研究目的
To improve the long-term stability and performance of perovskite solar cells by suppressing internal defects and external humidity sensitivity through the introduction of gadolinium fluoride (GdF3) as a redox shuttle and growth-assist, and the use of aminobutanol vapor for Ostwald ripening in the formation of the perovskite layer.
研究成果
The introduction of GdF3 as a growth-assist and redox shuttle, combined with aminobutanol vapor for Ostwald ripening, significantly improves the quality of perovskite films by reducing grain boundaries and defects. This leads to enhanced photovoltaic performance and stability of the perovskite solar cells, achieving a power conversion efficiency of 21.21% with negligible hysteresis.
研究不足
The study focuses on the improvement of perovskite solar cells through material and process optimization but does not extensively explore the scalability of the proposed method for industrial production or the long-term stability under extreme environmental conditions.
1：Experimental Design and Method Selection:
The study introduces GdF3 into the perovskite precursor solution as a redox shuttle and growth-assist, and uses aminobutanol vapor for Ostwald ripening during the perovskite growth process.
2：Sample Selection and Data Sources:
Perovskite films were prepared with and without GdF3 and aminobutanol treatment for comparison.
3：List of Experimental Equipment and Materials:
Includes spin-coating for film preparation, SEM for morphology observation, XRD for structural analysis, AFM for surface roughness, XPS for chemical state analysis, and J-V measurements for photovoltaic performance.
4：Experimental Procedures and Operational Workflow:
The mixed precursor solution was spin-coated on the TiO2 layer, followed by annealing with aminobutanol vapor. The films were then characterized for morphology, structure, and performance.
5：Data Analysis Methods:
The performance of the PVSCs was evaluated through J-V curves, IPCE spectra, and stability tests under continuous illumination.
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