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Updated: Oct 29, 2025
Influence of Hybrid Perovskite Fabrication Methods on Film Formation, Electronic Structure, and Solar Cell Performance
Published on: February 27, 2017
Formamidine Acetate Induces Regulation of Crystallization and Stabilization in Sn-Based Perovskite Solar Cells
Ruoyao Xu1, Hua Dong1,2, Peizhou Li1
1Key Laboratory for Physical Electronics and Devices of the Ministry of Education & Shaanxi Key Lab of Information Photonic Technique, School of Electronic and Information Engineering, Xi'an Jiaotong University, No. 28, Xianning West Road, Xi'an 710049, China.
Abstract:
Sn-based perovskite solar cells (PSCs) have received extensive attention for photovoltaic applications. Nevertheless, the low crystallization quality of the film due to rapid crystallization results in high trap density of states, which is one of the main reasons for poor performance of Sn-based PSC devices. In this work, we developed a strategy for the formation of FASnI3 perovskites by introducing the addition of formamidine acetate (FAAc). Benefiting from the iodide-coordinated cation (FA+) and crystallization-regulated anion (AC-), FAAc could achieve the high-quality films with suppressed defects. The champion power conversion efficiency (PCE) of FAAc-modified PSC devices reached 9.96%, reserving 82% of their initial PCE of the light aging test over 1500 h. We hope that our finding could provide implications on the high-performance and stable Sn-based PSCs.
