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Room-Temperature Atomic Layer Deposition of Al₂O₃: Impact on Efficiency, Stability and Surface Properties in Perovskite Solar Cells

  • In this work, solar cells with a freshly made CH₃NH₃PbI₃ perovskite film showed a power conversion efficiency (PCE) of 15.4 % whereas the one with 50 days aged perovskite film only 6.1 %. However, when the aged perovskite was covered with a layer of Al₂O₃ deposited by atomic layer deposition (ALD) at room temperature (RT), the PCE value was clearly enhanced. X-ray photoelectron spectroscopy study showed that the ALD precursors are chemically active only at the perovskite surface and passivate it. Moreover, the RT-ALD-Al2O3-covered perovskite films showed enhanced ambient air stability.

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Metadaten
Author: Małgorzata KotORCiD, Chittaranjan DasORCiD, Zhiping Wang, Karsten HenkelORCiDGND, Zied Rouissi, Konrad Wojciechowski, Henry J. Snaith, Dieter SchmeißerORCiD
DOI:https://doi.org/10.1002/cssc.201601186
ISSN:1864-5631
ISSN:1864-564X
Title of the source (English):ChemSusChem
Document Type:Scientific journal article peer-reviewed
Language:English
Year of publication:2016
Tag:Al₂O₃; X-ray photoelectron spectroscopy (XPS); atomic layer deposition (ALD); perovskite; solar cells
Volume/Year:9
Issue number:24
First Page:3401
Last Page:3406
Faculty/Chair:Fakultät 1 MINT - Mathematik, Informatik, Physik, Elektro- und Informationstechnik / FG Angewandte Physik und Halbleiterspektroskopie
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