Kumar Anjan, Kaur Mandeep, Atif M, Kaur Jatinder, Kaur Ramneet, El-Meligy Mohammed A, Singh Parminder, Alhadrawi Merwa
Department of Electronics and Communication Engineering, GLA University Mathura-281406 India.
Department of Chemistry, School of Sciences, Jain (Deemed-to-be) University Bengaluru Karnataka-560069 India.
RSC Adv. 2024 Oct 25;14(46):34027-34036. doi: 10.1039/d4ra05864j. eCollection 2024 Oct 23.
Improving the crystallinity of formamidinium triiodide (FAPbI) perovskite layer is one of the most effective approaches to increase the photovoltaic performance and stability of FAPbI-based solar cells (FSCs). In the current study, FAPbI layers were fabricated through a sequential deposition method. The morphology and crystalline properties of the FAPbI layers were modified by controlling the lead iodide (PbI) precursor by adding pyrrolidinium (Pyr) material into the PbI layer and modulating the FAPbI crystallization. The Pyr contributed to obtain (001)-preferred FAPbI orientation with no yellow photo-inactive phase. Subsequently, it reduced the unreacted PbI phase in the perovskite layer and suppressed the defect density, resulting in extended carrier lifetimes and improved ambient air and illumination stabilities. The Pyr-mediated FSCs recorded a champion efficiency of 21.72%, which is higher than that of control FSCs with a maximum efficiency of 19.08%. The developed Pyr-mediated method offers a practical and effective approach to fabricate stable and efficient FSCs.
提高碘化甲脒（FAPbI）钙钛矿层的结晶度是提高基于FAPbI的太阳能电池（FSCs）光伏性能和稳定性的最有效方法之一。在当前研究中，通过顺序沉积法制备了FAPbI层。通过在PbI层中添加吡咯烷鎓（Pyr）材料并调节FAPbI结晶来控制碘化铅（PbI）前驱体，从而改变FAPbI层的形貌和结晶性能。Pyr有助于获得具有（001）择优取向且无黄色光非活性相的FAPbI。随后，它减少了钙钛矿层中未反应的PbI相并抑制了缺陷密度，从而延长了载流子寿命并提高了在环境空气和光照下的稳定性。Pyr介导的FSCs的最佳效率记录为21.72%，高于对照FSCs的最高效率19.08%。所开发的Pyr介导方法为制造稳定高效的FSCs提供了一种实用有效的方法。
