Mesoporous TiO2-layer?s rheological impact on the perovskite solar cell performance

The rheological impact of the mesoporous-TiO2 (m-TiO2) layer was investigated, which impacted perovskite solar cell (PSC) performance. This also implies the significance of morphological variations according to the pastes' viscosity and corresponding thickness that cause a slight influence on their bandgap and hence device photovoltaic performance. The m-TiO2 paste results in a viscosity of 2.85 cP with a thickness of 1 mu m, indicating the bandgap of - 3.55 eV. In contrast, the higher viscous paste (3.85 cP) exhibits a slightly enhanced bandgap of - 3.64 nm, leading to a thickness of > 1 mu m. Besides, the data obtained from these analyses were used for cell performance analysis through the SCAPS 3.3 software-based simulation with a predicted power conversion ef- ficiency of 23.59 %. It was observed that the PSC's short circuit current density and the thickness of the m-TiO2 layer are inversely proportional, whereas the open-circuit voltage shows an independent effect on m-TiO2 vis- cosity. This study envisages an initial trade-off between the m-TiO2 layer's porosity, bandgap and thickness that can ensure the PSC with improved performance parameters.

Automated summary

The rheological impact of the m-TiO2 layer on the PSC performance was studied. The study highlights the importance of morphological variations caused by paste viscosity and thickness on bandgap and device photovoltaic performance. The data analysis showed that the m-TiO2 paste with a viscosity of 2.85 cP and a thickness of 1 μm had a bandgap of -3.55 eV, while the higher viscous paste (3.85 cP) exhibited a slightly enhanced bandgap of -3.64 nm with a thickness greater than 1 μm. Cell performance analysis predicted a power conversion efficiency of 23.59% using the SCAPS 3.3 software-based simulation.