| People | Locations | Statistics |
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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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Hutter, Eline M.
Utrecht University
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (33/33 displayed)
- 2024Halide Mixing in Cs2AgBi(IxBr1-x)6 Double Perovskitescitations
- 2023Conduction band tuning by controlled alloying of Fe into Cs2AgBiBr6 double perovskite powderscitations
- 2022Traps in the spotlightcitations
- 2022Traps in the spotlight: How traps affect the charge carrier dynamics in Cs2AgBiBr6 perovskite
- 2022Metal halide perovskite toxicity effects on Arabidopsis thaliana plants are caused by iodide ionscitations
- 2022Halide perovskite materials as chemical playground
- 2021Efficient vacuum deposited p-i-n and n-i-p perovskite solar cells employing doped charge transport layerscitations
- 2021Recombination and localization: Unfolding the pathways behind conductivity losses in Cs2AgBiBr6 thin films: Unfolding the pathways behind conductivity losses in Cs2AgBiBr6 thin films
- 2021Recombination and localization: Unfolding the pathways behind conductivity losses in Cs 2 AgBiBr 6 thin filmscitations
- 2021Accelerated Hot-Carrier Cooling in MAPbI3 Perovskite by Pressure-Induced Lattice Compressioncitations
- 2021Reduced Barrier for Ion Migration in Mixed-Halide Perovskitescitations
- 2021Recombination and localization: Unfolding the pathways behind conductivity losses in Cs2AgBiBr6 thin filmscitations
- 2020Charge Carrier Dynamics upon Sub-bandgap Excitation in Methylammonium Lead Iodide Thin Films: Effects of Urbach Tail, Deep Defects, and Two-Photon Absorptioncitations
- 2020Quantifying Charge-Carrier Mobilities and Recombination Rates in Metal Halide Perovskites from Time-Resolved Microwave Photoconductivity Measurementscitations
- 2020Charge Carrier Dynamics upon Sub-bandgap Excitation in Methylammonium Lead Iodide Thin Filmscitations
- 2019Comparing the calculated fermi level splitting with the open-circuit voltage in various perovskite cellscitations
- 2019Charge Carriers Are Not Affected by the Relatively Slow-Rotating Methylammonium Cations in Lead Halide Perovskite Thin Filmscitations
- 2019Charge Carriers Are Not Affected by the Relatively Slow-Rotating Methylammonium Cations in Lead Halide Perovskite Thin Films.
- 2018Maximizing and stabilizing luminescence from halide perovskites with potassium passivationcitations
- 2018Maximizing and stabilizing luminescence from halide perovskites with potassium passivation
- 2018Band-Like Charge Transport in Cs2AgBiBr6 and Mixed Antimony-Bismuth Cs2AgBi1- xSbxBr6 Halide Double Perovskitescitations
- 2017Direct-indirect character of the bandgap in methylammonium lead iodide perovskite.
- 2017Vapour-Deposited Cesium Lead Iodide Perovskitescitations
- 2017Direct-indirect character of the bandgap in methylammonium lead iodide perovskitecitations
- 2017The Impact of Phase Retention on the Structural and Optoelectronic Properties of Metal Halide Perovskites.
- 2017Vapour-Deposited Cesium Lead Iodide Perovskites: Microsecond Charge Carrier Lifetimes and Enhanced Photovoltaic Performance.
- 2016Efficient vacuum deposited p-i-n and n-i-p perovskite solar cells employing doped charge transport layerscitations
- 2016The Impact of Phase Retention on the Structural and Optoelectronic Properties of Metal Halide Perovskitescitations
- 2016Strontium Insertion in Methylammonium Lead Iodidecitations
- 2016The Impact of Phase Retention on the Structural and Optoelectronic Properties of Metal Halide Perovskites.
- 2015Charge Carriers in Planar and Meso-Structured Organic-Inorganic Perovskitescitations
- 2015Mechanism of Charge Transfer and Recombination Dynamics in Organo Metal Halide Perovskites and Organic Electrodes, PCBM, and Spiro-OMeTADcitations
- 2015Mechanism of Charge Transfer and Recombination Dynamics in Organo Metal Halide Perovskites and Organic Electrodes, PCBM, and Spiro-OMeTAD: Role of Dark Carriers.citations
Places of action
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article
Direct-indirect character of the bandgap in methylammonium lead iodide perovskite.
Abstract
Metal halide perovskites such as methylammonium lead iodide (CH3NH3PbI3) are generating great excitement due to their outstanding optoelectronic properties, which lend them to application in high-efficiency solar cells and light-emission devices. However, there is currently debate over what drives the second-order electron-hole recombination in these materials. Here, we propose that the bandgap in CH3NH3PbI3 has a direct-indirect character. Time-resolved photo-conductance measurements show that generation of free mobile charges is maximized for excitation energies just above the indirect bandgap. Furthermore, we find that second-order electron-hole recombination of photo-excited charges is retarded at lower temperature. These observations are consistent with a slow phonon-assisted recombination pathway via the indirect bandgap. Interestingly, in the low-temperature orthorhombic phase, fast quenching of mobile charges occurs independent of the temperature and photon excitation energy. Our work provides a new framework to understand the optoelectronic properties of metal halide perovskites and analyse spectroscopic data.