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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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Hodes, Gary
in Cooperation with on an Cooperation-Score of 37%
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Publications (4/4 displayed)
- 2018Self-Healing Inside APbBr3 Halide Perovskite Crystalscitations
- 2017New insights into the nanostructure of innovative thin film solar cells gained by positron annihilation spectroscopycitations
- 2016Valence and Conduction Band Densities of States of Metal Halide Perovskitescitations
- 2016CH3NH3PbBr3 is not pyroelectric, excluding ferroelectric-enhanced photovoltaic performancecitations
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article
CH3NH3PbBr3 is not pyroelectric, excluding ferroelectric-enhanced photovoltaic performance
Abstract
<p>To experimentally (dis)prove ferroelectric effects on the properties of lead-halide perovskites and of solar cells, based on them, we used second-harmonic-generation spectroscopy and the periodic temperature change (Chynoweth) technique to detect the polar nature of methylammonium lead bromide (MAPbBr<sub>3</sub>). We find that MAPbBr<sub>3</sub> is probably centrosymmetric and definitely non-polar; thus, it cannot be ferroelectric. Whenever pyroelectric-like signals were detected, they could be shown to be due to trapped charges, likely at the interface between the metal electrode and the MAPbBr<sub>3</sub> semiconductor. These results indicate that the ferroelectric effects do not affect steady-state performance of MAPbBr<sub>3</sub> solar cells.</p>