Journal
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS
Volume 411, Issue -, Pages 49-52Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.nimb.2017.01.082
Keywords
Synchrotron-based X-ray photoelectron spectroscopy; Perovskite solar cells; Atomic layer deposition; Al2O3
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Funding
- BTU Cottbus-Senftenberg
- German Research Foundation (DFG) [SCHM 745/311]
- EPSRC, UK
- EPSRC [EP/M024881/1] Funding Source: UKRI
- Engineering and Physical Sciences Research Council [EP/M024881/1] Funding Source: researchfish
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An ultrathin Al2O3 film deposited on methylammonium lead triiodide (CH3NH3PbI3) perovskite has the capability to suppress the carrier recombination process and improve the perovskite solar cells efficiency and stability. However, annealing at temperatures higher than 85 degrees C degrades the CH3NH3PbI3 perovskite film. The X-ray photoelectron spectroscopy study performed in this work indicates that it is possible to grow Al2O3 by atomic layer deposition on the perovskite at room temperature, however, besides pure Al2O3 some OH groups are found and the creation of lead and iodine oxides at the Al2O3/CH3NH3PbI3 interface takes place. (C) 2017 Elsevier B.V. All rights reserved.
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