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The effects of doping and coating on degradation kinetics in perovskites

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cris.lastimport.scopus2024-02-12T20:20:50Z
dc.abstract.enIn the last few years, perovskite-based solar cells have seen rapid improvements of their power conversion efficiencies (PCE) that have already reached silicon cell values. The commercial use of perovskite cell technology remains, however, a challenge due to durability issues. In fact, perovskite films when exposed to moisture and oxygen undergo degradation within a couple of hours or days. In order to address these problems, several strategies have been developed in recent years, including surface passivation and coating. Herein, we analyze and compare two perovskite stability improvement approaches, each aimed at the reduction of the oxygen diffusion, one by adding chlorine to perovskite precursors in order to block iodine vacancy sites, and the other by coating the perovskite layers with protective Al2O3 films using Atomic Layer Deposition (ALD). The study provides an experimental verification of the degradation mechanism linking it to oxygen diffusion into the perovskite films. As shown by X-ray photoelectron spectroscopy (XPS) analysis, the addition of chlorine into the iodine-based perovskite film slows down the oxygen diffusion, while X-ray diffraction (XRD) measurements show improved stability of such iodide perovskite with chlorine addition. Characteristic times for oxygen diffusion into subsurface region as well as for degradation process of film volume are provided and discussed. XRD measurements are also used to show that an additional significant stability improvement can also be achieved when the films are coated with a protective ALD Al2O3 layer.
dc.affiliationUniwersytet Warszawski
dc.contributor.authorGodlewski, Marek
dc.contributor.authorWincukiewicz, A.
dc.contributor.authorJasinski, Jacek
dc.contributor.authorTokarczyk, Mateusz
dc.contributor.authorPietruszka, Rafał
dc.contributor.authorKamińska, Maria
dc.date.accessioned2024-01-26T10:11:09Z
dc.date.available2024-01-26T10:11:09Z
dc.date.issued2021
dc.description.financePublikacja bezkosztowa
dc.description.volume230
dc.identifier.doi10.1016/J.SOLMAT.2021.111142
dc.identifier.issn0927-0248
dc.identifier.urihttps://repozytorium.uw.edu.pl//handle/item/122165
dc.identifier.weblinkhttps://api.elsevier.com/content/article/PII:S0927024821001847?httpAccept=text/xml
dc.languageeng
dc.pbn.affiliationphysical sciences
dc.relation.ispartofSolar Energy Materials and Solar Cells
dc.relation.pages111142-1-9
dc.rightsClosedAccess
dc.sciencecloudnosend
dc.subject.enSolar cells
dc.subject.enPhotovoltaics
dc.subject.enPerovskites
dc.subject.enDegradation mechanism
dc.subject.enMethylammonium lead halides
dc.titleThe effects of doping and coating on degradation kinetics in perovskites
dc.typeJournalArticle
dspace.entity.typePublication