研究目的
Investigating the effect of substrate temperature, laser energy, and post-deposition annealing on the structural, morphological, and optical properties of laser-ablated perovskite BaSnO3 films for excitonic solar cell applications.
研究成果
The study concludes that BaSnO3 thin films with high crystalline quality and optimal optical properties can be achieved at a substrate temperature of 600 °C, laser energy of 60 mJ, and post-deposition annealing at 900 °C. These conditions are optimal for excitonic solar cell applications due to the films' high transmittance and luminescence properties in the visible region.
研究不足
The study is limited by the specific conditions of pulsed-laser ablation method and the range of substrate temperatures, laser energies, and annealing temperatures explored. Potential areas for optimization include exploring a wider range of deposition parameters and alternative deposition techniques.
1：Experimental Design and Method Selection:
The study employed pulsed-laser ablation method for depositing BaSnO3 thin films on quartz substrates, systematically varying substrate temperature, laser energy, and post-deposition annealing to study their effects.
2：Sample Selection and Data Sources:
BaSnO3 films were prepared at different substrate temperatures (400, 500, 600 °C) and laser energies (50, 60, 70 mJ), with post-deposition annealing at temperatures ranging from 700 to 1000 °C.
3：List of Experimental Equipment and Materials:
Used a frequency tripled laser radiation from a Quanta Ray-INDI Series-Spectra Physics Q switched Nd:YAG laser, XPERT PRO diffractometer, scanning electron microscopy (SEM), atomic force microscopy (AFM), X-ray photoelectron spectrometer (XPS), and Perkin Elmer Lambda 950 spectrophotometer.
4：Experimental Procedures and Operational Workflow:
Films were characterized by XRD, SEM, AFM, XPS, and UV–visible spectroscopy to analyze structural, morphological, and optical properties.
5：Data Analysis Methods:
Data were analyzed using Scherer formula for crystallite size, Williamson–Hall analysis for strain-induced broadening, and Tauc plot for band gap energy.
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