Y. acknowledge the support of the Research Council of Finland Flagship Programme, Photonics Research and Innovation (PREIN), decision number 346545, and Research Council of Finland, Printed intelligence infrastructure funding, decision 358621.

Keywords

  • ambient air deposition
  • FAPbI
  • formamidinium lead iodide
  • gravure printing deposition
  • perovskite solar cells
  • polymeric additives

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