Role of transition metal iodides in defect and charge dynamics of perovskite solar cells

Nath, B and Chaudhuri, RR and Shrivastava, M and Ramamurthy, PC and Mahapatra, DR and Hegde, G (2024) Role of transition metal iodides in defect and charge dynamics of perovskite solar cells. In: Solar Energy, 282 .

PDF Sol_eng_282_2024.pdf - Published Version Restricted to Registered users only Download (8MB) | Request a copy

Abstract

Thin film photovoltaics based on Methylammonium lead iodide (MAPbI3) have shown remarkable power conversion efficiency. However, the presence of material and electronic defects poses challenges for perovskite-based electronic devices. To address these challenges, defect passivation using suitable metal salts is investigated. In this work, the transition metal salt cuprous iodide (CuI) is used for defect passivation, modifying the optoelectronic characteristics, and enhancing photovoltaic performance. The incorporation of CuI alters the band structure of perovskite solar cells, resulting in enhanced charge extraction and changes in defect characteristics. Effective charge carrier density rises due to the alignment of band edges between the transport layer and the absorber layer, enhancing open circuit voltage and power conversion efficiencies. Capacitance-based measurements are conducted to assess these improvements, providing insights into defect properties, charge trapping and de-trapping at defect sites, charge transport mechanisms, and charge accumulation. This work highlights the potential of CuI as a defect passivation strategy in perovskite solar cells. The performance and stability of these solar cells can be further optimised by adjusting the electronic characteristics of perovskite. © 2024 International Solar Energy Society

Item Type:	Journal Article
Publication:	Solar Energy
Publisher:	Elsevier Ltd
Additional Information:	The copyright for this article belongs to the publisher.
Keywords:	Charge trapping; Copper compounds; Defect density; Iodine compounds; Mercury compounds; Solar power generation; Zinc compounds, Charge dynamics; Cuprous iodide; Defect dynamics; Defect passivation; Defect tolerance; Lead iodide; Metal iodide; Metal salt; Power conversion efficiencies; Thin film photovoltaics, Perovskite, cell; dynamic analysis; optimization; perovskite; photovoltaic system; transition element
Department/Centre:	Division of Electrical Sciences > Electronic Systems Engineering (Formerly Centre for Electronic Design & Technology) Division of Interdisciplinary Sciences > Centre for Biosystems Science and Engineering Division of Interdisciplinary Sciences > Interdisciplinary Centre for Energy Research Division of Mechanical Sciences > Aerospace Engineering(Formerly Aeronautical Engineering) Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Date Deposited:	16 Oct 2024 10:52
Last Modified:	16 Oct 2024 10:52
URI:	http://eprints.iisc.ac.in/id/eprint/86476

Actions (login required)

View Item