Effect of Cesium Iodide (CsI) Concentration Variation on the Performance of MethylAmmonium Lead Iodide (MAPbI₃)-based Perovskite Solar Cells

Authors

  • Shakahuddin Zaki Department of Physics, Faculty of Mathematics and Natural Sciences, Universitas Andalas, Padang, 25173, Indonesia
  • Dahyunir Dahlan Department of Physics, Faculty of Mathematics and Natural Sciences, Universitas Andalas, Padang, 25173, Indonesia
  • Siti Naqiyah Sadiqin Institute of Microengineering and Nanoelectronics, Universiti Kebangsaan Malaysia, 43600 UKM Bangi, Selangor, Malaysia
  • Akrajas Ali Umar Institute of Microengineering and Nanoelectronics, Universiti Kebangsaan Malaysia, 43600 UKM Bangi, Selangor, Malaysia

DOI:

https://doi.org/10.25077/jif.17.2.146-156.2025

Keywords:

cesium iodide, device performane , MAPbI3

Abstract

The fabrication of MAPbI3 perovskite solar cell (PSC) devices with the modification of adding cesium iodide (CsI) into the PbI2 layer to enhance performance has been successfully carried out. The used synthesis method was a two-step spin coating with CsI concentration variations: without CsI (control), 2 mg/mL, 3 mg/mL, and 5 mg/mL. Characterization using UV-vis, FESEM, and XRD showed improved in optical properties, morphology, and crystal stability. The UV-Vis spectrum indicated an increase in absorption from 2.29 to 3.17 a.u after CsI addition. FESEM results revealed that a 3 mg/mL CsI concentration produced a uniform morphology, a more compact film layer, and clear grain boundaries compared to other concentrations. XRD analysis showed a 2θ peak shift of 0.04°, indicating changes in crystal lattice parameters and increased lattice density without altering MAPbI₃ crystallinity. The device with 3 mg/mL CsI achieved an open-circuit voltage (Voc) of 1.2 V, a short-circuit current density (Jsc) of 11.34 mA/cm², a fill factor (FF) of 0.65, a power conversion efficiency (PCE) of 2.8%. In conclusion, 3 mg/mL CsI successfully enhanced PSC performance, but performance declined to 5 mg/mL.

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References

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Published

2025-06-01

How to Cite

Zaki, S., Dahlan, D., Sadiqin, S. N., & Umar, A. A. (2025). Effect of Cesium Iodide (CsI) Concentration Variation on the Performance of MethylAmmonium Lead Iodide (MAPbI₃)-based Perovskite Solar Cells. JURNAL ILMU FISIKA | UNIVERSITAS ANDALAS, 17(2), 146–156. https://doi.org/10.25077/jif.17.2.146-156.2025

Issue

Vol. 17 No. 2 (2025): September 2025

Section

Research Article

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Copyright (c) 2025 Shakahuddin Zaki, Dahyunir Dahlan, Siti Naqiyah Sadiqin, Akrajas Ali Umar

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