Toward efficient and stable perovskite photovoltaics with fluorinated phosphonate salt surface passivation
Surface passivation has been proven to be an effective strategy to improve power conversion efficiency and stability of perovskite solar cells. However, the rationale for choosing an appropriate passivator, in terms of the type of interaction with the underlying perovskite layer, is still not clear...
| Main Authors: | , , , , , , , , , |
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| Format: | Journal Article |
| Language: | English |
| Published: |
2022
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| Online Access: | https://hdl.handle.net/10356/159807 |
| _version_ | 1826119805721116672 |
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| author | Han, Guifang Koh, Teck Ming Li, Jia Febriansyah, Benny Fang, Yanan Jamaludin, Nur Fadilah Ng, Yan Fong Rana, Prem Jyoti Singh Mhaisalkar, Subodh Gautam Mathews, Nripan |
| author2 | School of Materials Science and Engineering |
| author_facet | School of Materials Science and Engineering Han, Guifang Koh, Teck Ming Li, Jia Febriansyah, Benny Fang, Yanan Jamaludin, Nur Fadilah Ng, Yan Fong Rana, Prem Jyoti Singh Mhaisalkar, Subodh Gautam Mathews, Nripan |
| author_sort | Han, Guifang |
| collection | NTU |
| description | Surface passivation has been proven to be an effective strategy to improve power conversion efficiency and stability of perovskite solar cells. However, the rationale for choosing an appropriate passivator, in terms of the type of interaction with the underlying perovskite layer, is still not clear yet. Here, we purposively choose two molecules as passivators for perovskites, fluorinated phosphonic acid and its corresponding phosphonate salt, to monitor the extent of interaction between these passivators and the perovskite surface. The effect of passivation on film stability and device performance is also determined. Higher photoluminescence intensity and longer carrier lifetime are observed in perovskite films that treated with phosphonium salt passivation because of the stronger interaction with perovskites. The corresponding device shows enhancement in power conversion efficiency from 18.27 to 19.44%. Furthermore, the water contact angle of passivated perovskite films exceeds 110.9° as compared to the pristine, untreated perovskite (74.5°). This superhydrophobic nature imparted by fluorinated phosphonium salt passivation enables excellent long-term stability of devices, allowing over 90% of their initial efficiency to be retained even after 90 days' storage under ambient conditions with 30% relative humidity. |
| first_indexed | 2024-10-01T05:06:07Z |
| format | Journal Article |
| id | ntu-10356/159807 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T05:06:07Z |
| publishDate | 2022 |
| record_format | dspace |
| spelling | ntu-10356/1598072022-07-04T01:58:34Z Toward efficient and stable perovskite photovoltaics with fluorinated phosphonate salt surface passivation Han, Guifang Koh, Teck Ming Li, Jia Febriansyah, Benny Fang, Yanan Jamaludin, Nur Fadilah Ng, Yan Fong Rana, Prem Jyoti Singh Mhaisalkar, Subodh Gautam Mathews, Nripan School of Materials Science and Engineering Energy Research Institute @ NTU (ERI@N) Engineering::Materials Perovskite Photovoltaic Surface passivation has been proven to be an effective strategy to improve power conversion efficiency and stability of perovskite solar cells. However, the rationale for choosing an appropriate passivator, in terms of the type of interaction with the underlying perovskite layer, is still not clear yet. Here, we purposively choose two molecules as passivators for perovskites, fluorinated phosphonic acid and its corresponding phosphonate salt, to monitor the extent of interaction between these passivators and the perovskite surface. The effect of passivation on film stability and device performance is also determined. Higher photoluminescence intensity and longer carrier lifetime are observed in perovskite films that treated with phosphonium salt passivation because of the stronger interaction with perovskites. The corresponding device shows enhancement in power conversion efficiency from 18.27 to 19.44%. Furthermore, the water contact angle of passivated perovskite films exceeds 110.9° as compared to the pristine, untreated perovskite (74.5°). This superhydrophobic nature imparted by fluorinated phosphonium salt passivation enables excellent long-term stability of devices, allowing over 90% of their initial efficiency to be retained even after 90 days' storage under ambient conditions with 30% relative humidity. Ministry of Education (MOE) Nanyang Technological University National Research Foundation (NRF) The authors acknowledge funding from the National Research Foundation, Prime Minister's Office, Singapore, under its Intra-CREATE Collaborative Grant (NRF2018-ITC001-001), Competitive Research Program (CRP Award No. NRF-CRP14-2014-03), and Singapore-Berkeley Research Initiative for Sustainable Energy (SinBeRISE) CREATE Program, Office of Naval Research Global (ONRG-NICOP-N62909-17-1-2155), Nanyang Technological University start-up grants (M4080514 and M4081293); the Ministry of Education Academic Research Fund Tier 1 grants (RG184/14, RG166/16 and RG101/15), and Tier 2 grants (MOE2016-T2-1-100, MOE2014-T2-1-044, and MOE2015-T2-2-015). G. Han would like to acknowledge the support of the Fundamental Research Funds of Shandong University numbered 2019GN002. 2022-07-04T01:58:34Z 2022-07-04T01:58:34Z 2021 Journal Article Han, G., Koh, T. M., Li, J., Febriansyah, B., Fang, Y., Jamaludin, N. F., Ng, Y. F., Rana, P. J. S., Mhaisalkar, S. G. & Mathews, N. (2021). Toward efficient and stable perovskite photovoltaics with fluorinated phosphonate salt surface passivation. ACS Applied Energy Materials, 4(3), 2716-2723. https://dx.doi.org/10.1021/acsaem.1c00011 2574-0962 https://hdl.handle.net/10356/159807 10.1021/acsaem.1c00011 2-s2.0-85102464623 3 4 2716 2723 en NRF2018-ITC001-001 NRF-CRP14-2014-03 ONRG-NICOP-N62909-17-1-2155 M4080514 M4081293 RG184/14 RG166/16 RG101/15 MOE2016-T2-1-100 MOE2014-T2-1-044 MOE2015-T2-2-015 ACS Applied Energy Materials © 2021 American Chemical Society. All rights reserved. |
| spellingShingle | Engineering::Materials Perovskite Photovoltaic Han, Guifang Koh, Teck Ming Li, Jia Febriansyah, Benny Fang, Yanan Jamaludin, Nur Fadilah Ng, Yan Fong Rana, Prem Jyoti Singh Mhaisalkar, Subodh Gautam Mathews, Nripan Toward efficient and stable perovskite photovoltaics with fluorinated phosphonate salt surface passivation |
| title | Toward efficient and stable perovskite photovoltaics with fluorinated phosphonate salt surface passivation |
| title_full | Toward efficient and stable perovskite photovoltaics with fluorinated phosphonate salt surface passivation |
| title_fullStr | Toward efficient and stable perovskite photovoltaics with fluorinated phosphonate salt surface passivation |
| title_full_unstemmed | Toward efficient and stable perovskite photovoltaics with fluorinated phosphonate salt surface passivation |
| title_short | Toward efficient and stable perovskite photovoltaics with fluorinated phosphonate salt surface passivation |
| title_sort | toward efficient and stable perovskite photovoltaics with fluorinated phosphonate salt surface passivation |
| topic | Engineering::Materials Perovskite Photovoltaic |
| url | https://hdl.handle.net/10356/159807 |
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