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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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Zhang, Tian
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Topics
Publications (6/6 displayed)
- 2022SHAPE PRESERVING NOISE ATTENUATION MODEL FOR 3-D-MODELING OF HERITAGE SITES BY PORTABLE LASER SCANScitations
- 2022HIGH FIDELITY EDGE AWARE NORMAL ESTIMATION FOR LOW RESOLUTION AND NOISY POINT CLOUDS OF HERITAGE SITES
- 2022Structural and Photophysical-Properties in Guanidinium-Iodide-Treated Perovskite Solar Cellscitations
- 2021Microfluidic Processing of Ligand-Engineered NiO Nanoparticles for Low-Temperature Hole-Transporting Layers in Perovskite Solar Cellscitations
- 2018Highly Conductive Poly(3,4-ethylenedioxythiophene) Polystyrene Sulfonate Polymer Coated Cathode for the Microbial Electrosynthesis of Acetate From Carbon Dioxidecitations
- 2011The decreasing radial wood stiffness pattern of some tropical trees growing in the primary forest is reversed and increases when they are grown in a plantationcitations
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article
Structural and Photophysical-Properties in Guanidinium-Iodide-Treated Perovskite Solar Cells
Abstract
Use of the guanidinium iodide (GAI) cation is widely recognized as an interface engineering technique for perovskite solar cells that deliver stability improvements via defect passivation on surfaces and grain boundaries. However, a comprehensive understanding of the relationship between the structural and photophysical properties is lacking. Herein, GAI-induced perovskite structural modifications, including derivative phases and underlying transitions, are detected in GAI surface-treated Cs0.07MA0.14FA0.79Pb(I0.83Br0.17)3 through an analysis of X-ray and electron diffraction and microscopy data. An optimum GAI solution concentration at 10 mg mL-1 can eliminate excess PbI2, improve crystallinity, and increase grain size of the as-prepared perovskite films. However, a further increase to 20–40 mg mL-1induces new (FAPbI3)x(GA2PbI4)x phases and a reduction in crystallinity and grain size. In addition, from confocal photoluminescence imaging, it is observed that 10 mg mL-1 GAI also helps to remove the microscale spatial heterogeneities, demonstrating optimum device performance. These results show that understanding the impact on structure and microstructure of the selection and concentration of surface treatment agents is critical for the homogenization of perovskite optoelectronic properties and achieving efficient device.