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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

Authors

Sreeram Valsalakumar

Anurag Roy

Tapas K Mallick

Justin Hinshelwood



Abstract

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.

Citation

Valsalakumar, S., Roy, A., Mallick, T. K., Hinshelwood, J., & Sundaram, S. (2023). Mesoporous TiO2-layer’s rheological impact on the perovskite solar cell performance. Materials Letters, 337, Article 133960. https://doi.org/10.1016/j.matlet.2023.133960

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 29, 2024
Journal Materials Letters
Print ISSN 0167-577X
Publisher Elsevier
Peer Reviewed Peer Reviewed
Volume 337
Article Number 133960
DOI https://doi.org/10.1016/j.matlet.2023.133960
Keywords Bandgap, Electron transport layer, Perovskite solar cells, Rheology, TiO2 paste, Viscosity

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