Interface passivation using choline acetate for efficient and stable planar perovskite solar cells

In order to enhance the efficiency and robustness of perovskite solar cells (PSCs), surface passivation is crucial to minimize surface defects, improve charge transfer, and inhibit the penetration of deteriorating agents. In this study, we demonstrate that choline acetate (ChAc) can effectively pass...

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Main Authors: Thambidurai, Mariyappan, Dewi, Herlina Arianita, Wang, Xizu, Mathews, Nripan, Dang, Cuong, Nguyen, Hung D.
Other Authors: School of Electrical and Electronic Engineering
Format: Article
Language:English
Published: 2023
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Online Access:https://hdl.handle.net/10356/170945
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Institution: Nanyang Technological University
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spelling sg-ntu-dr.10356-1709452023-10-13T15:40:48Z Interface passivation using choline acetate for efficient and stable planar perovskite solar cells Thambidurai, Mariyappan Dewi, Herlina Arianita Wang, Xizu Mathews, Nripan Dang, Cuong Nguyen, Hung D. School of Electrical and Electronic Engineering School of Materials Science and Engineering Institute of Materials Research and Engineering, A*STAR Energy Research Institute @ NTU (ERI@N) Engineering::Electrical and electronic engineering Cell Surfaces Cristallinity In order to enhance the efficiency and robustness of perovskite solar cells (PSCs), surface passivation is crucial to minimize surface defects, improve charge transfer, and inhibit the penetration of deteriorating agents. In this study, we demonstrate that choline acetate (ChAc) can effectively passivate the surfaces of perovskites to improve their stability and photovoltaic performance. The perovskite film passivated with ChAc shows many improvements, such as greater crystallinity, smoother surface topography, preferable alignment of energy levels, and lower defect density. As a result, the champion power conversion efficiency (PCE) for the pristine and ChAc PSCs is 18.20% and 19.80%, respectively. The passivated PSCs also display superior stability, as evidenced by retained unencapsulated PCE of 93% after 600 hours of storage at ambient conditions and 40% relative humidity at 25 °C, compared to 85% retained for pristine PSCs. Our results provide a straightforward and very efficient way to produce high-performing and stable PSCs. Energy Market Authority (EMA) Ministry of Education (MOE) Submitted/Accepted version The research is supported by the AcRF Tier2 grant (MOET2EP50121-0012) and AcRF Tier1 grant RG60/22 from the Singapore Ministry of Education, and the EMA-EP004-EKJGC-0003 grant from the Energy Market Authority (EMA) Singapore. 2023-10-09T05:29:42Z 2023-10-09T05:29:42Z 2023 Journal Article Thambidurai, M., Dewi, H. A., Wang, X., Mathews, N., Dang, C. & Nguyen, H. D. (2023). Interface passivation using choline acetate for efficient and stable planar perovskite solar cells. Sustainable Energy & Fuels, 7(17), 4172-4178. https://dx.doi.org/10.1039/d3se00659j 2398-4902 https://hdl.handle.net/10356/170945 10.1039/d3se00659j 2-s2.0-85166772509 17 7 4172 4178 en MOET2EP50121-0012 RG60/22 EMA-EP004-EKJGC-0003 Sustainable Energy & Fuels © 2023 The Royal Society of Chemistry. All rights reserved. This article may be downloaded for personal use only. Any other use requires prior permission of the copyright holder. The Version of Record is available online at http://doi.org/10.1039/D3SE00659J. application/pdf
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic Engineering::Electrical and electronic engineering
Cell Surfaces
Cristallinity
spellingShingle Engineering::Electrical and electronic engineering
Cell Surfaces
Cristallinity
Thambidurai, Mariyappan
Dewi, Herlina Arianita
Wang, Xizu
Mathews, Nripan
Dang, Cuong
Nguyen, Hung D.
Interface passivation using choline acetate for efficient and stable planar perovskite solar cells
description In order to enhance the efficiency and robustness of perovskite solar cells (PSCs), surface passivation is crucial to minimize surface defects, improve charge transfer, and inhibit the penetration of deteriorating agents. In this study, we demonstrate that choline acetate (ChAc) can effectively passivate the surfaces of perovskites to improve their stability and photovoltaic performance. The perovskite film passivated with ChAc shows many improvements, such as greater crystallinity, smoother surface topography, preferable alignment of energy levels, and lower defect density. As a result, the champion power conversion efficiency (PCE) for the pristine and ChAc PSCs is 18.20% and 19.80%, respectively. The passivated PSCs also display superior stability, as evidenced by retained unencapsulated PCE of 93% after 600 hours of storage at ambient conditions and 40% relative humidity at 25 °C, compared to 85% retained for pristine PSCs. Our results provide a straightforward and very efficient way to produce high-performing and stable PSCs.
author2 School of Electrical and Electronic Engineering
author_facet School of Electrical and Electronic Engineering
Thambidurai, Mariyappan
Dewi, Herlina Arianita
Wang, Xizu
Mathews, Nripan
Dang, Cuong
Nguyen, Hung D.
format Article
author Thambidurai, Mariyappan
Dewi, Herlina Arianita
Wang, Xizu
Mathews, Nripan
Dang, Cuong
Nguyen, Hung D.
author_sort Thambidurai, Mariyappan
title Interface passivation using choline acetate for efficient and stable planar perovskite solar cells
title_short Interface passivation using choline acetate for efficient and stable planar perovskite solar cells
title_full Interface passivation using choline acetate for efficient and stable planar perovskite solar cells
title_fullStr Interface passivation using choline acetate for efficient and stable planar perovskite solar cells
title_full_unstemmed Interface passivation using choline acetate for efficient and stable planar perovskite solar cells
title_sort interface passivation using choline acetate for efficient and stable planar perovskite solar cells
publishDate 2023
url https://hdl.handle.net/10356/170945
_version_ 1781793779551830016