An effective thermal treatment strategy for thermoelectric performance enhancement in PANI/Te nanorod hybrid film

•Thermal treatment strategy is employed to optimize thermoelectric properties.•Thermal treatment effectively tunes the dopant volume and carrier concentration.•A 20% increment in power factor has been achieved in treated PANI/Te hybrid film. Doping is of key importance in enhancing the electrical tr...

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Bibliographic Details
Published in:Materials letters 2018-10, Vol.229, p.293-296
Main Authors: Wang, Yao, Yu, Chao, Liu, Guifen, Sheng, Ming, Deng, Yuan
Format: Article
Language:English
Subjects:
Carrier density
Conducting polymers
Electrical properties
Heat treatment
Materials science
Molecular structure
Nanorods
Optimization
Performance enhancement
Polyaniline
Polyanilines
Polymeric composites
Power factor
Temperature dependence
Thermoelectric materials
Thermoelectric properties
Transport properties
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Summary:•Thermal treatment strategy is employed to optimize thermoelectric properties.•Thermal treatment effectively tunes the dopant volume and carrier concentration.•A 20% increment in power factor has been achieved in treated PANI/Te hybrid film. Doping is of key importance in enhancing the electrical transport properties of conducting polymers. Recently, several strategies were employed to optimize the carrier concentration to maximize the power factor of conducting polymers based thermoelectric (TE) materials. Here, we adopted thermal treatment on polyaniline/Te nanorod hybrid films to study the temperature dependent changes in molecular structure, crystallinity, and electrical transport behaviors. The results unambiguously indicated that the carrier concentration would be effectively tuned, and the TE performance was further enhanced via thermal treatment solely. Finally, a 20% increment in power factor has been achieved for the hybrid film treated at 180 °C compared with as-prepared film. The study provides a facile route for optimizing TE properties of polymer-based hybrid materials.
ISSN:0167-577X
1873-4979
DOI:10.1016/j.matlet.2018.07.042