研究目的
Investigating the impact of light-soaking on morphological domains in an operational cesium lead halide perovskite solar cell.
研究成果
The study reveals that light soaking affects the performance of perovskite solar cells by influencing the dynamics of photogenerated carriers and mobile ions. The impact is more pronounced in the domain interiors than at the domain boundaries. The findings suggest that engineering the domain interiors, in addition to the domain boundaries, is essential for improving the performance of perovskite solar cells.
研究不足
The study focuses on CsPbI3 perovskite solar cells, and the findings may not be directly applicable to other perovskite compositions. The impact of light soaking varies with perovskite composition and illumination power density.
1：Experimental Design and Method Selection:
High resolution and high sensitivity fluorescence lifetime imaging microscopy (FLIM) was used to investigate a fully operational perovskite solar cell. The dynamics of photogenerated carriers and mobile ions were studied under working conditions.
2：Sample Selection and Data Sources:
CsPbI3 perovskite solar cells with a common meso-porous structure were fabricated. FLIM images were acquired under different illumination conditions.
3：List of Experimental Equipment and Materials:
Fluorine-doped tin oxide (FTO) coated glass, compact TiO2 (c-TiO2), meso-porous TiO2 (mp-TiO2), CsI and PbI2 precursors, P3HT solution, gold electrode.
4：Experimental Procedures and Operational Workflow:
The cells were fabricated, encapsulated, and then subjected to FLIM measurements under bias light illumination and dark recovery conditions.
5：Data Analysis Methods:
PL decay traces were fitted using a bi-exponential function to extract effective decay lifetimes.
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