研究目的
To develop stable and high-efficiency methylammonium-free perovskite solar cells by introducing cesium chloride (CsCl) and regulating the amount of bromide (Br?) in the double cation (Cs, formamidinium) perovskite precursor.
研究成果
The introduction of CsCl and PbBr2 in the double cation (Cs, FA) perovskite system significantly enhances the stability and performance of MA-free PSCs, achieving a high PCE of 20.50% and remarkable long-term stability, paving the way for their commercialization.
研究不足
The study focuses on the thermal and long-term stability of MA-free PSCs but does not extensively explore the scalability of the fabrication process or the environmental impact of the materials used.
1：Experimental Design and Method Selection:
The study involved the fabrication of perovskite solar cells using a one-step spin-coating method with CsCl and PbBr2 additives to stabilize the black phase (α-phase) of FAPbI
2：Sample Selection and Data Sources:
Fluorine-doped tin oxide (FTO)-coated glass substrates were used, and perovskite films were prepared with varying amounts of PbBr
3：List of Experimental Equipment and Materials:
Equipment included a scanning electron microscope (SEM, FEI Sirion-200), X-ray diffractometer (Bruker D8 Advance), and fluorescence spectrometer (PerkinElmer LS 55). Materials included CsCl, PbBr2, and FTO substrates.
4：5). Materials included CsCl, PbBr2, and FTO substrates. Experimental Procedures and Operational Workflow:
4. Experimental Procedures and Operational Workflow: Perovskite films were spin-coated on FTO/c-TiO2/meso-TiO2/SnO2 substrates, annealed, and characterized for morphology, crystallinity, and photovoltaic performance.
5：Data Analysis Methods:
Data were analyzed using SEM, XRD, PL, and TRPL measurements to assess film quality and device performance.
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