Oxide thermoelectrics - materials, junctions and modules: Thermoelectric properties and direct junctions of p- and n-type iron tungstates
Appears in the following Collection
- Kjemisk institutt 
AbstractThermoelectric materials are able to directly convert heat into electricity, which makes them predestined candidates for the recuperation of waste heat and contributing to a more efficient energy economy. They hold enormous potential for energy generation, since all thermodynamic processes lose a major portion of their energy in the form of waste heat. However, conventional thermoelectric materials are often toxic, scarce and/or expensive, and show limited high temperature stability, which currently limits their relevance for large-scale applications. Recently, oxide thermoelectric materials, composed of abundant elements have attracted increased interest, as they offer a cheaper, environmental-friendly, and high-temperature stable alternative. They are usually discovered and researched individually, and only later combined to a p-n pair in a module, which often leads to complications, like thermal mismatch or reactions. In this work the approach was taken to design a compatible pair of new thermoelectric oxides that preclude complications in advance. This novel approach is demonstrated on a model pair of iron tungstates, which show promising thermoelectric properties and an exceptional band alignment, which could prove to be key properties for future thermoelectrics.
List of papers
|Paper I: Defects and polaronic electron transport in Fe2WO6. Raphael Schuler, Truls Norby, and Helmer Fjellvåg, Physical Chemistry Chemical Physics, 2020, 22, 15541-15548. doi: 10.1039/d0cp01588a. The article is included in the thesis. Also available at: https://doi.org/10.1039/d0cp01588a|
|Paper II: Near-broken gap alignment between FeWO4 and Fe2WO6 for ohmic p-n junction thermoelectrics. Raphael Schuler, Federico Bianchini, Truls Norby, and Helmer Fjellvåg. ACS Applied Materials & Interfaces 2021. doi: 10.1021/acsami.0c19341. The article is included in the thesis. Also available at: https://doi.org/10.1021/acsami.0c19341|
|Paper III: Versatile 4-leg thermoelectric module test setup adapted to a commercial sample holder system for high temperatures and controlled atmospheres. Raphael Schuler, Reshma K. Madathil, and Truls Norby (Submitted to Journal of Scientific Instruments). To be published. The paper is not available in DUO awaiting publishing.|