研究目的
Investigating the effects of dual-site mixing on the structure and bandgap of trivalent metal halide perovskites for improved solar cell performance.
研究成果
The dual-site mixed FACs2Sb2I6Cl3 perovskite exhibits a 2D layer structure with a narrower bandgap, leading to improved solar cell performance. The study highlights the potential of dual-site mixing in bandgap engineering and phase stabilization of MHPs.
研究不足
The study is limited to trivalent metal halide perovskites and does not explore other types of perovskites. The PCEs of the fabricated solar cells are still relatively low.
1：Experimental Design and Method Selection:
The study involved the synthesis of dual-site mixed FACs2Sb2I6Cl3 MHP and comparison with MA3Sb2I9 and MA3Sb2I6Cl3. Theoretical models and DFT calculations were employed to understand the thermodynamic origins of phase stabilization and bandgap modulation.
2：Theoretical models and DFT calculations were employed to understand the thermodynamic origins of phase stabilization and bandgap modulation.
Sample Selection and Data Sources:
2. Sample Selection and Data Sources: Samples were prepared by mixing FACl, CsCl, and SbI3 in specific molar ratios. UV-visible absorption spectra, XRD patterns, TGA, DSC, and EDS were used for characterization.
3：List of Experimental Equipment and Materials:
FACl, CsCl, SbI3, FTO, bl-TiO2, m-TiO2, PTAA, Au.
4：Experimental Procedures and Operational Workflow:
Synthesis of MHP films, characterization of optical and structural properties, fabrication of solar cells, and performance evaluation.
5：Data Analysis Methods:
UV-visible absorption spectra analysis, XRD pattern simulation, DFT calculations for band structure and solution energy.
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