研究目的
Investigating the effect of lead thiocyanate (Pb(SCN)2) as an additive on the performance of tin-based perovskite solar cells (PSCs) to reduce the lead content while maintaining high efficiency.
研究成果
The addition of an appropriate amount of Pb(SCN)2 to Sn-based PSCs significantly improves their efficiency and stability, with a notable reduction in lead content. This approach presents a viable pathway toward developing more eco-friendly perovskite solar cells without compromising performance.
研究不足
The study focuses on the effect of Pb(SCN)2 as an additive in Sn-based PSCs, but the long-term stability and scalability of these devices under real-world conditions were not extensively explored. Additionally, the environmental impact of the remaining lead content, albeit reduced, was not quantified.
1：Experimental Design and Method Selection:
The study involved synthesizing 11 different perovskite precursors by varying the concentration of Pb(SCN)2 from 0 to 0.5 M in CH(NH2)2SnI3. PSCs were then fabricated using these precursors, and their characteristics were compared.
2：5 M in CH(NH2)2SnIPSCs were then fabricated using these precursors, and their characteristics were compared.
Sample Selection and Data Sources:
2. Sample Selection and Data Sources: The substrates used were ITO-coated glass, cleaned and treated with UV–ozone. A hole-transport layer of PEDOT:PSS was spin-coated onto the substrate.
3：List of Experimental Equipment and Materials:
Materials included Poly(3,4-ethylenedioxythiophene) polystyrene sulfonate (PEDOT:PSS), Phenyl-C??-butyric acid methyl ester (PCBM), Bathocuproine (BCP), and LiF. Equipment included a thermal evaporator, FE-SEM, XRD, UV–vis spectroscopy, AFM, TEM, and XPS.
4：Experimental Procedures and Operational Workflow:
The perovskite precursor solutions were spin-coated onto the PEDOT:PSS layer, followed by annealing. PCBM, BCP, LiF, and Al layers were sequentially deposited to complete the solar cell fabrication.
5：Data Analysis Methods:
The performance of the PSCs was analyzed using current density–voltage (J–V) characteristics under AM 1.5G illumination. The morphology and crystallinity of the perovskite films were examined using FE-SEM and XRD, respectively.
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