Ferromagnetic Nickel as a Sustainable Reducing Agent for Tin–Lead Mixed Perovskite in Single‐Junction and Tandem Solar Cells
Abstract Narrow‐bandgap (NBG) Sn–Pb mixed perovskite solar cells (PSCs) represent a promising solution for surpassing the radiative efficiency of single‐junction solar cells. The unique bandgap tunability of halide perovskites enables optimal tandem configurations of wide‐bandgap (WBG) and NBG subce...
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Wiley
2025-02-01
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| Series: | Advanced Science |
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| Online Access: | https://doi.org/10.1002/advs.202411403 |
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| author | Doyun Im Passarut Boonmongkolras Yeonghun Yun Sung Woong Yang Sunwoo Kim Jungchul Yun Rajendra Kumar Gunasekaran You‐Hyun Seo Nam Joong Jeon Gill Sang Han Sangwook Lee |
| author_facet | Doyun Im Passarut Boonmongkolras Yeonghun Yun Sung Woong Yang Sunwoo Kim Jungchul Yun Rajendra Kumar Gunasekaran You‐Hyun Seo Nam Joong Jeon Gill Sang Han Sangwook Lee |
| author_sort | Doyun Im |
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| description | Abstract Narrow‐bandgap (NBG) Sn–Pb mixed perovskite solar cells (PSCs) represent a promising solution for surpassing the radiative efficiency of single‐junction solar cells. The unique bandgap tunability of halide perovskites enables optimal tandem configurations of wide‐bandgap (WBG) and NBG subcells. However, these devices are limited by the susceptibility of Sn2+ in the NBG bottom cell to being oxidized to Sn4+, creating detrimental Sn vacancies. Herein, a novel approach that replaces Sn particles with Ni particles is introduced as the reducing agent for Sn–Pb mixed perovskite precursor solutions. The ferromagnetic properties of Ni enable simple magnetic filtration, eliminating the filtration issues associated with Sn particles. Ni particles can be reused up to five times without significantly affecting the PSC's performance. Additionally, Ni effectively mitigates the oxidation of Sn2+ due to its low reduction potential (−0.23 V), thereby enhancing device performance. Single‐junction Sn–Pb mixed PSCs prepared using Ni achieve a power‐conversion efficiency (PCE) of 22.29%, retaining over 90% of their initial efficiency after 1250 h. Furthermore, Ni‐based all‐perovskite tandem solar cells combining 1.77 eV WBG top cells with 1.25 eV NBG bottom cells achieve a remarkable PCE of 28.13%. Thus, the proposed strategy can facilitate the commercialization of all‐perovskite tandem devices. |
| format | Article |
| id | doaj-art-461156ee4def430ca4e38d9d3845d7e5 |
| institution | Kabale University |
| issn | 2198-3844 |
| language | English |
| publishDate | 2025-02-01 |
| publisher | Wiley |
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| series | Advanced Science |
| spelling | doaj-art-461156ee4def430ca4e38d9d3845d7e52025-02-04T13:14:54ZengWileyAdvanced Science2198-38442025-02-01125n/an/a10.1002/advs.202411403Ferromagnetic Nickel as a Sustainable Reducing Agent for Tin–Lead Mixed Perovskite in Single‐Junction and Tandem Solar CellsDoyun Im0Passarut Boonmongkolras1Yeonghun Yun2Sung Woong Yang3Sunwoo Kim4Jungchul Yun5Rajendra Kumar Gunasekaran6You‐Hyun Seo7Nam Joong Jeon8Gill Sang Han9Sangwook Lee10School of Materials Science and Engineering Kyungpook National University Daegu 41566 Republic of KoreaAdvanced Energy Materials Research Center Korea Research Institute of Chemical Technology (KRICT) Daejeon 34114 Republic of KoreaDepartment Perovskite Tandem Solar Cells Helmholtz‐Zentrum Berlin für Materialien und Energie GmbH 12489 Berlin GermanySchool of Materials Science and Engineering Kyungpook National University Daegu 41566 Republic of KoreaSchool of Materials Science and Engineering