English   español  
Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/181239
Share/Impact:
Statistics
logo share SHARE logo core CORE   Add this article to your Mendeley library MendeleyBASE

Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL
Exportar a otros formatos:
Title

Improvement of Seebeck coefficient in as-grown Bi2Te3-ySey electrodeposited films by the addition of additives and bath optimization

AuthorsCaballero-Calero, Olga ; Borca Tasciuc, Diana-Andra; Martínez-Moro, Rut; Gorog, András; Mohner, Melissa; Borca Tasciuc, Theodorian; Martín-González, Marisol
KeywordsBismuth telluride selenide
Electrodeposition
Surfactant
Complexing agents
Seebeck coefficient
Issue Date10-Apr-2018
PublisherElsevier
CitationElectrochimica Acta 269: 490-498 (2018
AbstractBi2.0Te2.7Se0.3 is the most widely used thermoelectric n-type leg for large-scale cooling applications. However, as-grown electrodeposited Bi2Te3-ySey films typically have a Seebeck coefficient around a third of the bulk value, which sometimes can be improved with thermal annealings. In this work, we report as-grown Bi2Te3-ySey films having a Seebeck coefficient of approximately half the value of bulk without additional thermal treatments. All samples reported were deposited in baths containing no additives, sodium lignosulfonate (SLS), or both SLS plus ethylenediaminetetraacetic acid (EDTA) with a concentration of 1 M HNO3 (pH of 0 ± 0.1) and 0.6 M HNO3 (pH of 0.3 ± 0.1). For each scenario, the deposition was carried out at two different temperatures (0 °C and 5 °C). Seebeck values of −120 μV K−1 have been measured for as-grown films with an optimum morphology and stoichiometry (Bi2Te2.7Se0.3), which is ∼50% of the value obtained for this composition in bulk and the highest among as-grown electrochemically deposited films reported to date. These results are an incentive to revisit and further explore the chemistry behind the electrodeposition of bismuth telluride selenide films to improve the performance of electrodeposited thermoelectric films.
Publisher version (URL)https://doi.org/10.1016/j.electacta.2018.03.025
URIhttp://hdl.handle.net/10261/181239
DOI10.1016/j.electacta.2018.03.025
ISSN0013-4686
Appears in Collections:(IMN-CNM) Artículos
Files in This Item:
File Description SizeFormat 
accesoRestringido.pdf15,38 kBAdobe PDFThumbnail
View/Open
Show full item record
Review this work
 

Related articles:


WARNING: Items in Digital.CSIC are protected by copyright, with all rights reserved, unless otherwise indicated.