| People | Locations | Statistics |
|---|---|---|
| Naji, M. |
| |
| Motta, Antonella |
| |
| Aletan, Dirar |
| |
| Mohamed, Tarek |
| |
| Ertürk, Emre |
| |
| Taccardi, Nicola |
| |
| Kononenko, Denys |
| |
| Petrov, R. H. | Madrid |
|
| Alshaaer, Mazen | Brussels |
|
| Bih, L. |
| |
| Casati, R. |
| |
| Muller, Hermance |
| |
| Kočí, Jan | Prague |
|
| Šuljagić, Marija |
| |
| Kalteremidou, Kalliopi-Artemi | Brussels |
|
| Azam, Siraj |
| |
| Ospanova, Alyiya |
| |
| Blanpain, Bart |
| |
| Ali, M. A. |
| |
| Popa, V. |
| |
| Rančić, M. |
| |
| Ollier, Nadège |
| |
| Azevedo, Nuno Monteiro |
| |
| Landes, Michael |
| |
| Rignanese, Gian-Marco |
|
Botti, Silvana
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (15/15 displayed)
- 2024Ni‐Alloyed Copper Iodide Thin Films: Microstructural Features and Functional Performancecitations
- 2024FAIR Data Infrastructure with Enhanced Functionality and Domain Specific Applications
- 2024FAIR Data Infrastructure with Enhanced Functionality and Domain Specific Applications
- 2024Computational prediction and characterization of CuI-based ternary p-type transparent conductors †citations
- 2023Structure prediction and characterization of CuI-based ternary $p$-type transparent conductors
- 2023Optical properties of Ag<sub><i>x</i></sub>Cu<sub>1–<i>x</i></sub>I alloy thin filmscitations
- 2022Computational screening of materials with extreme gap deformation potentialscitations
- 2021Unveiling Planar Defects in Hexagonal Group IV Materials
- 2021Unveiling Planar Defects in Hexagonal Group IV Materialscitations
- 2020Atomic scale structure and its impact on the band gap energy for Cu2Zn(Sn,Ge)Se(4)kesterite alloys
- 2020Atomic scale structure and its impact on the band gap energy for Cu$_{2}$Zn(Sn,Ge)Se$_{4}$ kesterite alloyscitations
- 2019Mechanism of surface passivation of methylammonium lead tribromide single crystals by benzylaminecitations
- 2019Mechanism of surface passivation of methylammonium lead tribromide single crystals by benzylaminecitations
- 2005Energy dependence of the exchange-correlation kernel of time-dependent density functional theory: A simple model for solidscitations
- 2005Energy dependence of the exchange-correlation kernel of time-dependent density functional theory: A simple model for solidscitations
Places of action
| Organizations | Location | People |
|---|
article
Mechanism of surface passivation of methylammonium lead tribromide single crystals by benzylamine
Abstract
<p>Hybrid organic-inorganic perovskites are semiconductors that have great potential for optoelectronic applications such as light-emitting diodes, photodetectors, and solar cells. In such devices, the surface plays a crucial role in the performance and stability, as it strongly influences the recombination rate of excited charge carriers. It is reported that molecular ligands such as benzylamine are capable of reducing the surface trap state density in thin films. In this work, we aim to clarify the mechanisms that govern the surface passivation of hybrid perovskites by benzylamine. We developed a versatile approach to investigate the influence of benzylamine passivation on the well-defined surface of freshly cleaved hybrid perovskite crystals. We show that benzylamine permanently passivates surface trap states in these single crystals, resulting in enhanced photoluminescence and charge carrier lifetimes. Additionally, we show that exposure to benzylamine leads to the replacement of the methylammonium cations by benzylammonium, thereby creating a thermodynamically more stable two-dimensional (2D) perovskite (BA)(2)PbBr4 on the surface of the three-dimensional crystal. This conversion to a 2D perovskite drives an anisotropic etching of the crystal surface, with the {100} planes being most prone to etching. Initially, square etching pits appear spread over the surface. As time elapses, these etching pits broaden and merge to yield large flat terraces that are oriented normally to the cleaving plane when they form. A thorough understanding of the mechanisms governing the surface passivation is crucially important to optimize and design novel passivation schemes, with the ultimate goal of further advancing the efficiency of optoelectronic devices based on hybrid perovskites.</p>