Bulk passivation of perovskite films utilizing halide anion ionic liquids
Chemical additives to perovskite precursors constitute a predominant route to passivate defects in perovskite films and improve carrier charge dynamics. In this work, ionic liquids (ILs) with chloride and iodide anions are used as additives for bulk passivation of perovskite films. The ionic liquids...
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| Format: | Article |
| Language: | English |
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Elsevier
2023-11-01
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| Series: | International Journal of Thermofluids |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2666202723001210 |
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| author | Adnan Alashkar Mohamad Ayoub Taleb Ibrahim Mustafa Khamis Paul Nancarrow Abdul Hai Alami Nouar Tabet |
| author_facet | Adnan Alashkar Mohamad Ayoub Taleb Ibrahim Mustafa Khamis Paul Nancarrow Abdul Hai Alami Nouar Tabet |
| author_sort | Adnan Alashkar |
| collection | DOAJ |
| description | Chemical additives to perovskite precursors constitute a predominant route to passivate defects in perovskite films and improve carrier charge dynamics. In this work, ionic liquids (ILs) with chloride and iodide anions are used as additives for bulk passivation of perovskite films. The ionic liquids in the form of 1‑butyl‑4-methylpyradinium iodide (IL-I) and 1-ethylimidazolium chloride (IL-Cl) are mixed individually with a precursor of Cesium Formamidinium Lead Triiodide and Methylammonium Chloride (CsFAPbI3−MACl). The decay of charge carriers within the perovskite film before and after passivation with ILs was measured by Time Resolved Photoluminescence Spectroscopy (TRPL). The effect of added ILs on the recombination rate of the photocarriers was investigated by analyzing the decay of the TRPL signal in all samples. The average lifetimes obtained within one day of preparations were 79 ns, 73 ns and 275 ns for pristine perovskite, IL-I passivated perovskite and IL-Cl passivated perovskite films, respectively. These values show that the presence of the IL with chloride anion greatly improves the average lifetime of the charge carrier by around 250%, while IL with iodide anion decreased the lifetime by 32% as compared with the pristine perovskite sample. This finding renders the IL-Cl passivated perovskite films as a valuable resource in applications ranging from photoelectric to hydrogen generation devices. |
| first_indexed | 2024-03-09T02:13:26Z |
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| id | doaj.art-3114bc4bfb1845bdb2060061066977d4 |
| institution | Directory Open Access Journal |
| issn | 2666-2027 |
| language | English |
| last_indexed | 2024-03-09T02:13:26Z |
| publishDate | 2023-11-01 |
| publisher | Elsevier |
| record_format | Article |
| series | International Journal of Thermofluids |
| spelling | doaj.art-3114bc4bfb1845bdb2060061066977d42023-12-07T05:30:38ZengElsevierInternational Journal of Thermofluids2666-20272023-11-0120100404Bulk passivation of perovskite films utilizing halide anion ionic liquidsAdnan Alashkar0Mohamad Ayoub1Taleb Ibrahim2Mustafa Khamis3Paul Nancarrow4Abdul Hai Alami5Nouar Tabet6PhD Program in Materials Science and Engineering, American University of Sharjah, Sharjah, 26666, United Arab Emirates; Corresponding author.Sustainable and Renewable Energy Engineering Department, University of Sharjah, Sharjah, 27272, United Arab Emirates; Sustainable Energy & Power Systems Research Centre, RISE, University of Sharjah, Sharjah, 27272, United Arab EmiratesDepartment of Chemical Engineering, American University of Sharjah, Sharjah, 26666, United Arab EmiratesDepartment of Biology, Chemistry and Environmental Sciences, College of Arts and Sciences, American University of Sharjah, Sharjah, 26666, United Arab EmiratesDepartment of Chemical Engineering, American University of Sharjah, Sharjah, 26666, United Arab EmiratesSustainable and Renewable Energy Engineering Department, University of Sharjah, Sharjah, 27272, United Arab Emirates; Sustainable Energy & Power Systems Research Centre, RISE, University of Sharjah, Sharjah, 27272, United Arab Emirates; Center for Advanced Materials Research, Research Institute of Science and Engineering, University of Sharjah, Sharjah, 27272, United Arab EmiratesCenter for Advanced Materials Research, Research Institute of Science and Engineering, University of Sharjah, Sharjah, 27272, United Arab Emirates; Department of Applied Physics and Astronomy, University of Sharjah, Sharjah, 27272, United Arab EmiratesChemical additives to perovskite precursors constitute a predominant route to passivate defects in perovskite films and improve carrier charge dynamics. In this work, ionic liquids (ILs) with chloride and iodide anions are used as additives for bulk passivation of perovskite films. The ionic liquids in the form of 1‑butyl‑4-methylpyradinium iodide (IL-I) and 1-ethylimidazolium chloride (IL-Cl) are mixed individually with a precursor of Cesium Formamidinium Lead Triiodide and Methylammonium Chloride (CsFAPbI3−MACl). The decay of charge carriers within the perovskite film before and after passivation with ILs was measured by Time Resolved Photoluminescence Spectroscopy (TRPL). The effect of added ILs on the recombination rate of the photocarriers was investigated by analyzing the decay of the TRPL signal in all samples. The average lifetimes obtained within one day of preparations were 79 ns, 73 ns and 275 ns for pristine perovskite, IL-I passivated perovskite and IL-Cl passivated perovskite films, respectively. These values show that the presence of the IL with chloride anion greatly improves the average lifetime of the charge carrier by around 250%, while IL with iodide anion decreased the lifetime by 32% as compared with the pristine perovskite sample. This finding renders the IL-Cl passivated perovskite films as a valuable resource in applications ranging from photoelectric to hydrogen generation devices.http://www.sciencedirect.com/science/article/pii/S2666202723001210Perovskite solar cellsPassivationIonic liquidsTime-resolved photoluminescence |
| spellingShingle | Adnan Alashkar Mohamad Ayoub Taleb Ibrahim Mustafa Khamis Paul Nancarrow Abdul Hai Alami Nouar Tabet Bulk passivation of perovskite films utilizing halide anion ionic liquids International Journal of Thermofluids Perovskite solar cells Passivation Ionic liquids Time-resolved photoluminescence |
| title | Bulk passivation of perovskite films utilizing halide anion ionic liquids |
| title_full | Bulk passivation of perovskite films utilizing halide anion ionic liquids |
| title_fullStr | Bulk passivation of perovskite films utilizing halide anion ionic liquids |
| title_full_unstemmed | Bulk passivation of perovskite films utilizing halide anion ionic liquids |
| title_short | Bulk passivation of perovskite films utilizing halide anion ionic liquids |
| title_sort | bulk passivation of perovskite films utilizing halide anion ionic liquids |
| topic | Perovskite solar cells Passivation Ionic liquids Time-resolved photoluminescence |
| url | http://www.sciencedirect.com/science/article/pii/S2666202723001210 |
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