Journal article
The effects of thermal annealing on the structure and the electrical transport properties of ultrathin gadolinia-doped ceria films grown by pulsed laser deposition
Microstructures and Interfaces, Fuel Cells and Solid State Chemistry Division, Risø National Laboratory for Sustainable Energy, Technical University of Denmark1
Fuel Cells and Solid State Chemistry Division, Risø National Laboratory for Sustainable Energy, Technical University of Denmark2
Risø National Laboratory for Sustainable Energy, Technical University of Denmark3
Paul Scherrer Institute4
Thermo Ceramics, Fuel Cells and Solid State Chemistry Division, Risø National Laboratory for Sustainable Energy, Technical University of Denmark5
Ceramic processing, Fuel Cells and Solid State Chemistry Division, Risø National Laboratory for Sustainable Energy, Technical University of Denmark6
Fuel Cells and Solid State Chemistry Division. Management, Fuel Cells and Solid State Chemistry Division, Risø National Laboratory for Sustainable Energy, Technical University of Denmark7
Optical Microsensors and Micromaterials, Department of Photonics Engineering, Technical University of Denmark8
Department of Photonics Engineering, Technical University of Denmark9
Ultrathin crystalline films of 10 mol% gadolinia-doped ceria (CGO10) are grown on MgO (100) substrates by pulsed laser deposition at a moderate temperature of 400°C. As-deposited CGO10 layers of approximately 4 nm, 14 nm, and 22 nm thickness consist of fine grains with dimensions ≤∼11 nm. The films show high density within the thickness probed in the X-ray reflectivity experiments.
Thermally activated grain growth, density decrease, and film surface roughening, which may result in the formation of incoherent CGO10 islands by dewetting below a critical film thickness, are observed upon heat treatment at 400°C and 800°C. The effect of the grain coarsening on the electrical characteristics of the layers is investigated and discussed in the context of a variation of the number density of grain boundaries.
The results are evaluated with regard to the use of ultrathin CGO10 films as seeding templates for the moderate temperature growth of thick solid electrolyte films with improved oxygen transport properties.
| Language: | English |
|---|---|
| Publisher: | Springer-Verlag |
| Year: | 2011 |
| Pages: | 845-850 |
| Journal subtitle: | Materials Science and Processing |
| ISSN: | 14320630 and 09478396 |
| Types: | Journal article |
| DOI: | 10.1007/s00339-011-6424-y |
| ORCIDs: | Pryds, Nini , Kuhn, Luise Theil , Esposito, Vincenzo , Linderoth, Søren and Schou, Jørgen |
Atomic Force Microscopy Characterization and Evaluation of Materials Condensed Matter Physics Electrical Transport Property Ionic Transport Property Nanotechnology Operating Procedures, Materials Treatment Optical and Electronic Materials Physics Pulse Laser Deposition Surfaces and Interfaces, Thin Films Topographical Atomic Force Microscopy Image
