2013 Fiscal Year Annual Research Report
Studies on the thermoelectric properties of PEDOT:PSS
| Project/Area Number |
25888025
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| Research Category |
Grant-in-Aid for Research Activity Start-up
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| Research Institution | National Institute of Advanced Industrial Science and Technology |
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Principal Investigator |
衛 慶碩 独立行政法人産業技術総合研究所, ナノシステム研究部門, 研究員 (30709564)
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| Project Period (FY) |
2013-08-30 – 2015-03-31
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| Keywords | Anisotropic / Organic Semiconductors / Thermal Conductivity / Seebeck Coefficient / Electrical Conductivity |
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| Research Abstract |
In this study, we have developed general approaches to study the anisotropic thermoelectric properties of conducting polymer films. The Seebeck coefficient, electrical conductivity and thermal conductivity at both through-plane and in-plane directions can be measured with high accuracy. The bench-mark conducting polymer PEDOT:PSS was used as an example here. This study suggested PEDOT:PSS films have an anisotropic carrier transport properties and thermal conductivity. The anisotropic carrier transport properties can be explained by the lamellar structure of the PEDOT:PSS films. The anisotropic thermal conductivity could be attributed to the lattice contribution from PSS since the polymer chain is oriented along the substrate.
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| Current Status of Research Progress |
Current Status of Research Progress
2: Research has progressed on the whole more than it was originally planned.
Reason
The study on the through-plane Seebeck coefficient and through-plane four probe conductivity measurement take some time. The reliable set-up is modified for several times.
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| Strategy for Future Research Activity |
We will try to further improve the thermometric properties of conducting polymers based our current results. One straight forward approach is to reduce the in-plane thermal conductivity by using a small molecule dopant.Another possible approach is trying to achieve optimized power factor through the controlling of PEDOT crystal orientations by controlling the film formation conditions.
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