Scalable post-treatment for improved self-assembled monolayer coverage in perovskite solar cells

被引：0
|
作者：
Qiu, Wei-Jia [1 ]
Li, Yun-Shan [1 ]
Lin, Chieh-Ting [1 ,2 ]
机构：
[1] Department of Chemical Engineering, National Chung Hsing University, 145 Xingda Road, Taichung,402-27, Taiwan
[2] Innovation and Development Center of Sustainable Agriculture, National Chung Hsing University, 145 Xingda Road, Taichung,40227, Taiwan
来源：
Sustainable Energy and Fuels | 2024年 / 8卷 / 23期
关键词：
Perovskite solar cells (PSCs) are rapidly emerging as a next-generation photovoltaic technology due to their tunable band gap; low-temperature processing; and high power conversion efficiency (PCE). Achieving uniform and effective coverage of self-assembled monolayers (SAMs) on transparent conducting oxides (TCOs) is critical for optimizing PSC performance; as non-uniform SAM coverage can lead to surface recombination; higher leakage currents; and reduced efficiency. In this study; we introduce a low-cost; air-processible method—Cooled Moisture Condensation (CMC)—to enhance the coverage of MeO-2PACz SAMs on fluorine-doped tin oxide (FTO) substrates. By cooling the FTO in ambient air; moisture condenses uniformly; increasing surface hydroxyl (-OH) groups and reducing oxygen vacancies; which improves SAM bonding and coverage. Conductive Atomic Force Microscopy (C-AFM) and Scanning Electron Microscopy (SEM) confirm enhanced SAM coverage; reduced leakage current; and improved perovskite film quality. Capacitance-voltage (C-V) measurements reveal a higher built-in potential (Vbi); while open-circuit voltage decay (OCVD) and transient photocurrent decay (TPC) analyses demonstrate more efficient charge extraction and reduced recombination in CMC-treated devices. As a result; PSCs fabricated with CMC-treated substrates exhibit superior performance and reproducibility; highlighting the potential of this method for scalable; high-efficiency solar cell production. © 2024 The Royal Society of Chemistry;
D O I：
10.1039/d4se01365d
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页码：5399 / 5406
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