High Temperature Thermoelectrics Based on Natural Superlattice Oxides
Thermoelectric (TE) devices play a crucial role in efficient energy harvesting, and recovery. At high temperatures, however, their usage has currently been hampered by the limitations of current TE materials, being structurally unstable, toxic and/or exotic. This project, which will be performed by the candidate at Harvard University for a period of thirty six months, aims to employ a "thermodynamically-stable nanostructurnig" approach to develop high-temperature TE oxides with enhance properties. To achieve this goal, it is planned to conduct a systematic investigation of several oxides forming natural superlattices, including (ZnO)k-In2O3 systems, in order to gain novel insights into synthesis-structure-property relationships in TE oxides. This will be carried out by means of a combination of extensive microstructural analysis (using e.g., aberration-corrected TEM and APT) and first principles calculations. The cornerstone of the project includes a methodological contribution to explore all the interfacial chemistry changes in nanostructured oxides for the first time on an atomistic scale using in-situ high resolution transmission electron microcopy (in-situ HRTEM). The roles of dopants, crystallographic orientation and dynamic defects in the oxides’ functional properties will be elucidated in a comprehensive manner. The project outcome will thus constitute a great leap forward in developing TE devices that are efficient, inexpensive and environmentally friendly.
Nooshin Mortazavi Seyedeh (contact)
Post doc at Materials Microstructure
Swedish Research Council (VR)
Funding Chalmers participation during 2018–2021