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Morphology modulated brookite TiO2 and BaSnO3 as alternative electron transport materials for enhanced performance of carbon perovskite solar cells

Bhandari, Shubhranshu; Roy, Anurag; Mallick, Tapas Kumar; Sundaram, Senthilarasu


Shubhranshu Bhandari

Anurag Roy

Tapas Kumar Mallick


Designing alternatives to TiO2 electron-transport layers (ETLs) for facile electron extraction and transport to enhance the efficiency of n-i-p structured carbon perovskite solar cells (CPSC) is still a less explored research interest. In this work, the combined effect of the phase and morphology of BaSnO3 (BSO) and brookite TiO2 (BTO) nanostructured materials are explored as alternative electron transport layers (ETLs) instead of dominating anatase TiO2 in CPSC. The highest power-conversion efficiencies (PCEs) of CPSCs with rod-shaped BTO and BSO were recorded at ∼15.02% and ∼13.4%, respectively, which claims the highest efficiency for BTO and BSO CPSCs in ambient conditions to the best of our knowledge. In addition, our findings indicate that the CPSC's with rod structured BTO and BSO exhibited decreased charge recombination and improved efficiency compared to concerning spherical morphologies (12.5% for BSO nanoparticles) and cubic particles (14% for BTO nanocubes) due to the superior photogenerated charge-carrier extraction and enhanced interface quality. This research will open the door for various morphologies of alternative ETL materials and their physicochemical understanding toward achieving high-efficiency ambient CPSCs.

Journal Article Type Article
Acceptance Date Jun 2, 2022
Online Publication Date Jun 3, 2022
Publication Date 2022-10
Deposit Date Jul 15, 2022
Publicly Available Date Jul 15, 2022
Journal Chemical Engineering Journal
Print ISSN 1385-8947
Publisher Elsevier
Peer Reviewed Peer Reviewed
Volume 446
Issue 5
Article Number 137378
Keywords BaSnO3 nanorods, Brookite TiO2 nanorods, Spherical and cube-like nanoparticles, Fabrication engineering of carbon perovskite device, Interfacial charge transfer
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