Please use this identifier to cite or link to this item: https://hdl.handle.net/1822/71690

TitleEnhanced thermoelectric properties of Sb<inf>2</inf>Te<inf>3</inf> and Bi<inf>2</inf>Te<inf>3</inf> films for flexible thermal sensors
Other titlesEnhanced thermoelectric properties of Sb2Te3 and Bi2Te3 films for flexible thermal sensors
Author(s)Vieira, E. M. F
Figueira, Joana
Pires, Ana L.
Grilo, José
Silva, Manuel Fernando Ribeiro
Pereira, André M.
Gonçalves, L. M.
KeywordsBismuth Telluride
Antimony telluride
Kapton® substrate
Thermoelectric effect
Flexible Thermal Sensor
Kapton (R) substrate
Issue date5-Feb-2019
PublisherElsevier
JournalJournal of Alloys and Compounds
Abstract(s)Improved thermoelectric properties of p-Sb2Te3 and n-Bi2Te3 films deposited by thermal co-evaporation at 503 K and 543 K, respectively, are reported, by using two types of substrate (borosilicate glass and 25 μm - Kapton® polyimide). Seebeck coefficients of 194 μV K−1 and - 233 μV K−1 and electrical conductivities of 3.2 × 104 (Ω m)−1 and 5.0 × 104 (Ω m)−1, lead to optimized power factors of 1.2 × 10−3 W K−2 m−1 and 2.7 × 10−3 W K−2 m−1, measured at 298 K, for flexible Sb2Te3 and Bi2Te3 films, respectively. The power factor value increases until a maximum of 2.3 × 10−3 W m−1 K−2 for the p-type film, and to 5.9 × 10−3 W m−1 K−2 for the n-type film, at 373 K, respectively. An improvement of more than two times on the power factor value is observed when compared with the actual state-of-art for flexible Sb2Te3 and Bi2Te3 films, at room temperature, with thickness below 1 μm. A flexible thermopile sensor based on p - n films is presented, into possible thermal sensing. The thermoelectric device shows a responsivity of 0.05 V W−1 and a specific detectivity of 1.6 × 107 cm √Hz W−1.
TypeArticle
Description"Accepted Manuscript"
URIhttps://hdl.handle.net/1822/71690
DOI10.1016/j.jallcom.2018.09.324
ISSN0925-8388
Publisher versionhttps://www.sciencedirect.com/science/article/pii/S0925838818335825
Peer-Reviewedyes
AccessRestricted access (UMinho)
Appears in Collections:CMEMS - Artigos em revistas internacionais/Papers in international journals

Files in This Item:
File Description SizeFormat 
vieira2019.pdf
  Restricted access
11,35 MBAdobe PDFView/Open

Partilhe no FacebookPartilhe no TwitterPartilhe no DeliciousPartilhe no LinkedInPartilhe no DiggAdicionar ao Google BookmarksPartilhe no MySpacePartilhe no Orkut
Exporte no formato BibTex mendeley Exporte no formato Endnote Adicione ao seu ORCID