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Alumina Nanoparticle Interfacial Buffer Layer for Low-Bandgap Lead-Tin Perovskite Solar Cells

Documentation:: Mixed lead-tin (Pb:Sn) halide perovskites are promising absorbers withnarrow-bandgaps (1.25–1.4 eV) suitable for high-eﬃciency all-perovskitetandem solar cells. However, solution processing of optimally thick Pb:Snperovskite ﬁlms is notoriously diﬃcult in comparison with their neat-Pbcounterparts. This is partly due to the rapid crystallization of Sn-basedperovskites, resulting in ﬁlms that have a high degree of roughness. Rougherﬁlms are harder to coat conformally with subsequent layers usingsolution-based processing techniques leading to contact between theabsorber and the top metal electrode in completed devices, resulting in a lossof VOC , ﬁll factor, eﬃciency, and stability. Herein, this study employs anon-continuous layer of alumina nanoparticles distributed on the surface ofrough Pb:Sn perovskite ﬁlms. Using this approach, the conformality of thesubsequent electron-transport layer, which is only tens of nanometres inthickness is improved. The overall maximum-power-point-tracked eﬃciencyimproves by 65% and the steady-state VOC improves by 28%. Application ofthe alumina nanoparticles as an interfacial buﬀer layer also results in highlyreproducible Pb:Sn solar cell devices while simultaneously improving devicestability at 65 °C under full spectrum simulated solar irradiance. Aged devicesshow a six-fold improvement in stability over pristine Pb:Sn devices,increasing their lifetime to 120 h

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APA Style

Jin, H., Farrar, M., Ball, J., Dasgupta, A., Caprioglio, P., Narayanan, S., Oliver, R., Rombach, F., Putland, B., Johnston, M., & Snaith, H. (2024). Alumina Nanoparticle Interfacial Buffer Layer for Low-Bandgap Lead-Tin Perovskite Solar Cells. University of Oxford.

MLA Style

Jin, H., et al. Alumina Nanoparticle Interfacial Buffer Layer for Low-Bandgap Lead-Tin Perovskite Solar Cells. University of Oxford, 2024.

Chicago Style

Jin, H, M Farrar, J Ball, A Dasgupta, P Caprioglio, S Narayanan, R Oliver, et al. 2024. “Alumina Nanoparticle Interfacial Buffer Layer for Low-Bandgap Lead-Tin Perovskite Solar Cells.” University of Oxford.
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Files:: Dataset.zip

(Version of record, zip, 241.3MB, Terms of use)

Publisher copy:: 10.1002/adfm.202303012

Publication website:: https://onlinelibrary.wiley.com/doi/full/10.1002/adfm.202303012

Authors/Creators

+ Jin, H More by this author/creator

Institution:: University of Oxford
Division:: MPLS
Department:: Physics
Role:: Creator

+ Farrar, M More by this author/creator

Institution:: University of Oxford
Division:: MPLS
Department:: Physics
Role:: Creator

+ Ball, J More by this author/creator

Institution:: University of Oxford
Division:: MPLS
Department:: Physics
Role:: Creator

+ Dasgupta, A More by this author/creator

Institution:: University of Oxford
Division:: MPLS
Department:: Physics
Role:: Creator

+ Caprioglio, P More by this author/creator

Institution:: University of Oxford
Division:: MPLS
Department:: Physics
Role:: Creator

More authors...

+ Engineering and Physical Sciences Research Council More from this funder

Grant:: EP/S004947/1; EP/V010840/1; EP/T025077/1

Publisher:: University of Oxford
Publication date:: 2024
Digital storage location:: https://onlinelibrary.wiley.com/doi/full/10.1002/adfm.202303012
DOI:: 10.1002/adfm.202303012

Language:: English
Pubs id:: 2014670
Local pid:: pubs:2014670
Deposit date:: 2024-07-12

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Copyright date:: 2024

Licence:: Terms and Conditions of Use for Oxford University Research Archive

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