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EFFECT OF ANNEALING TEMPERATURE ON THE FORMATION OF METHYL AMMONIUM TIN TRI-IODIDE PEROVSKITE THIN FILM
Abstract:
Methyl ammonium tin tri-iodide (MASnI3) perovskite thin films have gained significant attention due to their potential applications in photovoltaic devices. The formation of high-quality perovskite thin films is crucial for achieving efficient optoelectronic performance. Annealing is a critical step in the fabrication process that can greatly influence the film’s morphology, crystal structure, and overall performance. In this study, we investigate the effect of annealing temperature on the formation of MASnI3 perovskite thin films.
A series of MASnI3 perovskite thin films were prepared using a solution-based spin-coating method, followed by annealing at different temperatures ranging from X°C to Y°C. The influence of the annealing temperature on the film’s properties was characterized using various analytical techniques, including X-ray diffraction (XRD), scanning electron microscopy (SEM), and UV-Vis spectroscopy.
The XRD analysis revealed that the annealing temperature significantly affected the crystal structure of the MASnI3 thin films. At lower temperatures, the films exhibited a mixture of non-perovskite phases, whereas higher temperatures resulted in the formation of well-defined perovskite structures. SEM images demonstrated that the morphology and surface coverage of the films were also influenced by the annealing temperature. The films annealed at optimal temperatures showed improved surface smoothness and enhanced film continuity.
Furthermore, UV-Vis spectroscopy measurements indicated that the annealing temperature influenced the optical properties of the films. The films annealed at higher temperatures displayed improved light absorption and reduced energy bandgap, suggesting enhanced optoelectronic properties.
Overall, our findings demonstrate that the annealing temperature plays a critical role in the formation of high-quality MASnI3 perovskite thin films. Optimization of the annealing process can lead to improved film crystallinity, morphology, and optical properties, ultimately enhancing the performance of MASnI3-based photovoltaic devices.
Keywords: Methyl Ammonium Tin Tri-iodide, Perovskite Thin Film, Annealing Temperature, Crystal Structure, Morphology, Optoelectronic Properties.
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