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

S. Valsalakumar, A. Roy, T.K. Mallick, J. Hinshelwood, S. Sundaram

Research output: Contribution to journalArticlepeer-review

Abstract

The rheological impact of the mesoporous-TiO 2 (m-TiO 2) 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-TiO 2 paste results in a viscosity of 2.85 cP with a thickness of 1 μm, 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 μm. 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 efficiency of 23.59 %. It was observed that the PSC's short circuit current density and the thickness of the m-TiO 2 layer are inversely proportional, whereas the open-circuit voltage shows an independent effect on m-TiO 2 viscosity. This study envisages an initial trade-off between the m-TiO 2 layer's porosity, bandgap and thickness that can ensure the PSC with improved performance parameters.

Original languageEnglish
Article number133960
JournalMaterials Letters
Volume337
DOIs
Publication statusPublished - 25 Jan 2023

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