Abstract
Optical characterizations of thin films of methylammonium lead tri-iodide (MAPbI3) have been investigated. A variety of samples were prepared at various temperatures using the spray pyrolysis technique. X-ray diffractograms have shown that prepared MAPbI3 films have a crystal structure on various substrates. The formation of a tetragonal structure was shown by peaks in the XRD spectrum, but PbI2 shows peaks over the entire spectral range of the films. The uniformity of the sprayed surface was studied using scanning electron microscopy (SEM). The SEM illustrated that the uniform appearance, but with small pinholes and the absence of agglomerations, covers the entire surface. To research optical properties, optical transmission is employed. The value of the optical energy difference decreases from 1.37 to 1.4 eV. The findings obtained can be seen as a good solution for obtaining more homogeneous and coherent layers used for applications of high-performance solar cells.
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Acknowledgements
This work was supported by VTRS and UDERZA laboratories of El-Oued University and University of Biskra. The authors gratefully knowledge Zoulikha Hebboul from University of Laghouat, Pr. Nouar Tabet from Physics Department, University of Sharjah, for their valuable help and support.
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Kemerchou, I., Khechekhouche, A., Timoumi, A. et al. Study of the chemical structure of CH3NH3PbI3 peroveskite films deposited on different substrates. J Mater Sci: Mater Electron 32, 3303–3312 (2021). https://doi.org/10.1007/s10854-020-05078-9
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DOI: https://doi.org/10.1007/s10854-020-05078-9