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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Jeon, Nam Joong
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (3/3 displayed)
- 2024Surface Engineering of Tin Oxide Nanoparticles by pH Modulation Facilitates Homogeneous Film Formation for Efficient Perovskite Solar Modulescitations
- 2020Transparent electrodes consisting of a surface-treated buffer layer based on tungsten oxide for semitransparent perovskite solar cells and four-terminal tandem applicationscitations
- 2017Spatial distribution of lead iodide and local passivation on organo-lead halide perovskitecitations
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article
Spatial distribution of lead iodide and local passivation on organo-lead halide perovskite
Abstract
<p>We identify nanoscale spatial distribution of PbI<sub>2</sub> on the (FAPbI<sub>3</sub>)<sub>0.85</sub>(MAPbBr<sub>3</sub>)<sub>0.15</sub>perovskite thin film and investigate the local passivation effect usingconfocal based optical microscopy of steady state and time-resolvedphotoluminescence (PL). Different from a typical scanning electronmicroscope (SEM) morphology study, confocal based PL spectroscopy andmicroscopy allow researchers to map the morphologies of both perovskiteand PbI<sub>2</sub> grains simultaneously, by selectively detectingtheir characteristic fluorescent bands using band-pass filters. In thiswork, we compare the perovskite samples without and with excess PbI<sub>2</sub> incorporation and unambiguously reveal PbI<sub>2</sub> distribution for the PbI<sub>2</sub>-rich sample. In addition, using the nanoscale time-resolved PL technique we show that the PbI<sub>2</sub>-rich regions exhibit longer lifetime due to suppressed defect trapping, compared to the PbI<sub>2</sub>-poor regions. The measurement on the PbI<sub>2</sub>-rich sample indicates that the passivation effect of PbI<sub>2</sub>in perovskite film is effective, especially in localized regions.Hence, this finding is important for further improvement of the solarcells by considering the strategy of excess PbI<sub>2</sub> incorporation.</p>