2024-03-28T11:17:02Zhttp://digital.csic.es/dspace-oai/requestoai:digital.csic.es:10261/1885212022-12-14T11:50:02Zcom_10261_89com_10261_3col_10261_342
2019-08-20T06:42:43Z
urn:hdl:10261/188521
Thermoelectric functionality of Ca3Co4O9 epitaxial thin films on yttria-stabilized zirconia crystalline substrate
Pérez-Rivero, Armando
Cabero, M.
Varela, M.
Ramírez-Jiménez, Rafael
Mompean, F. J.
Santamaría, Jacobo
Martínez, J. L.
Prieto, Carlos
Ministerio de Economía y Competitividad (España)
Comunidad de Madrid
Fundación BBVA
Oxide thin films
Thermoelectric materials
Layered cobaltite CaCoO is one of the most interesting materials for energy conversion due to its excellent thermoelectric properties and stability at high temperatures. However, the best performance of this material is achieved for single crystals and epitaxial films. Within this framework, an important role is played by the substrate, which should promote epitaxial growth and that should have suitable thermal properties for its integration in devices. In this work, we report on the preparation of epitaxial thin films of CaCoO by sputtering using low cost ceramic target on cubic yttria-stabilized zirconia (YSZ(100)) that is typically the standard for low thermal conductivity material and on hexagonal sapphire (AlO(0001)). The quality of the epitaxial films and its microstructure has been studied to explain the thermoelectric properties obtained for both substrates. YSZ(100) substrate provides CaCoO films with enhanced Seebeck coefficient and AlO(0001) allows improved conductive CaCoO films that finally, at 200 °C, results in a substrate-modified Z′T figure of merit one order of magnitude higher for CaCoO on YSZ(100) than on AlO(0001) substrate.
2019-08-20T06:42:43Z
2019-08-20T06:42:43Z
2017-07-05
2019-08-20T06:42:43Z
artículo
Journal of Alloys and Compounds 710: 151-158 (2017)
http://hdl.handle.net/10261/188521
10.1016/j.jallcom.2017.03.191
http://dx.doi.org/10.13039/501100003329
http://dx.doi.org/10.13039/100007406
http://dx.doi.org/10.13039/100012818
eng
https://doi.org/10.1016/j.jallcom.2017.03.191
Sí
S2013/MIT-2740/PHAMA_2.0-CM
closedAccess
Elsevier