Light and Electrically Induced Phase Segregation and Its Impact on the Stability of Quadruple Cation High Bandgap Perovskite Solar Cells.

Duong, T; Mulmudi, HK; Wu, Y; Fu, X; Shen, H; Peng, J; Wu, N; Nguyen, HT; Macdonald, D; Lockrey, M; White, TP; Weber, K; Catchpole, K

Light and Electrically Induced Phase Segregation and Its Impact on the Stability of Quadruple Cation High Bandgap Perovskite Solar Cells.

Duong, T Mulmudi, HK Wu, Y Fu, X Shen, H Peng, J Wu, N Nguyen, HT Macdonald, D Lockrey, M

White, TP Weber, K Catchpole, K

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Publisher:: AMER CHEMICAL SOC
Publication Type:: Journal Article
Citation:: ACS Appl Mater Interfaces, 2017, 9, (32), pp. 26859-26866
Issue Date:: 2017-08-16

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Field	Value	Language
dc.contributor.author	Duong, T
dc.contributor.author	Mulmudi, HK
dc.contributor.author	Wu, Y
dc.contributor.author	Fu, X
dc.contributor.author	Shen, H
dc.contributor.author	Peng, J
dc.contributor.author	Wu, N
dc.contributor.author	Nguyen, HT
dc.contributor.author	Macdonald, D
dc.contributor.author	Lockrey, M https://orcid.org/0000-0002-0050-2858
dc.contributor.author	White, TP
dc.contributor.author	Weber, K
dc.contributor.author	Catchpole, K
dc.date.accessioned	2022-09-21T20:10:19Z
dc.date.available	2022-09-21T20:10:19Z
dc.date.issued	2017-08-16
dc.identifier.citation	ACS Appl Mater Interfaces, 2017, 9, (32), pp. 26859-26866
dc.identifier.issn	1944-8244
dc.identifier.issn	1944-8252
dc.identifier.uri	http://hdl.handle.net/10453/161959
dc.description.abstract	Perovskite material with a bandgap of 1.7-1.8 eV is highly desirable for the top cell in a tandem configuration with a lower bandgap bottom cell, such as a silicon cell. This can be achieved by alloying iodide and bromide anions, but light-induced phase-segregation phenomena are often observed in perovskite films of this kind, with implications for solar cell efficiency. Here, we investigate light-induced phase segregation inside quadruple-cation perovskite material in a complete cell structure and find that the magnitude of this phenomenon is dependent on the operating condition of the solar cell. Under short-circuit and even maximum power point conditions, phase segregation is found to be negligible compared to the magnitude of segregation under open-circuit conditions. In accordance with the finding, perovskite cells based on quadruple-cation perovskite with 1.73 eV bandgap retain 94% of the original efficiency after 12 h operation at the maximum power point, while the cell only retains 82% of the original efficiency after 12 h operation at the open-circuit condition. This result highlights the need to have standard methods including light/dark and bias condition for testing the stability of perovskite solar cells. Additionally, phase segregation is observed when the cell was forward biased at 1.2 V in the dark, which indicates that photoexcitation is not required to induce phase segregation.
dc.format	Print-Electronic
dc.language	eng
dc.publisher	AMER CHEMICAL SOC
dc.relation.ispartof	ACS Appl Mater Interfaces
dc.relation.isbasedon	10.1021/acsami.7b06816
dc.rights	info:eu-repo/semantics/closedAccess
dc.subject	03 Chemical Sciences, 09 Engineering
dc.subject.classification	Nanoscience & Nanotechnology
dc.title	Light and Electrically Induced Phase Segregation and Its Impact on the Stability of Quadruple Cation High Bandgap Perovskite Solar Cells.
dc.type	Journal Article
utslib.citation.volume	9
utslib.location.activity	United States
utslib.for	03 Chemical Sciences
utslib.for	09 Engineering
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Science
utslib.copyright.status	closed_access	*
dc.date.updated	2022-09-21T20:10:15Z
pubs.issue	32
pubs.publication-status	Published
pubs.volume	9
utslib.citation.issue	32

Abstract:

Perovskite material with a bandgap of 1.7-1.8 eV is highly desirable for the top cell in a tandem configuration with a lower bandgap bottom cell, such as a silicon cell. This can be achieved by alloying iodide and bromide anions, but light-induced phase-segregation phenomena are often observed in perovskite films of this kind, with implications for solar cell efficiency. Here, we investigate light-induced phase segregation inside quadruple-cation perovskite material in a complete cell structure and find that the magnitude of this phenomenon is dependent on the operating condition of the solar cell. Under short-circuit and even maximum power point conditions, phase segregation is found to be negligible compared to the magnitude of segregation under open-circuit conditions. In accordance with the finding, perovskite cells based on quadruple-cation perovskite with 1.73 eV bandgap retain 94% of the original efficiency after 12 h operation at the maximum power point, while the cell only retains 82% of the original efficiency after 12 h operation at the open-circuit condition. This result highlights the need to have standard methods including light/dark and bias condition for testing the stability of perovskite solar cells. Additionally, phase segregation is observed when the cell was forward biased at 1.2 V in the dark, which indicates that photoexcitation is not required to induce phase segregation.

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http://hdl.handle.net/10453/161959