Opto-electrical modeling of CsPbBr3 based all-inorganic perovskite solar cell

The robust stability of all-inorganic perovskite solar cells against ambient climatic conditions has drawn huge attention as one of the major emerging research topics. In this work, we reported a detailed performance analysis of a highly stable all-inorganic cesium lead bromide (CsPbBr3) based perovskite solar cell via a combination of optical modeling and electrical simulation. The impact of material choice on device performance is shown by considering three different electron-transporting and three different hole-transporting layers. From the optical modeling, it is found that ZnO and MoO3 combination gives the best device performance with CsPbBr3 as a light-absorbing layer. Introducing the optimized thickness parameter of each layer from the optical modeling into the electrical simulation we have also studied the influence of different key parameters, such as doping concentration and defect densities of the active layer, and the work function of the anode. All simulations are performed considering AM1.5G spectra. For the optimized device architecture, with configuration FTO(200 nm)/ZnO(10 nm)/CsPbBr3(400 nm)/MoO3(20 nm)/Gold, encouraging results with short circuit current density (Jsc) of 8.89 mA/cm2 and power conversion efficiency of 14.12% has been achieved. This study shows that rather than solely depending on optical modeling or electrical simulation, a combined study of optical modeling and electrical simulation examines the performance more precisely and optimizing the optoelectrical performance it can contribute to designing and achieving high-performance all-inorganic perovskite solar cells experimentally in future research.