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Title

Unbroken perovskite: interplay of morphology, electro-optical properties, and ionic movement

AuthorsCorrea-Baena, Juan-Pablo; Anaya, Miguel CSIC ORCID; Lozano, Gabriel CSIC ORCID; Tress, Wolfgang; Domanski, Konrad; Saliba, Michael; Matsui, Taisuke; Jacobsson, Tor Jesper; Calvo, Mauricio E. CSIC ORCID ; Abate, Antonio; Grätzel, Michael; Míguez, Hernán CSIC ORCID ; Hagfeldt, Anders
Issue Date6-Jul-2016
PublisherJohn Wiley & Sons
CitationAdvanced Materials 28(25): 5031-5037 (2016)
AbstractA study investigates the interplay of morphology, electro-optical properties, and ionic movement in an unbroken perovskite. By varying the thickness of the perovskite capping layer, the study investigate both its effect on the photocurrent to achieve record photovoltaic characteristics and on the crystal formation, which in turn is found to be responsible for the hysteresis behavior. Investigations have revealed that crystals of at least 150 nm are required to achieve high fill factor (FF) and hysteresis-free devices. The study demonstrates that thinner layers, composed of small crystals, show high series resistance and slower current transient behavior due to a change in ionic displacement behavior, yielding low FF and highly hysteretic current-voltage curves.
Publisher version (URL)https://doi.org/10.1002/adma.201600624
URIhttp://hdl.handle.net/10261/190765
DOI10.1002/adma.201600624
ISSN0935-9648
E-ISSN1521-4095
Appears in Collections:(ICMS) Artículos




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