Issue 11, 2021

Construction and mechanistic understanding of high-performance all-air-processed perovskite solar cells via mixed-cation engineering

Abstract

All-air-processed perovskite solar cells (PSCs) have attracted increasing attention due to their low cost and simplified manufacturing processes. At present, there is a need to fabricate efficient and stable PSCs in the air. In this work, dense perovskite films with a large grain size and low trap-state density can be obtained, when 30% of formamidinium (FA+) is incorporated into methylammonium lead iodide (MAPbI3). The champion device with a planar architecture of FTO/SnO2/FA0.3MA0.7PbI3/Spiro-OMeTAD/Au achieves a maximum power conversion efficiency (PCE) of 19.50%, which is one of the highest efficiencies yet reported for all-air-processed PSCs. In addition, the unencapsulated device exhibits excellent long-term stability and remarkable thermal stability, retaining over 85% of its original PCE after storage in ambient atmosphere for 90 days (>2100 h) and over 84% efficiency after storage at 100 °C for 27 h without inert conditions. Furthermore, the mechanisms underlying the improved performance are revealed through powerful characterization techniques and density functional theory calculations. Our work provides a facile strategy for the development of a new generation of fully air-processed PSCs for commercialization.

Graphical abstract: Construction and mechanistic understanding of high-performance all-air-processed perovskite solar cells via mixed-cation engineering

Supplementary files

Article information

Article type
Research Article
Submitted
28 jan 2021
Accepted
25 mar 2021
First published
26 mar 2021

Mater. Chem. Front., 2021,5, 4244-4253

Construction and mechanistic understanding of high-performance all-air-processed perovskite solar cells via mixed-cation engineering

W. Zhang, L. He, Y. Li, D. Tang, X. Li and L. Chang, Mater. Chem. Front., 2021, 5, 4244 DOI: 10.1039/D1QM00149C

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