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

Valsalakumar, Sreeram; Roy, Anurag; Mallick, Tapas K; Hinshelwood, Justin; Sundaram, Senthilarasu


Sreeram Valsalakumar

Anurag Roy

Tapas K Mallick

Justin Hinshelwood


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 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-TiO2 layer are inversely proportional, whereas the open-circuit voltage shows an independent effect on m-TiO2 viscosity. 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.

Journal Article Type Article
Acceptance Date Jan 24, 2023
Online Publication Date Jan 25, 2023
Publication Date 2023-04
Deposit Date Mar 10, 2023
Publicly Available Date Mar 10, 2023
Journal Materials Letters
Print ISSN 0167-577X
Publisher Elsevier
Peer Reviewed Peer Reviewed
Volume 337
Article Number 133960
Keywords Bandgap, Electron transport layer, Perovskite solar cells, Rheology, TiO2 paste, Viscosity


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