Efficient monolithic perovskite-Si tandem solar cells enabled by an ultra-thin indium tin oxide interlayer

Zheng, J; Duan, W; Guo, Y; Zhao, ZC; Yi, H; Ma, FJ; Granados Caro, L; Yi, C; Bing, J; Tang, S; Qu, J; Fong, KC; Cui, X; Zhu, Y; Yang, L; Lambertz, A; Arafat Mahmud, M; Chen, H; Liao, C; Wang, G; Jankovec, M; Xu, C; Uddin, A; Cairney, JM; Bremner, S; Huang, S; Ding, K; McKenzie, DR; Ho-Baillie, AWY

Efficient monolithic perovskite-Si tandem solar cells enabled by an ultra-thin indium tin oxide interlayer

Zheng, J Duan, W Guo, Y Zhao, ZC Yi, H Ma, FJ Granados Caro, L Yi, C Bing, J Tang, S Qu, J Fong, KC Cui, X Zhu, Y Yang, L

Lambertz, A Arafat Mahmud, M Chen, H Liao, C Wang, G Jankovec, M Xu, C Uddin, A Cairney, JM Bremner, S Huang, S Ding, K McKenzie, DR Ho-Baillie, AWY

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Publisher:: ROYAL SOC CHEMISTRY
Publication Type:: Journal Article
Citation:: Energy and Environmental Science, 2023, 16, (3), pp. 1223-1233
Issue Date:: 2023-01-26

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Field	Value	Language
dc.contributor.author	Zheng, J
dc.contributor.author	Duan, W
dc.contributor.author	Guo, Y
dc.contributor.author	Zhao, ZC
dc.contributor.author	Yi, H
dc.contributor.author	Ma, FJ
dc.contributor.author	Granados Caro, L
dc.contributor.author	Yi, C
dc.contributor.author	Bing, J
dc.contributor.author	Tang, S
dc.contributor.author	Qu, J
dc.contributor.author	Fong, KC
dc.contributor.author	Cui, X
dc.contributor.author	Zhu, Y
dc.contributor.author	Yang, L https://orcid.org/0000-0003-0123-1540
dc.contributor.author	Lambertz, A
dc.contributor.author	Arafat Mahmud, M
dc.contributor.author	Chen, H
dc.contributor.author	Liao, C
dc.contributor.author	Wang, G
dc.contributor.author	Jankovec, M
dc.contributor.author	Xu, C
dc.contributor.author	Uddin, A
dc.contributor.author	Cairney, JM
dc.contributor.author	Bremner, S
dc.contributor.author	Huang, S
dc.contributor.author	Ding, K
dc.contributor.author	McKenzie, DR
dc.contributor.author	Ho-Baillie, AWY
dc.date.accessioned	2024-03-20T01:31:33Z
dc.date.available	2024-03-20T01:31:33Z
dc.date.issued	2023-01-26
dc.identifier.citation	Energy and Environmental Science, 2023, 16, (3), pp. 1223-1233
dc.identifier.issn	1754-5692
dc.identifier.issn	1754-5706
dc.identifier.uri	http://hdl.handle.net/10453/176938
dc.description.abstract	Tandem solar cells are promising for overcoming the theoretical single junction solar cell efficiency limit. Here we report an elegant approach to monolithically integrate perovskites and Si-heterojunction tandem solar cells using an ultra-thin indium tin oxide (ITO) interlayer. It is found that a 1.7 nm ITO interlayer is sufficient to provide the interfacing between the silicon and perovskite subcells with minimum parasitic resistance and efficient trap states for carrier recombination. Thinner ITO interlayers result in discontinuous films while thicker ITO interlayers with improved lateral conductivity are less effective in localising shunts especially for large (≥1 cm2) area tandem cells. Furthermore, it is found that a tandem cell with a 26 nm thick 〈p〉a-Si:H junction in the bottom cell performs better than that with a 13 nm thick junction. When combined with a 1.7 nm ultra-thin ITO layer and a front anti-reflection coating, our champion 1.0 cm2 cell achieved 27.2% power conversion efficiency (PCE) and a fill factor (FF) of 82.4% under reverse scan. This FF is the highest of any perovskite-Si tandem cell. The ultra-thin ITO layer is suitable for large area cells. 24.2% efficiency was demonstrated on an 11.8 cm2 cell. A 21.1% efficient 65.1 cm2 (∼4 inch round) cell was also fabricated. This representative cell shows negligible efficiency loss after 600 hours of continuous 1 sun illumination under MPP tracking. This work provides insights into the role of ultra-thin interfacing ITO layers for monolithic large-area perovskite-Si tandem cells.
dc.language	English
dc.publisher	ROYAL SOC CHEMISTRY
dc.relation.ispartof	Energy and Environmental Science
dc.relation.isbasedon	10.1039/d2ee04007g
dc.rights	info:eu-repo/semantics/closedAccess
dc.subject.classification	Energy
dc.title	Efficient monolithic perovskite-Si tandem solar cells enabled by an ultra-thin indium tin oxide interlayer
dc.type	Journal Article
utslib.citation.volume	16
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
pubs.organisational-group	University of Technology Sydney/Strength - CGT - Centre for Green Technology
utslib.copyright.status	closed_access	*
dc.date.updated	2024-03-20T01:31:31Z
pubs.issue	3
pubs.publication-status	Published
pubs.volume	16
utslib.citation.issue	3

Abstract:

Tandem solar cells are promising for overcoming the theoretical single junction solar cell efficiency limit. Here we report an elegant approach to monolithically integrate perovskites and Si-heterojunction tandem solar cells using an ultra-thin indium tin oxide (ITO) interlayer. It is found that a 1.7 nm ITO interlayer is sufficient to provide the interfacing between the silicon and perovskite subcells with minimum parasitic resistance and efficient trap states for carrier recombination. Thinner ITO interlayers result in discontinuous films while thicker ITO interlayers with improved lateral conductivity are less effective in localising shunts especially for large (≥1 cm2) area tandem cells. Furthermore, it is found that a tandem cell with a 26 nm thick 〈p〉a-Si:H junction in the bottom cell performs better than that with a 13 nm thick junction. When combined with a 1.7 nm ultra-thin ITO layer and a front anti-reflection coating, our champion 1.0 cm2 cell achieved 27.2% power conversion efficiency (PCE) and a fill factor (FF) of 82.4% under reverse scan. This FF is the highest of any perovskite-Si tandem cell. The ultra-thin ITO layer is suitable for large area cells. 24.2% efficiency was demonstrated on an 11.8 cm2 cell. A 21.1% efficient 65.1 cm2 (∼4 inch round) cell was also fabricated. This representative cell shows negligible efficiency loss after 600 hours of continuous 1 sun illumination under MPP tracking. This work provides insights into the role of ultra-thin interfacing ITO layers for monolithic large-area perovskite-Si tandem cells.

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http://hdl.handle.net/10453/176938