| 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 |
|
Tukiainen, Antti
Tampere University
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (23/23 displayed)
- 2024Bridging the gap between surface physics and photonicscitations
- 2024Ti3+ Self-Doping-Mediated Optimization of TiO2 Photocatalyst Coating Grown by Atomic Layer Depositioncitations
- 2022Insights into Tailoring of Atomic Layer Deposition Grown TiO2 as Photoelectrode Coating
- 2022Luminescent (Er,Ho)2O3 thin films by ALD to enhance the performance of silicon solar cellscitations
- 2022Low-Temperature Route to Direct Amorphous to Rutile Crystallization of TiO2Thin Films Grown by Atomic Layer Depositioncitations
- 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
- 2021Luminescent (Er,Ho)2O3 thin films by ALD to enhance the performance of silicon solar cellscitations
- 2021Interface Engineering of TiO2 Photoelectrode Coatings Grown by Atomic Layer Deposition on Siliconcitations
- 2020Optimization of photogenerated charge carrier lifetimes in ald grown tio2 for photonic applicationscitations
- 2019Thermophotonic cooling in GaAs based light emitterscitations
- 2019Highly efficient charge separation in model Z-scheme TiO2/TiSi2/Si photoanode by micropatterned titanium silicide interlayercitations
- 2019Observation of local electroluminescent cooling and identifying the remaining challenges
- 2018Surface doping of GaxIn1−xAs semiconductor crystals with magnesiumcitations
- 2017Structured metal/polymer back reflectors for III-V solar cells
- 2016High-efficiency GaInP/GaAs/GaInNAs solar cells grown by combined MBE-MOCVD techniquecitations
- 2016Determination of composition and energy gaps of GaInNAsSb layers grown by MBEcitations
- 2016Optical Energy Transfer and Loss Mechanisms in Coupled Intracavity Light Emitterscitations
- 2016Combined MBE-MOCVD process for high-efficiency multijunction solar cells
- 2016High efficiency multijunction solar cells: Electrical and optical properties of the dilute nitride sub-junctions
- 2015Defects in dilute nitride solar cells
- 2015Dilute nitrides for boosting the efficiency of III-V multijunction solar cells
- 2004Effects of rapid thermal annealing on deep levels in n -GaInPcitations
Places of action
| Organizations | Location | People |
|---|
article
Tunable Ti3+-Mediated Charge Carrier Dynamics of Atomic Layer Deposition-Grown Amorphous TiO2
Abstract
Amorphous titania (am.-TiO2) has gained wide interest in the field of photocatalysis, thanks to exceptional disorder-mediated optical and electrical properties compared to crystalline TiO2. Here, we study the effects of intrinsic Ti3+ and nitrogen defects in am.-TiO2 thin films via the atomic layer deposition (ALD) chemistry of tetrakis(dimethylamido)titanium(IV) (TDMAT) and H2O precursors at growth temperatures of 100–200 °C. X-ray photoelectron spectroscopy (XPS) and computational analysis allow us to identify structural disorder-induced penta- and heptacoordinated Ti4+ ions (Ti5/7c4+), which are related to the formation of Ti3+ defects in am.-TiO2. The Ti3+-rich ALD-grown am.-TiO2 has stoichiometric composition, which is explained by the formation of interstitial peroxo species with oxygen vacancies. The occupation of Ti3+ 3d in-gap states increases with the ALD growth temperature, inducing both visible-light absorption and electrical conductivity via the polaron hopping mechanism. At 200 °C, the in-gap states become fully occupied extending the lifetime of photoexcited charge carriers from the picosecond to the nanosecond time domain. Nitrogen traces from the TDMAT precursor had no effect on optical properties and only little on charge transfer properties. These results provide insights into the charge transfer properties of ALD-grown am.-TiO2 that are essential to the performance of protective photoelectrode coatings in photoelectrochemical solar fuel reactors. ; Peer reviewed