The effect of antisolvent treatment on the growth of 2D/3D tin perovskite films for solar cells
File(s)
Author(s)
Type
Journal Article
Abstract
Antisolvent treatment is used in the fabrication of perovskite films to control grain growth during spin coating. We study widely incorporated aromatic hydrocarbons and aprotic ethers, discussing the origin of their performance differences in 2D/3D Sn perovskite (PEA0.2FA0.8SnI3) solar cells. Among the antisolvents that we screen, diisopropyl ether yields the highest power conversion efficiency in solar cells. We use a combination of optical and structural characterization techniques to reveal that this improved performance originates from a higher concentration of 2D phase, distributed evenly throughout the 2D/3D Sn perovskite film, leading to better crystallinity. This redistribution of the 2D phase, as a result of diisopropyl ether antisolvent treatment, has the combined effect of decreasing the Sn4+ defect density and background hole density, leading to devices with improved open-circuit voltage, short-circuit current, and power conversion efficiency.
Date Issued
2025-01-10
Date Acceptance
2024-12-03
Citation
ACS Energy Letters, 2025, 10 (1), pp.254-262
ISSN
2380-8195
Publisher
American Chemical Society
Start Page
254
End Page
262
Journal / Book Title
ACS Energy Letters
Volume
10
Issue
1
Copyright Statement
Copyright © 2024 The Authors. Published by American Chemical Society. This publication is licensed under
CC-BY 4.0 .
CC-BY 4.0 .
License URL
Identifier
https://pubs.acs.org/doi/10.1021/acsenergylett.4c02745
Publication Status
Published
Date Publish Online
2024-12-17