Enhanced Stability of Perovskite Solar Cells through MACl-Induced Crystallinity Improvement and Suppression of Ion Migration | ||
| Journal of Ultrafine Grained and Nanostructured Materials | ||
| مقاله 7، دوره 58، شماره 2، اسفند 2025، صفحه 219-227 اصل مقاله (1.11 M) | ||
| نوع مقاله: Research Paper | ||
| شناسه دیجیتال (DOI): 10.22059/jufgnsm.2025.02.07 | ||
| نویسندگان | ||
| Zhila Khakpour1؛ Omran Moradlou* 1؛ Hanieh Sharifian2؛ Maryam Heidariramsheh3؛ Nima Taghavinia4 | ||
| 1Department of Analytical Chemistry, Faculty of Chemistry, Alzahra University, Tehran, Iran | ||
| 2Nanoparticles and Coatings Lab, Department of Physics, Sharif University of Technology, Tehran, Iran | ||
| 3School of Metallurgy and Materials Engineering, College of Engineering, University of Tehran, Tehran, Iran | ||
| 4Center for Nanoscience and Nanotechnology, Sharif University of Technology, Tehran, Iran | ||
| چکیده | ||
| Addressing challenges related to the structural defects, ion migration, and instability in perovskite solar cells, this study investigates the impact of incorporating methylammonium chloride (MACl) into the perovskite precursor solution. The optimal addition of MACl (10 mg/mL) resulted in perovskite films with grain growth improvement and fewer grain boundaries, as observed by field emission scanning electron microscopy. Furthermore, X-ray diffraction analysis showed an increased preferential orientation along the (001) and (002) crystal planes, while UV-Vis and photoluminescence spectroscopy data indicated smooth surface and reduced defects induced recombination. Consequently, the fabricated PSCs with the optimized composition achieved a power conversion efficiency of 14.56%, representing a significant improvement over the control device (12.81%) and the sample with excess MACl (20 mg/mL, 13.43%). This enhanced performance was attributed to improvements in all photovoltaic parameters, along with a notable reduction in the hysteresis index, indicating suppressed ion migration. Electrochemical impedance spectroscopy analysis further supported these improvements by revealing reduced charge transfer resistance and enhanced recombination resistance. Importantly, the optimized devices demonstrated enhanced power output, retaining 85% of their initial performance after 120 s light soaking. These results indicate that optimized MACl incorporation is an effective strategy for simultaneously improving the efficiency and stability of PSCs by enhancing crystallinity, suppressing ion migration, and promoting defect passivation. | ||
| کلیدواژهها | ||
| Perovskite solar cell؛ methylammonium chloride؛ hysteresis؛ ion migration؛ crystallinity | ||
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آمار تعداد مشاهده مقاله: 579 تعداد دریافت فایل اصل مقاله: 473 |
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