Abstract
In this work, experiments were carried out to investigate the effect of the fabrication and annealing temperature on the optical absorption, morphological, and crystalline structure of prepared Perovskite thin films. The investigated Perovskite composite is a mixed organic-inorganic FA0.5MA0.5PbI3 thin film. Three samples of FA0.5MA0.5PbI3 solutions were synthesized at 25 °C, 50 °C, and 70 °C. Three thin films of each prepared solution were then deposited on glass substrates and annealed at 25 °C, 50 °C, and 70 °C. The prepared solutions and materials were characterized by using UV–Vis spectroscopy, Atomic Force Microscopy (AFM), Fourier Transform Infrared Microscopy (FTIR), Zeta potential, and X-ray Diffraction (XRD) measurements. The characterized thin films revealed differences in morphology, structural stability, and optical absorption as a function of temperature. From the obtained results, thin films that were synthesized and annealed at 70 °C showed a 20% optical and structural enhancement more than other structures. So the temperature of 70 °C is the most suitable temperature for synthesizing and annealing in order to enhance the Perovskite crystallization.
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