Kyungpook National University Daegu 41566 Republic of KoreaSchool of Materials Science and Engineering Kyungpook National University Daegu 41566 Republic of KoreaSchool of Materials Science and Engineering Kyungpook National University Daegu 41566 Republic of KoreaAdvanced Energy Materials Research Center Korea Research Institute of Chemical Technology (KRICT) Daejeon 34114 Republic of KoreaAdvanced Energy Materials Research Center Korea Research Institute of Chemical Technology (KRICT) Daejeon 34114 Republic of KoreaAdvanced Energy Materials Research Center Korea Research Institute of Chemical Technology (KRICT) Daejeon 34114 Republic of KoreaSchool of Materials Science and Engineering Kyungpook National University Daegu 41566 Republic of KoreaAbstract Narrow‐bandgap (NBG) Sn–Pb mixed perovskite solar cells (PSCs) represent a promising solution for surpassing the radiative efficiency of single‐junction solar cells. The unique bandgap tunability of halide perovskites enables optimal tandem configurations of wide‐bandgap (WBG) and NBG subcells. However, these devices are limited by the susceptibility of Sn2+ in the NBG bottom cell to being oxidized to Sn4+, creating detrimental Sn vacancies. Herein, a novel approach that replaces Sn particles with Ni particles is introduced as the reducing agent for Sn–Pb mixed perovskite precursor solutions. The ferromagnetic properties of Ni enable simple magnetic filtration, eliminating the filtration issues associated with Sn particles. Ni particles can be reused up to five times without significantly affecting the PSC's performance. Additionally, Ni effectively mitigates the oxidation of Sn2+ due to its low reduction potential (−0.23 V), thereby enhancing device performance. Single‐junction Sn–Pb mixed PSCs prepared using Ni achieve a power‐conversion efficiency (PCE) of 22.29%, retaining over 90% of their initial efficiency after 1250 h. Furthermore, Ni‐based all‐perovskite tandem solar cells combining 1.77 eV WBG top cells with 1.25 eV NBG bottom cells achieve a remarkable PCE of 28.13%. Thus, the proposed strategy can facilitate the commercialization of all‐perovskite tandem devices.https://doi.org/10.1002/advs.202411403all‐perovskite tandem solar cellsrecyclable reducing agentsSn–Pb mixed perovskitesstandard reduction potentials |
| spellingShingle | Doyun Im Passarut Boonmongkolras Yeonghun Yun Sung Woong Yang Sunwoo Kim Jungchul Yun Rajendra Kumar Gunasekaran You‐Hyun Seo Nam Joong Jeon Gill Sang Han Sangwook Lee Ferromagnetic Nickel as a Sustainable Reducing Agent for Tin–Lead Mixed Perovskite in Single‐Junction and Tandem Solar Cells Advanced Science all‐perovskite tandem solar cells recyclable reducing agents Sn–Pb mixed perovskites standard reduction potentials |
| title | Ferromagnetic Nickel as a Sustainable Reducing Agent for Tin–Lead Mixed Perovskite in Single‐Junction and Tandem Solar Cells |
| title_full | Ferromagnetic Nickel as a Sustainable Reducing Agent for Tin–Lead Mixed Perovskite in Single‐Junction and Tandem Solar Cells |
| title_fullStr | Ferromagnetic Nickel as a Sustainable Reducing Agent for Tin–Lead Mixed Perovskite in Single‐Junction and Tandem Solar Cells |
| title_full_unstemmed | Ferromagnetic Nickel as a Sustainable Reducing Agent for Tin–Lead Mixed Perovskite in Single‐Junction and Tandem Solar Cells |
| title_short | Ferromagnetic Nickel as a Sustainable Reducing Agent for Tin–Lead Mixed Perovskite in Single‐Junction and Tandem Solar Cells |
| title_sort | ferromagnetic nickel as a sustainable reducing agent for tin lead mixed perovskite in single junction and tandem solar cells |
| topic | all‐perovskite tandem solar cells recyclable reducing agents Sn–Pb mixed perovskites standard reduction potentials |
| url | https://doi.org/10.1002/advs.202411403 |
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