Boosting thermoelectric power factor of free-standing Poly (3,4ethylenedioxythiophene):polystyrenesulphonate films by incorporation of bismuth antimony telluride nanostructures
IR@NPL: CSIR-National Physical Laboratory, New Delhi
View Archive Info| Field | Value | |
| Title |
Boosting thermoelectric power factor of free-standing Poly (3,4ethylenedioxythiophene):polystyrenesulphonate films by incorporation of bismuth antimony telluride nanostructures
|
|
| Creator |
Bharti, Meetu
Singh, Ajay Saini, Gajender Saha, Sudeshna Bohra, Anil Kaneko, Yuki Debnath, A. K. Muthe, K. P. Marumoto, Kazuhiro Aswal, D. K. Gadkari, S. C. |
|
| Subject |
Electrochemistry
Energy Fuels Materials Science Physical Chemistry/Chemical Physics |
|
| Description |
We demonstrate that introduction of p-type Bi0.5Sb1.5Te3 nanostructures into the polymer matrix not only causes highly adherent drop-casted films of PEDOT:PSS (on Kapton sheets) to attain a free-standing nature but also brings a significant improvement in their thermoelectric properties. Hall and ESR measurements of these hybrid films clearly show that both the carrier concentration and mobility can be varied with Bi0.5Sb1.5Te3 content. Whereas, results of X-ray diffraction, Raman and X-ray photoelectron spectroscopy confirm the enhancement in chain alignment and better connectivity among PEDOT:PSS and Bi0.5Sb1.5Te3 nanosheets; leading to remarkable enhancement of electrical conductivity. These hybrid films, due to energy filtering of charge carriers at the organic/inorganic interface, exhibit improvement in the Seebeck coefficient also. In fact, such a synergetic combination of improved electrical conductivity and Seebeck coefficient expertly tailors the power factor (from order of similar to 10(-4) to 8.3 mu W/mK(2)) over a vast range. The optimized films are tested for their power conversion ability and a single thermoelement based device exhibits an open circuit voltage similar to 536 mu V and current similar to 134 mu A for a temperature difference of 53 degrees C. Such an evolution of organic-inorganic hybrid films in a flexible, free-standing motif with enhanced thermoelectric properties exhibit good potential for recovering heat from the curved hot surfaces.
|
|
| Publisher |
Elsevier
|
|
| Date |
2019-09-30
|
|
| Type |
Article
PeerReviewed |
|
| Format |
application/pdf
|
|
| Identifier |
http://npl.csircentral.net/4118/1/Boosting%20thermoelectric%20power%20factor.pdf
Bharti, Meetu and Singh, Ajay and Saini, Gajender and Saha, Sudeshna and Bohra, Anil and Kaneko, Yuki and Debnath, A. K. and Muthe, K. P. and Marumoto, Kazuhiro and Aswal, D. K. and Gadkari, S. C. (2019) Boosting thermoelectric power factor of free-standing Poly (3,4ethylenedioxythiophene):polystyrenesulphonate films by incorporation of bismuth antimony telluride nanostructures. Journal of Power Sources, 435. pp. 226758-226769. ISSN 0378-7753 |
|
| Relation |
http://npl.csircentral.net/4118/
|
|