Epitaxial Getter Layer for Complex Oxide Brownmillerite Phase Transformation
- Detailed Technology Description
- A new process for forming unique brownmillerite-structured thin films was developed with the ability to spontaneously induce a phase transition at a buried layer of a complex oxide thin film heterostructure.
- Others
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Patent application: WO/2011/090963
Ferguson, J. D., Kim, Y., Kourkoutis, L. F.,Vodnick, A., Woll, A. R., Muller, D. A. and Brock, J. D. (2011), Epitaxial Oxygen Getter for a Brownmillerite Phase Transformation in Manganite Films. Adv. Mater.,23: 1226–1230
- *Abstract
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A new process for forming unique brownmillerite-structured thin films has recently been developed at Cornell. The unique feature of the invention is the ability to spontaneously induce a phase transition at a buried layer of a complex oxide thin film heterostructure, whereas previous structures of complex oxides in the brownmillerite phase have been seen mostly in bulk samples.
After forming a thin film with a perovskite crystal structure, the process employs a second, oxygen deficient, film that is grown epitaxially on the first. This getter layer causes diffusion of oxygen from the first film into the second and results in a phase transformation of the first film into a brownmillerite crystal structure. These new complex oxide thin films have a wide range of applications, including solid oxide fuel cells catalysts, oxygen sensors and other applications requiring oxygen anion diffusion.
Potential Applications
- High-temperature superconductors
- Fuel cell catalysts and electrolytes
- Oxygen sensors
Advantages
- Unique thin film structure
- Ease of processing using an oxygen getter layer
- *Licensing
- Martin Teschlmt439@cornell.edu(607) 254-4454
- Country/Region
- USA
