研究目的
Investigating the role of nanoscale MAPbIxBr3-x perovskites as photosensitizers in solid-state dye-sensitized solar cells (ss-DSSCs) and comparing their performance with traditional molecular dye sensitizers.
研究成果
Nanoscale MAPbIxBr3-x perovskites can effectively serve as photosensitizers in ss-DSSCs, demonstrating a promising initial power conversion efficiency of ~7.2%. The study confirms that these perovskites function similarly to traditional dye sensitizers, with potential for further improvements.
研究不足
The study is in an early stage, and there is room for further optimization in terms of mesoporous electron-transporting layer, precursor selection, and deposition routes for enhanced performance.
1：Experimental Design and Method Selection:
A two-step sequential deposition method was used to prepare nanoscale MAPbIxBr3-x perovskites on mesoporous TiO2 films.
2：Sample Selection and Data Sources:
Mesoporous TiO2 films of ~1 μm thickness were used as the substrate.
3：List of Experimental Equipment and Materials:
Spin coater for deposition, SEM and TEM for morphological analysis, UV-Vis absorption, XRD, PL for structural and optical characterization.
4：Experimental Procedures and Operational Workflow:
Lead halides (PbI2 or PbBr2) were first adsorbed on TiO2 films, followed by reaction with MAI/MABr to form MAPbIxBr3-x.
5：Data Analysis Methods:
Impedance spectroscopy was used to analyze the working principles of the fabricated devices.
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