Abstract
This study is centered on the exploration of the inorganic perovskite material RbGeBr3 as an absorbing layer in various configurations of perovskite solar cells (PSCs). The Poisson, continuity, and transport equations are solved using the finite element method for calculation. Systematic variations in the thicknesses of the RbGeBr3 absorber layer and the electron transfer layer are performed, with gold (Au) and silver (Ag) utilized as metal contacts for the electrodes. The study also delves into the impact of temperature variations on the efficacy of these structures. Among the tested configurations, the FTO/TiO2/RbGeBr3/P3HT/Au configuration emerges as the most efficient, achieving a power conversion efficiency of 11.89 %, with a short-circuit current of 14.47 mA/cm2 and an open-circuit voltage of 0.96 V. Additionally, two alternative structures, FTO/ITO/RbGeBr3/PEDOT:PSS/Au and FTO/ITO/RbGeBr3/PEDOT:PSS/Ag, are investigated, yielding comparable power conversion efficiencies of 11.374 %. The findings of this study can serve as valuable insights for the design of more advanced and efficient perovskite solar cells based on mineral perovskite layers.
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