Bi2Te3 and Sb2Te3 Thin Films with Enhanced Thermoelectric Properties for Flexible Thermal Sensors

• Author(s): Vieira, Eliana Maria Fernandes ; Figueira, Joana ; Pires, Ana Lucia ; Grilo, José ; Silva, Manuel Fernando Ribeiro ; Pereira, André Miguel ; Gonçalves, L. M.
• Date: 2018
• Persistent ID: https://hdl.handle.net/1822/60885
• Origin: RepositóriUM - Universidade do Minho
• Document Type: Conference paper
• Language: English
• Contributor(s): Universidade do Minho

Description

The influence of substrate type in boosting thermoelectric properties of co-evaporated Bi2Te3 and Sb2Te3 films (with 400 nm-thick) is here reported. Optimized power factor values are 2.7 × 10⁻³ W K⁻² m⁻¹ and 1.4 × 10⁻³ W K⁻² m⁻¹ for flexible Bi2Te3 and Sb2Te3 films, respectively. This is an important result as it is at least 2 times higher than the power factor found in the literature for flexible Bi2Te3 and Sb2Te3 films. A flexible infrared thermopile sensor was developed with high detectivity (2.50 × 10⁷ cm √HzW⁻¹).