研究目的
To investigate the refractive index, extinction coefficients, and dielectric functions of CsPbI3 inorganic perovskite thin film at different incident angles in the visible range for the first time.
研究成果
The CsPbI3 inorganic perovskite thin film exhibits a lower refractive index and higher extinction coefficient compared to other inorganic semiconductors and hybrid perovskites, making it suitable for light harvesting applications. The study provides valuable information for the design of cesium lead halide-based perovskite tandem solar cells.
研究不足
The study is limited to the optical and dielectric properties of CsPbI3 thin films in the visible range and does not explore their performance in actual optoelectronic devices.
1：Experimental Design and Method Selection:
The study involved the preparation of CsPbI3 thin films on ITO glass substrates and their characterization using ellipsometry, X-ray diffraction, scanning electron microscopy, UV-Vis spectroscopy, and photoluminescence spectroscopy.
2：Sample Selection and Data Sources:
CsPbI3 perovskite thin films were prepared by spin coating a precursor solution onto ITO glass substrates.
3：List of Experimental Equipment and Materials:
J.A. Woollam V-VASE ellipsometer, Bruker Model D8 Discover X-ray Diffractometer, FESEM Quanta 200 FEI, UV-2401 PC UV–Vis recording spectrometer, F-4500 Fluorescence Spectrometer.
4：Experimental Procedures and Operational Workflow:
The optical constants were measured at different incident angles, and structural and morphological properties were analyzed.
5：Data Analysis Methods:
The refractive index, extinction coefficient, and dielectric functions were calculated from the ellipsometry data, and the band gap was determined using Tauc plot.
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