研究目的
Investigating the thermal stability of mixed cation organic–inorganic lead halide perovskites films and devices in air atmosphere to understand the degradation mechanisms and improve the efficiency of perovskite solar cells.
研究成果
The study demonstrates that thermal treatment affects the stability and performance of perovskite solar cells, with MA-perovskite decomposing into PbI2 at elevated temperatures. However, optimal heat treatment can passivate defects and improve efficiency. This work provides valuable insights into the thermal stability of perovskite materials and devices, suggesting pathways for enhancing their commercial viability.
研究不足
The study focuses on the thermal stability of perovskite solar cells in air atmosphere, but other environmental factors like moisture and oxygen were not extensively studied. The research also highlights the need for further optimization of heat treatment conditions to enhance device performance.
1：Experimental Design and Method Selection:
The study involved the fabrication of perovskite solar cells with a specific architecture and the investigation of their thermal stability under various temperatures.
2：Sample Selection and Data Sources:
Perovskite films and devices were prepared using specific materials and methods, and their performance was analyzed under different heat treatment conditions.
3：List of Experimental Equipment and Materials:
Included SnO2 colloid precursor, N, N-dimethylformamide (DMF), dimethylsulfoxide (DMSO), lead iodide (PbI2), formamidinium iodide (FAI), methylammonium bromide (MABr), methylammonium chloride (MACl), and Spiro-OMeTAD.
4：Experimental Procedures and Operational Workflow:
The fabrication process involved cleaning ITO substrates, depositing electron transfer layers, spin-coating perovskite layers, and applying hole-transporting materials and gold electrodes.
5：Data Analysis Methods:
The performance of the solar cells was evaluated using J–V characteristics, UV–vis absorption spectra, XRD patterns, and SEM images.
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