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Tin- perovskite solar cell (Sn-PSC) is limited by their poor stability arising from facile tin oxidation and uncontrolled film growth. Here, we introduced a multifunctional bidentate ligand, formohydrazide (FHZ) as an additive into FASnI3 perovskite film. This additive is found to be effective for the control of Sn-oxidation and forms pin-hole free film morphology. The Sn-PSCs with FHZ additive enhanced the device efficiency from 9.93% (for control Sn-HaP) to 13.14 % (for device with FHZ additive) with higher reproducibility and superior device stability. The device analysis suggests that the hydrazide additive significantly passivates the bulk and surface defect in the Sn-PSCs. This report gives insights into the film growth properties, device photo-physics, and defect analysis correlating with device performance and device stability.

Data origin type: other

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Keyword: Sn-perovskite, Sn-oxidation, bidentate ligand, Stability, Device

Date published: 2023-06-11

Publisher: IEEE

Journal:

• 2023 IEEE 50th Photovoltaic Specialists Conference (PVSC)

Funding:

Manuscript type: Author's version (Accepted manuscript)

MDR DOI: https://doi.org/10.48505/nims.4754

First published URL: https://doi.org/10.1109/pvsc48320.2023.10359837

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Updated at: 2024-09-17 16:30:25 +0900

Published on MDR: 2024-09-17 16:30:25 +0900