Studying VOC in lead free inorganic perovskite photovoltaics by tuning energy bandgap and defect density

Elango, I and Selvamani, M and Ramamurthy, PC and Kesavan, AV (2022) Studying VOC in lead free inorganic perovskite photovoltaics by tuning energy bandgap and defect density. In: Ceramics International .

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Abstract

In hybrid perovskite photovoltaics (hPPV) highest reported efficiency is ∼25.2%. However, stability and toxicity are major concern towards commercialization. To improve stability, various approaches were made by research communities. Utilizing inorganic perovskite photoactive materials is one such approach to improve stability. Toxic element ‘Pb’ can be substituted with suitable non-toxic elements such as ‘Sn’ without sacrificing efficiency and stability. In CsPbI3, replacing Sn in place of Pb results in the PCE of ∼13%. However, efficiency of this PV is lagging 12% as compared with hybrid perovskite PV. This difference should be overcome to compete with hPPV. To improve the efficiency of inorganic PPV various experimental strategies were adopted. In this study, SCAPS simulation was carried out on FTO/TiO2/CsSnI3/spiro-OMeTAD/Au by altering Eg, energetic position of conduction and valence band, defect density, and thickness of semiconductor. Obtained results were analyzed and reported in this work.

Item Type:	Journal Article
Publication:	Ceramics International
Publisher:	Elsevier Ltd
Additional Information:	The copyright for this article belongs to the Elsevier Ltd.
Keywords:	Defect density; Energy gap; Lead compounds; Perovskite solar cells; Stability, 1-D simulation; Band-gap tuning; Defects density; Eco-friendly; Inorganics; Lead-Free; Photovoltaics; SCAPS-1D; SCAPS-1d simulation; Thin-films, Perovskite
Department/Centre:	Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Date Deposited:	18 Jul 2022 10:18
Last Modified:	18 Jul 2022 10:18
URI:	https://eprints.iisc.ac.in/id/eprint/74965

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