| 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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Tkachenko, Nikolai V.
Tampere University
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (19/19 displayed)
- 2024Laterally Bound Co Porphyrin on CdTe QD : A Long-Lived Charge-Separated Nanocompositecitations
- 2024Contactless analysis of surface passivation and charge transfer at the TiO 2-Si interfacecitations
- 2024Contactless analysis of surface passivation and charge transfer at the TiO 2-Si interfacecitations
- 2024Transient Absorption Spectroscopy of Filmscitations
- 2024Contactless analysis of surface passivation and charge transfer at the TiO2-Si interfacecitations
- 2023Laterally Bound Co Porphyrin on CdTe QD : A Long-Lived Charge-Separated Nanocompositecitations
- 2023Is Carrier Mobility a Limiting Factor for Charge Transfer in Tio2/Si Devices? A Study by Transient Reflectance Spectroscopycitations
- 2022Tunable Ti3+-Mediated Charge Carrier Dynamics of Atomic Layer Deposition-Grown Amorphous TiO2citations
- 2021Comparison of the heat-treatment effect on carrier dynamics in TiO2 thin films deposited by different methodscitations
- 2020Optimization of photogenerated charge carrier lifetimes in ald grown tio2 for photonic applicationscitations
- 2020Monitoring Charge Carrier Diffusion across a Perovskite Film with Transient Absorption Spectroscopycitations
- 2019Multiphoton Excitation of CsPbBr3 Perovskite Quantum Dots (PQDs) : How Many Electrons Can One PQD Donate to Multiple Molecular Acceptors?citations
- 2019Electronically Coupled Uranium and Iron Oxide Heterojunctions as Efficient Water Oxidation Catalystscitations
- 2019Electronically Coupled Uranium and Iron Oxide Heterojunctions as Efficient Water Oxidation Catalystscitations
- 2019Refractive index change dominates the transient absorption response of metal halide perovskite thin films in the near infraredcitations
- 2018Critical role and modification of surface states in hematite films for enhancing oxygen evolution activitycitations
- 2017Tailored Fabrication of Transferable and Hollow Weblike Titanium Dioxide Structurescitations
- 2015Subpicosecond to Second Time-Scale Charge Carrier Kinetics in Hematite-Titania Nanocomposite Photoanodescitations
- 2015Subpicosecond to Second Time-Scale Charge Carrier Kinetics in Hematite-Titania Nanocomposite Photoanodescitations
Places of action
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article
Monitoring Charge Carrier Diffusion across a Perovskite Film with Transient Absorption Spectroscopy
Abstract
We have developed a new noninvasive optical method for monitoring charge carrier diffusion and mobility in semiconductor thin films in the direction perpendicular to the surface which is most relevant for devices. The method is based on standard transient absorption measurements carried out in reflectance and transmittance modes at wavelengths below the band gap where the transient response is mainly determined by the change in refractive index, which in turn depends on the distribution of photogenerated carriers across the film. This distribution is initially inhomogeneous because of absorption at the excitation wavelength and becomes uniform over time via diffusion. By modeling these phenomena we can determine the diffusion constant and respective mobility. Applying the method to a 500 nm thick triple cation FAMACs perovskite film revealed that homogeneous carrier distribution is established in few hundred picoseconds, which is consistent with mobility of 66 cm2 (V s)-1. ; Peer reviewed