Effect of cuprous iodide passivation in perovskite solar cells

Nath, B and Ramamurthy, PC and Mahapatra, DR and Hegde, G (2022) Effect of cuprous iodide passivation in perovskite solar cells. In: Journal of Materials Science: Materials in Electronics, 33 (18). pp. 14457-14467.

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Abstract

Abstract Perovskite solar cells have become a very researchable topic because of their interesting properties and very high-power conversion efficiency. Defects in the absorber layer are the origin of trap-states and hinder the power conversion efficiency of perovskite solar cells in approaching the Shockley–Queisser limit. Here, P–I–N structured devices were fabricated and passivated using Cuprous iodide. The effect of passivation was analyzed by studying the charge carrier concentration and characteristics. Passivation imparts lowering of defects in the bandgap that was observed by the difference in photoluminescence counts and drop in Urbach energy by ~ 24%. This lowered defect will give rise to lower recombination in the active material. The effect of altering the defects was demonstrated by the device performance by various material and electrical characterizations. Lowering of the defect levels has been established from the power conversion efficiency enhancement of 18.5% along with lowering of hysteresis has been observed for passivated devices. The role of defects in the device performance and the change in device parameters have been investigated with varying defect concentrations of different types of defects using SCAPs-1D simulation software.

Item Type:	Journal Article
Publication:	Journal of Materials Science: Materials in Electronics
Publisher:	Springer
Additional Information:	The copyright for this article belongs to the Springer
Keywords:	Carrier concentration; Computer software; Conversion efficiency; Passivation; Perovskite; Perovskite solar cells, Absorber layers; Active material; Charge carrier concentrations; Device performance; High power conversion; Power conversion efficiencies; Property; Shockley-queisser limits; Trap state; Urbach energy, Defects
Department/Centre:	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:	29 Jun 2022 10:23
Last Modified:	29 Jun 2022 10:23
URI:	https://eprints.iisc.ac.in/id/eprint/74094

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