Cation-Diffusion-Based Simultaneous Bulk and Surface Passivations for High Bandgap Inverted Perovskite Solar Cell Producing Record Fill Factor and Efficiency

Mahmud, MA; Zheng, J; Tang, S; Wang, G; Bing, J; Bui, AD; Qu, J; Yang, L; Liao, C; Chen, H; Bremner, SP; Nguyen, HT; Cairney, J; Ho-Baillie, AWY

Cation-Diffusion-Based Simultaneous Bulk and Surface Passivations for High Bandgap Inverted Perovskite Solar Cell Producing Record Fill Factor and Efficiency

Mahmud, MA Zheng, J Tang, S Wang, G Bing, J Bui, AD Qu, J Yang, L

Liao, C Chen, H Bremner, SP Nguyen, HT Cairney, J Ho-Baillie, AWY

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Publisher:: Wiley
Publication Type:: Journal Article
Citation:: Advanced Energy Materials, 2022, 12, (36), pp. 2201672
Issue Date:: 2022-09-01

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Field	Value	Language
dc.contributor.author	Mahmud, MA
dc.contributor.author	Zheng, J
dc.contributor.author	Tang, S
dc.contributor.author	Wang, G
dc.contributor.author	Bing, J
dc.contributor.author	Bui, AD
dc.contributor.author	Qu, J
dc.contributor.author	Yang, L https://orcid.org/0000-0003-0123-1540
dc.contributor.author	Liao, C
dc.contributor.author	Chen, H
dc.contributor.author	Bremner, SP
dc.contributor.author	Nguyen, HT
dc.contributor.author	Cairney, J
dc.contributor.author	Ho-Baillie, AWY
dc.date.accessioned	2023-03-20T23:49:41Z
dc.date.available	2023-03-20T23:49:41Z
dc.date.issued	2022-09-01
dc.identifier.citation	Advanced Energy Materials, 2022, 12, (36), pp. 2201672
dc.identifier.issn	1614-6832
dc.identifier.issn	1614-6840
dc.identifier.uri	http://hdl.handle.net/10453/167826
dc.description.abstract	High bandgap perovskite solar cells are integral to perovskite-based multi-junction tandem solar cells with efficiency potentials over 40%. However, at present, high bandgap perovskite devices underperform compared to their mid bandgap counterparts in terms of voltage outputs and fill factors resulting in lower than ideal efficiencies. Here, the low fill factor aspect of high bandgap perovskite is addressed by developing a cation-diffusion-based double-sided interface passivation scheme that simultaneously provides bulk passivation for a 1.75 eV perovskite cell that is also compatible with a p-i-n cell architecture. The champion cell achieves a record fill factor of 86.5% and a power conversion efficiency of 20.2%. Results of ionic distribution profiling, Fourier transform infrared spectroscopy, and X-ray diffraction crystallography reveal evidence of cation diffusion from the surface perovskite passivation layer into bulk. The diffused cations reduce Shockley–Read–Hall recombination in the perovskite bulk and at the surfaces with the latter being more dominant as confirmed by light-intensity dependent and temperature-dependent open-circuit voltage measurements as well as thermal admittance spectroscopy. This concurrent bulk and surface passivation scheme renders record fill factor and efficiency in the double-side passivated cells. This provides new insights for future passivation strategies based on ionic diffusion of functionalized materials.
dc.language	en
dc.publisher	Wiley
dc.relation.ispartof	Advanced Energy Materials
dc.relation.isbasedon	10.1002/aenm.202201672
dc.rights	info:eu-repo/semantics/openAccess
dc.subject	0303 Macromolecular and Materials Chemistry, 0912 Materials Engineering, 0915 Interdisciplinary Engineering
dc.title	Cation-Diffusion-Based Simultaneous Bulk and Surface Passivations for High Bandgap Inverted Perovskite Solar Cell Producing Record Fill Factor and Efficiency
dc.type	Journal Article
utslib.citation.volume	12
utslib.for	0303 Macromolecular and Materials Chemistry
utslib.for	0912 Materials Engineering
utslib.for	0915 Interdisciplinary Engineering
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology/School of Civil and Environmental Engineering
utslib.copyright.status	open_access	*
dc.date.updated	2023-03-20T23:49:40Z
pubs.issue	36
pubs.publication-status	Published
pubs.volume	12
utslib.citation.issue	36

Abstract:

High bandgap perovskite solar cells are integral to perovskite-based multi-junction tandem solar cells with efficiency potentials over 40%. However, at present, high bandgap perovskite devices underperform compared to their mid bandgap counterparts in terms of voltage outputs and fill factors resulting in lower than ideal efficiencies. Here, the low fill factor aspect of high bandgap perovskite is addressed by developing a cation-diffusion-based double-sided interface passivation scheme that simultaneously provides bulk passivation for a 1.75 eV perovskite cell that is also compatible with a p-i-n cell architecture. The champion cell achieves a record fill factor of 86.5% and a power conversion efficiency of 20.2%. Results of ionic distribution profiling, Fourier transform infrared spectroscopy, and X-ray diffraction crystallography reveal evidence of cation diffusion from the surface perovskite passivation layer into bulk. The diffused cations reduce Shockley–Read–Hall recombination in the perovskite bulk and at the surfaces with the latter being more dominant as confirmed by light-intensity dependent and temperature-dependent open-circuit voltage measurements as well as thermal admittance spectroscopy. This concurrent bulk and surface passivation scheme renders record fill factor and efficiency in the double-side passivated cells. This provides new insights for future passivation strategies based on ionic diffusion of functionalized materials.

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http://hdl.handle.net/10453/167826