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.
Author: | Małgorzata KotORCiD, Chittaranjan DasORCiD, Zhiping Wang, Karsten HenkelORCiDGND, Zied Rouissi, Konrad Wojciechowski, Henry J. Snaith, Dieter SchmeißerORCiD |
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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 |