Issue 24, 2024

Efficient and stable perovskite solar cells via surface defect passivation using 4-fluorobenzamine trifluoroacetate

Abstract

Perovskite solar cells (PSCs) have achieved high power conversion efficiencies (PCEs). However, surface defects present a major challenge to further improving their performance. Fluorine-substituted materials have been widely utilized to passivate surface defects and improve the photovoltaic performance and stability of PSCs. In this study, post-treatment of the methylamine-lead iodide (MAPbI3) perovskite surface was performed using 4-fluoroaniline trifluoroacetate (P-F-PMATFA), and the surface defects of the perovskite were passivated via an F atom, which reduced the energy barrier between the perovskite film (PVK) and hole transport layer (HTL). Consequently, the PCE of P-F-PMATFA treated solar cells based on the MAPbI3 perovskite increased from 19.19 to 21.01% with low open-circuit voltage (VOC) loss (0.44 V). Further, P-F-PMATFA treated perovskite devices exhibited long-term stability, owing to the higher hydrophobicity of fluorinated materials. The post-treatment strategy demonstrated in this study shows wide application potential in the field of photovoltaic devices owing to its ability to passivate surface defects and improve material stability.

Graphical abstract: Efficient and stable perovskite solar cells via surface defect passivation using 4-fluorobenzamine trifluoroacetate

Supplementary files

Article information

Article type
Paper
Submitted
08 Apr 2024
Accepted
30 Oct 2024
First published
14 Nov 2024

Sustainable Energy Fuels, 2024,8, 5917-5926

Efficient and stable perovskite solar cells via surface defect passivation using 4-fluorobenzamine trifluoroacetate

Z. Chen, C. Sun, H. W. Qiao, J. Chen, X. Wang and Y. Yao, Sustainable Energy Fuels, 2024, 8, 5917 DOI: 10.1039/D4SE00473F

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