| 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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Norrman, Kion
Technical University of Denmark
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (40/40 displayed)
- 2019Diluted Oxide Interfaces with Tunable Ground Statescitations
- 2018Oxygen Exchange and Transport in (La0.6Sr0.4)0.98FeO3-d – Ce0.9Gd0.1O1.95 Dual-Phase Compositescitations
- 2018High-temperature thermoelectric properties of Na- and W-Doped Ca3Co4O9 system citations
- 2018Oxygen Exchange and Transport in (La 0.6 Sr 0.4 ) 0.98 FeO 3-d – Ce 0.9 Gd 0.1 O 1.95 Dual-Phase Compositescitations
- 2017Mid-IR optical properties of silicon doped InPcitations
- 2017Dynamic and Impure Perovskite Structured Metal Oxide Surfacescitations
- 2016New Hypothesis for SOFC Ceramic Oxygen Electrode Mechanismscitations
- 2016In situ X-ray scattering of perovskite solar cell active layers roll-to-roll coated on flexible substratescitations
- 2016In situ X-ray scattering of perovskite solar cell active layers roll-to-roll coated on flexible substratescitations
- 2015Polarization Induced Changes in LSM Thin Film Electrode Composition Observed by In Operando Raman Spectroscopy and TOF-SIMS
- 2015Dynamic behavior of impurities and native components in model LSM microelectrodes on YSZcitations
- 2014TOF-SIMS characterization of impurity enrichment and redistribution in solid oxide electrolysis cells during operationcitations
- 2014TOF-SIMS investigation of degradation pathways occurring in a variety of organic photovoltaic devices – the ISOS-3 inter-laboratory collaborationcitations
- 2013Oxygen Electrode Kinetics and Surface Composition of Dense (La0.75Sr0.25)0.95MnO3 on YSZcitations
- 2013All polymer photovoltaics: From small inverted devices to large roll-to-roll coated and printed solar cellscitations
- 2013All polymer photovoltaics: From small inverted devices to large roll-to-roll coated and printed solar cellscitations
- 2013Oxygen Electrode Kinetics and Surface Composition of Dense (La 0.75 Sr 0.25 ) 0.95 MnO 3 on YSZcitations
- 2012TOF-SIMS investigation of degradation pathways occurring in a variety of organic photovoltaic devices - the ISOS-3 inter-laboratory collaborationcitations
- 2012TOF-SIMS investigation of degradation pathways occurring in a variety of organic photovoltaic devices - the ISOS-3 inter-laboratory collaborationcitations
- 2012Stability of Polymer Solar Cellscitations
- 2012Comprehensive Investigation of Silver Nanoparticle/Aluminum Electrodes for Copper Indium Sulfide/Polymer Hybrid Solar Cellscitations
- 2012TOF-SIMS investigation of degradation pathways occurring in a variety of organic photovoltaic devices–the ISOS-3 inter-laboratory collaborationcitations
- 2012Rapid flash annealing of thermally reactive copolymers in a roll-to-roll process for polymer solar cellscitations
- 2012TOF-SIMS investigation of degradation pathways occurring in a variety of organic photovoltaic devices – the ISOS-3 inter-laboratory collaborationcitations
- 2012TOF-SIMS investigation of degradation pathways occurring in a variety of organic photovoltaic devices – the ISOS-3 inter-laboratory collaborationcitations
- 2012Simultaneous multilayer formation of the polymer solar cell stack using roll-to-roll double slot-die coating from watercitations
- 2012Simultaneous multilayer formation of the polymer solar cell stack using roll-to-roll double slot-die coating from watercitations
- 2011Aqueous Processing of Low-Band-Gap Polymer Solar Cells Using Roll-to-Roll Methodscitations
- 2011Aqueous Processing of Low-Band-Gap Polymer Solar Cells Using Roll-to-Roll Methodscitations
- 2011Oxygen- and water-induced degradation of an inverted polymer solar cell: the barrier effectcitations
- 2011Water and oxygen induced degradation of small molecule organic solar cellscitations
- 2010Using Light-Induced Thermocleavage in a Roll-to-Roll Process for Polymer Solar Cellscitations
- 2010Degradation Patterns in Water and Oxygen of an Inverted Polymer Solar Cellcitations
- 2010Degradation Patterns in Water and Oxygen of an Inverted Polymer Solar Cellcitations
- 2010Stability and Degradation of Polymer Solar cells
- 2009Water-Induced Degradation of Polymer Solar Cells Studied by (H2O)-O-18 Labelingcitations
- 2008Effects of trace elements at the Ni/ScYSZ interface in a model solid oxide fuel cell anodecitations
- 2007Analysis of the failure mechanism for a stable organic photovoltaic during 10 000 h of testingcitations
- 2006Lifetimes of organic photovoltaics: Design and synthesis of single oligomer molecules in order to study chemical degradation mechanismscitations
- 2006Oxygen release and exchange in niobium oxide MEHPPV hybrid solar cellscitations
Places of action
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article
High-temperature thermoelectric properties of Na- and W-Doped Ca3Co4O9 system
Abstract
The detailed crystal structures and high temperature thermoelectric properties of polycrystalline Ca<sub>3−2<em>x</em></sub>Na<sub>2<em>x</em></sub>Co<sub>4−<em>x</em></sub>W<sub><em>x</em></sub>O<sub>9</sub> (0 ≤ <em>x</em>≤ 0.075) samples have been investigated. Powder X-ray diffraction datashow that all samples are phase pure, with no detectable traces ofimpurity. The diffraction peaks shift to lower angle values withincrease in doping (<em>x</em>), which is consistent with larger ionic radii of Na<sup>+</sup> and W<sup>6+</sup> ions. X-ray photoelectron spectroscopy data reveal that a mixture of Co<sup>2+</sup>, Co<sup>3+</sup> and Co<sup>4+</sup> valence states are present in all samples. It has been observed that electrical resistivity (<em>ρ</em>), Seebeck coefficient (<em>S</em>) and thermal conductivity (<em>κ</em>) are all improved with dual doping of Na and W in Ca<sub>3</sub>Co<sub>4</sub>O<sub>9</sub> system. A maximum power factor (PF) of 2.71 × 10<sup>−4</sup> W m<sup>−1</sup> K<sup>−2</sup> has been obtained for <em>x</em> = 0.025 sample at 1000 K. The corresponding thermoelectric figure of merit (<em>zT</em>) for <em>x</em> = 0.025 sample is calculated to be 0.21 at 1000 K, which is ∼2.3 times higher than <em>zT</em>value of the undoped sample. These results suggest that Na and W dualdoping is a promising approach for improving thermoelectric propertiesof Ca<sub>3</sub>Co<sub>4</sub>O<sub>9</sub> system.