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Verfasst von:Faßl, Paul [VerfasserIn]   i
 Lami, Vincent [VerfasserIn]   i
 Bausch, Alexandra [VerfasserIn]   i
 Wang, Zhiping [VerfasserIn]   i
 Klug, Matthew T. [VerfasserIn]   i
 Snaith, Henry J. [VerfasserIn]   i
 Vaynzof, Yana [VerfasserIn]   i
Titel:Fractional deviations in precursor stoichiometry dictate the properties, performance and stability of perovskite photovoltaic devices
Verf.angabe:Paul Fassl, Vincent Lami, Alexandra Bausch, Zhiping Wang, Matthew T. Klug, Henry J. Snaith and Yana Vaynzof
E-Jahr:2018
Jahr:13 Sep 2018
Umfang:12 S.
Fussnoten:Gesehen am 22.04.2020 ; Elektronische Zusatzinformationen (ESI) verfügbar
Titel Quelle:Enthalten in: Energy & environmental science
Ort Quelle:Cambridge : RSC Publ., 2008
Jahr Quelle:2018
Band/Heft Quelle:11(2018), 12, Seite 3380-3391
ISSN Quelle:1754-5706
Abstract:The last five years have witnessed remarkable progress in the field of lead halide perovskite materials and devices. Examining the existing body of literature reveals staggering inconsistencies in the reported results among different research groups with a particularly wide spread in the photovoltaic performance and stability of devices. In this work we demonstrate that fractional, quite possibly unintentional, deviations in the precursor solution stoichiometry can cause significant changes in the properties of the perovskite layer as well as in the performance and stability of perovskite photovoltaic devices. We show that while the absorbance and morphology of the layers remain largely unaffected, the surface composition and energetics, crystallinity, emission efficiency, energetic disorder and storage stability are all very sensitive to the precise stoichiometry of the precursor solution. Our results elucidate the origin of the irreproducibility and inconsistencies of reported results among different groups as well as the wide spread in device performance even within individual studies. Finally, we propose a simple experimental method to identify the exact stoichiometry of the perovskite layer that researchers can employ to confirm their experiments are performed consistently without unintentional variations in precursor stoichiometry.
DOI:doi:10.1039/C8EE01136B
URL:Bitte beachten Sie: Dies ist ein Bibliographieeintrag. Ein Volltextzugriff für Mitglieder der Universität besteht hier nur, falls für die entsprechende Zeitschrift/den entsprechenden Sammelband ein Abonnement besteht oder es sich um einen OpenAccess-Titel handelt.

Volltext ; Verlag: https://doi.org/10.1039/C8EE01136B
 Volltext: https://pubs.rsc.org/en/content/articlelanding/2018/ee/c8ee01136b
 DOI: https://doi.org/10.1039/C8EE01136B
Datenträger:Online-Ressource
Sprache:eng
K10plus-PPN:1695621557
Verknüpfungen:→ Zeitschrift

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