研究目的
To develop a simple method to fabricate a thin 2D ethylenediamine lead iodide (EDAPbI4) layer on the top of 3D formamidinium lead iodide (FAPbI3) layer for efficient and stable 2D-3D-based devices.
研究成果
The study successfully developed a simple deposition method to enhance the stability and PCE of 3D-based devices via forming an EDAPbI4 layer on the top of FAPbI3 film. The 2D-3D-based device showed a PCE of 17.96% and demonstrated remarkably enhanced long-term stability, maintaining the initial PCE value for 200 h and 90% of its initial PCE even after 500 h.
研究不足
The study focuses on the stability and efficiency of 2D-3D perovskite solar cells but does not explore the scalability of the fabrication method or the long-term stability under various environmental conditions beyond 30% RH and 25°C.
1：Experimental Design and Method Selection:
The deposition process of 2D-3D perovskite film is divided into four steps, including spin-coating FAI/PbI2 precursor solution, annealing, spin-coating EDAI2 solution, and annealing again.
2：Sample Selection and Data Sources:
FAPbI3 perovskite film and EDAPbI4 film were prepared and characterized.
3：List of Experimental Equipment and Materials:
Instruments used include X-ray diffraction (XRD), scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), electrochemical impedance spectroscopy (EIS), photoluminescence (PL), and time resolved PL (TRPL).
4：Experimental Procedures and Operational Workflow:
Detailed procedures for film preparation and device fabrication are provided.
5：Data Analysis Methods:
Data from XRD, SEM, XPS, EIS, PL, and TRPL were analyzed to study the film properties and device performance.
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