Utilize este identificador para referenciar este registo:
https://hdl.handle.net/1822/71690
Título: | Enhanced 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 |
Outro(s) título(s): | Enhanced thermoelectric properties of Sb2Te3 and Bi2Te3 films for flexible thermal sensors |
Autor(es): | Vieira, E. M. F Figueira, Joana Pires, Ana L. Grilo, José Silva, Manuel Fernando Ribeiro Pereira, André M. Gonçalves, L. M. |
Palavras-chave: | Bismuth Telluride Antimony telluride Kapton® substrate Thermoelectric effect Flexible Thermal Sensor Kapton (R) substrate |
Data: | 5-Fev-2019 |
Editora: | Elsevier 1 |
Revista: | Journal of Alloys and Compounds |
Resumo(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. |
Tipo: | Artigo |
Descrição: | "Accepted Manuscript" |
URI: | https://hdl.handle.net/1822/71690 |
DOI: | 10.1016/j.jallcom.2018.09.324 |
ISSN: | 0925-8388 |
Versão da editora: | https://www.sciencedirect.com/science/article/pii/S0925838818335825 |
Arbitragem científica: | yes |
Acesso: | Acesso restrito UMinho |
Aparece nas coleções: | CMEMS - Artigos em revistas internacionais/Papers in international journals |
Ficheiros deste registo:
Ficheiro | Descrição | Tamanho | Formato | |
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vieira2019.pdf Acesso restrito! | 11,35 MB | Adobe PDF | Ver/Abrir |