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Keywords = PEACl additive

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15 pages, 8761 KB  
Article
Solvent-Engineered PEACl Passivation: A Pathway to 24.27% Efficiency and Industrially Scalable Perovskite Solar Cells
by Min Xin, Ihtesham Ghani, Yu Zhang, Huaxi Gao, Danish Khan, Xin Yang and Zeguo Tang
Nanomaterials 2025, 15(9), 699; https://doi.org/10.3390/nano15090699 - 6 May 2025
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Abstract
Addressing the critical challenges of interfacial defects and insufficient stability in perovskite solar cells, this work introduces a co-solvent engineering strategy to dynamically regulate the phenethylammonium chloride (PEACl) passivation layer. The effect of isopropyl alcohol (IPA) and a DMSO: IPA (1:100) mixture as [...] Read more.
Addressing the critical challenges of interfacial defects and insufficient stability in perovskite solar cells, this work introduces a co-solvent engineering strategy to dynamically regulate the phenethylammonium chloride (PEACl) passivation layer. The effect of isopropyl alcohol (IPA) and a DMSO: IPA (1:100) mixture as solvent for forming the PEACl 2D passivation layer is systematically explored, and the synergistic interplay between solvent coordination strength and crystallization kinetics is systematically investigated. The DMSO: IPA (1:100) blend balances Pb-O coordination (via DMSO) and rapid phase separation (via IPA), enabling the oriented growth of a dense, ultrathin 2D perovskite overlayer. This suppresses defect density (electron traps reduced to 1.68 × 1015 cm−3) and extends carrier lifetime, yielding a champion power conversion efficiency (PCE) of 24.27%—a significant improvement over the control (22.73%). For the first time, we establish a dual-parameter “solvent coordination-crystallization kinetics” model, providing a universal framework for designing environmentally benign solvent systems and advancing the industrial scalability of high-performance perovskite solar cells (PSCs). Full article
(This article belongs to the Special Issue Advanced Nanoscale Materials and (Flexible) Devices)
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