Structural engineering using rubidium iodide as a dopant under excess lead iodide conditions for high efficiency and stable perovskites

Duong, T; Mulmudi, HK; Shen, H; Wu, YL; Barugkin, C; Mayon, YO; Nguyen, HT; Macdonald, D; Peng, J; Lockrey, M; Li, W; Cheng, YB; White, TP; Weber, K; Catchpole, K

Structural engineering using rubidium iodide as a dopant under excess lead iodide conditions for high efficiency and stable perovskites

Duong, T Mulmudi, HK Shen, H Wu, YL Barugkin, C Mayon, YO Nguyen, HT Macdonald, D Peng, J Lockrey, M

Li, W Cheng, YB White, TP Weber, K Catchpole, K

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Publisher:: ELSEVIER
Publication Type:: Journal Article
Citation:: Nano Energy, 2016, 30, pp. 330-340
Issue Date:: 2016-12-01

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Field	Value	Language
dc.contributor.author	Duong, T
dc.contributor.author	Mulmudi, HK
dc.contributor.author	Shen, H
dc.contributor.author	Wu, YL
dc.contributor.author	Barugkin, C
dc.contributor.author	Mayon, YO
dc.contributor.author	Nguyen, HT
dc.contributor.author	Macdonald, D
dc.contributor.author	Peng, J
dc.contributor.author	Lockrey, M https://orcid.org/0000-0002-0050-2858
dc.contributor.author	Li, W
dc.contributor.author	Cheng, YB
dc.contributor.author	White, TP
dc.contributor.author	Weber, K
dc.contributor.author	Catchpole, K
dc.date.accessioned	2022-08-07T03:52:08Z
dc.date.available	2022-08-07T03:52:08Z
dc.date.issued	2016-12-01
dc.identifier.citation	Nano Energy, 2016, 30, pp. 330-340
dc.identifier.issn	2211-2855
dc.identifier.issn	2211-3282
dc.identifier.uri	http://hdl.handle.net/10453/159720
dc.description.abstract	The highest efficiency perovskite solar cells reported so far are based on mixtures of formamidinium lead triiodide (FAPbI3) and methylammonium lead tribromide (MAPbBr3), where MAPbBr3 acts as a stabilizer to improve the formation of the black perovskite phase. In this work, we dope the perovskite precursor mixture with rubidium iodide (RbI) and study the interplay between the doping substituent and the PbI2 excess on the perovskite phase formation and film morphology. The addition of 5% RbI in combination with excess PbI2 eliminates the formation of yellow non-perovskite phase and enhances the crystallinity of the films. However, the addition of more than 10% RbI results in the formation of a Rb-rich phase, which is detrimental for the cell performance. The findings are confirmed by cathodoluminescence measurements, which also reveal the spatial distribution of different phases on the perovskite films. The performance of RbI-doped perovskite cell is reported for the first time with the highest efficiency of 18.8% and improved thermal/photo stability compared to the undoped cells. The study demonstrates the potential of Rb as an alternative cation for use in high efficiency perovskite cells.
dc.language	English
dc.publisher	ELSEVIER
dc.relation.ispartof	Nano Energy
dc.relation.isbasedon	10.1016/j.nanoen.2016.10.027
dc.rights	info:eu-repo/semantics/closedAccess
dc.subject	0303 Macromolecular and Materials Chemistry, 0912 Materials Engineering, 1007 Nanotechnology
dc.title	Structural engineering using rubidium iodide as a dopant under excess lead iodide conditions for high efficiency and stable perovskites
dc.type	Journal Article
utslib.citation.volume	30
utslib.for	0303 Macromolecular and Materials Chemistry
utslib.for	0912 Materials Engineering
utslib.for	1007 Nanotechnology
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	2022-08-07T03:52:06Z
pubs.publication-status	Published
pubs.volume	30

Abstract:

The highest efficiency perovskite solar cells reported so far are based on mixtures of formamidinium lead triiodide (FAPbI3) and methylammonium lead tribromide (MAPbBr3), where MAPbBr3 acts as a stabilizer to improve the formation of the black perovskite phase. In this work, we dope the perovskite precursor mixture with rubidium iodide (RbI) and study the interplay between the doping substituent and the PbI2 excess on the perovskite phase formation and film morphology. The addition of 5% RbI in combination with excess PbI2 eliminates the formation of yellow non-perovskite phase and enhances the crystallinity of the films. However, the addition of more than 10% RbI results in the formation of a Rb-rich phase, which is detrimental for the cell performance. The findings are confirmed by cathodoluminescence measurements, which also reveal the spatial distribution of different phases on the perovskite films. The performance of RbI-doped perovskite cell is reported for the first time with the highest efficiency of 18.8% and improved thermal/photo stability compared to the undoped cells. The study demonstrates the potential of Rb as an alternative cation for use in high efficiency perovskite cells.

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http://hdl.handle.net/10453/159720