Synthesis of Perovskite Thin Films (FAPbBr1.6I1.4) by Spin Coating Technique for Tandem Solar Cells

• Main Authors: Laalioui, Saida, Alaoui, Kawtar Belrhiti, Ayadh, Widad, Ikken, Badr, Assali, Kassem El, Outzourhit, Abdelkader
• Format: Conference Proceeding
• Language: English
• Subjects: hybrid perovskite; mixed halide; perovskite solar cells; speed and time centrifgation; spin coating
• ISSN: 2380-7393
• DOI: 10.1109/IRSEC48032.2019.9078231

In this work, we have optimized the deposition parameters of the FAPbBr 1.6 I 1.4 perovskite thin films by the spin coating technique, namely the deposition speed and the centrifugation time. The thin layers of perovskite FAPbBr 1.6 I 1.4 were prepared by mixing the solution of PbBr 2 : DMF: DMSO and FAI: IPA and deposited on glass substrates by the one-step spin coating technique. Morpho-structural and optical techniques were used for the characterization of fabricated thin films. The results show that the variation of the speed and the centrifugation time has a significant effect on the morphology and optical properties of the FAPbBr 1.6 I 1.4 perovskite thin films. The structural characterization of the FAPbBr 1.6 I 1.4 films revealed the presence of the perovskite structure in a single cubic \alpha-\mathrm{FAPbBr}_{1.6}\mathrm{I}_{1.4} phase independently of the deposition conditions. The optimized thin film was deposited by spin coating at 4000 rpm during 30s has a band gap energy of 1.83 eV. Such a gap suitable for a top cell as tandem configuration with silicon bottom cell.