研究目的
To improve the phase stability and power conversion efficiency of CsPbI3 perovskite solar cells through Mn2+ doping.
研究成果
Mn2+ doping in CsPbI3 films improves the crystalline quality, reduces defect density, and enhances the phase stability and power conversion efficiency of perovskite solar cells. The optimized Mn2+ doping concentration of 2% resulted in a PCE of 16.52%, with improved humidity and thermal stability.
研究不足
The study focuses on Mn2+ doping in CsPbI3 films and its effects on phase stability and solar cell performance. The long-term stability under operational conditions and the scalability of the doping technique for large-area solar cells are not addressed.
1：Experimental Design and Method Selection:
The study involves substituting Pb2+ in CsPbI3 film with Mn2+ to modulate the perovskite lattice structure and improve phase stability.
2：Sample Selection and Data Sources:
CsPbI3 films with varying concentrations of Mn2+ doping were prepared and characterized.
3：List of Experimental Equipment and Materials:
Materials include PbI2, CsI, MnI2, DMSO, DMF, PTAA, Li-TFSI, tBP, and gold for electrodes. Equipment includes X-ray diffraction meter, UV-vis-NIR spectrophotometer, SEM, AFM, XPS, and solar simulator.
4：Experimental Procedures and Operational Workflow:
The perovskite films were spin-coated onto FTO glass substrates, followed by thermal annealing. PTAA was then spin-coated onto the perovskite films, and gold electrodes were thermally evaporated.
5：Data Analysis Methods:
XRD, UV-vis-NIR, PL, TR-PL, SEM, AFM, XPS, and J-V measurements were used to analyze the films and devices.
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