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dc.contributor.authorMengistie, Desalegn A.en_US
dc.contributor.authorChen, Chang-Hsiaoen_US
dc.contributor.authorBoopathi, Karunakara M.en_US
dc.contributor.authorPranoto, Ferry W.en_US
dc.contributor.authorLi, Lain-Jongen_US
dc.contributor.authorChu, Chih-Weien_US
dc.date.accessioned2015-07-21T08:28:46Z-
dc.date.available2015-07-21T08:28:46Z-
dc.date.issued2015-01-14en_US
dc.identifier.issn1944-8244en_US
dc.identifier.urihttp://dx.doi.org/10.1021/am507032een_US
dc.identifier.urihttp://hdl.handle.net/11536/124381-
dc.description.abstractFor inorganic thermoelectric materials, Seebeck coefficient and electrical conductivity are interdependent, and hence optimization of thermoelectric performance is challenging. In this work we show that thermoelectric performance of PEDOT:PSS can be enhanced by greatly improving its electrical conductivity in contrast to inorganic thermoelectric materials. Free-standing flexible and smooth PEDOT:PSS bulky papers were prepared using vacuum-assisted filtration. The electrical conductivity was enhanced to 640, 800, 1300, and 1900 S cm(-1) by treating PEDOT:PSS with ethylene glycol, polyethylene glycol, methanol, and formic acid, respectively. The Seebeck coefficient did not show significant variation with the tremendous conductivity enhancement being 21.4 and 20.6 mu V K-1 for ethylene glycol- and formic acid-treated papers, respectively. This is because secondary dopants, which increase electrical conductivity, do not change oxidation level of PEDOT. A maximum power factor of 80.6 mu W m(-1) K-2 was shown for formic acid-treated samples, while it was only 29.3 mu W m(-1) K-2 for ethylene glycol treatment. Coupled with intrinsically low thermal conductivity of PEDOT:PSS, ZT approximate to 0.32 was measured at room temperature using Harman method. We investigated the reasons behind the greatly enhanced thermoelectric performance.en_US
dc.language.isoen_USen_US
dc.subjectPEDOT:PSSen_US
dc.subjectconductivity enhancementen_US
dc.subjectflexible thermoelectricsen_US
dc.subjectSeebeck coefficienten_US
dc.subjectpower factoren_US
dc.subjectconductive polymeren_US
dc.titleEnhanced Thermoelectric Performance of PEDOT:PSS Flexible Bulky Papers by Treatment with Secondary Dopantsen_US
dc.typeArticleen_US
dc.identifier.doi10.1021/am507032een_US
dc.identifier.journalACS APPLIED MATERIALS & INTERFACESen_US
dc.citation.spage94en_US
dc.citation.epage100en_US
dc.contributor.department光電工程學系zh_TW
dc.contributor.departmentDepartment of Photonicsen_US
dc.identifier.wosnumberWOS:000348085200013en_US
dc.citation.woscount1en_US
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