Chemically Exfoliated SnSe Nanosheets and Their SnSe/Poly(3,4-ethylenedioxythiophene):Poly(styrenesulfonate) Composite Films for Polymer Based Thermoelectric Applications
- Authors
- Ju, Hyun; Kim, Jooheon
- Issue Date
- Jun-2016
- Publisher
- AMER CHEMICAL SOC
- Keywords
- thermoelectric; tin selenide; nanosheet; exfoliation; poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate)
- Citation
- ACS NANO, v.10, no.6, pp 5730 - 5739
- Pages
- 10
- Journal Title
- ACS NANO
- Volume
- 10
- Number
- 6
- Start Page
- 5730
- End Page
- 5739
- URI
- https://scholarworks.bwise.kr/cau/handle/2019.sw.cau/6905
- DOI
- 10.1021/acsnano.5b07355
- ISSN
- 1936-0851
1936-086X
- Abstract
- Tin selenide (SnSe) nanosheets (NSs) are prepared by hydrothermal lithium-intercalation and a subsequent exfoliation process from a SnSe ingot. Conducting polymer poly(3,4-ethylenedioxythiohene):poly(styrenesulfonate) (PEDOT:PSS)-based thermoelectric composites are fabricated with varying SnSe NSs content, and the thermoelectric properties of the composites are examined at 300 K. The exfoliated SnSe particles show thin two-dimensional sheet-like structures that are evenly distributed into the PEDOT:PSS matrix. The significantly enhanced power factor (S-2.sigma of the SnSe NS/PEDOT:PSS composites with increasing SnSe NSs content can be explained by the potential difference at the interface between the SnSe and PEDOT:PSS. The fabricated SnSe NS/PEDOT:PSS composites show a maximum figure of merit (ZT) of 0.32 at a SnSe NSs loading of 20 wt %. The mixing of inorganic nanoparticles with the conducting polymer matrix forms products with extremely low thermal conductivities, which is a promising strategy for the realization of polymer based efficient thermoelectric applications.
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