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Article: Simple Layer-by-Layer Assembly Method for Simultaneously Enhanced Electrical Conductivity and Thermopower of PEDOT:PSS/ ce-MoS2 Heterostructure Films

TitleSimple Layer-by-Layer Assembly Method for Simultaneously Enhanced Electrical Conductivity and Thermopower of PEDOT:PSS/ ce-MoS<inf>2</inf> Heterostructure Films
Authors
Keywordsheterostructure
layer-by-layer assembly
MoS 2
PEDOT:PSS
thermoelectric thin film
Issue Date2018
Citation
ACS Applied Energy Materials, 2018, v. 1, n. 7, p. 3123-3133 How to Cite?
AbstractThe organic/inorganic composites are considered as a promising strategy to gain high thermoelectric (TE) performance. Although many efforts have been focused on composites, complicated methods are real hindrance to the development of TE materials. Here, we demonstrate a potential TE thin film comprising highly conductive poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) and chemically exfoliated MoS2 (ce-MoS2) nanosheets by layer-by-layer (LbL) assembly method. This work achieves the effective integration of composite, treatment, and electron transfer based on the advantages of PEDOT:PSS and ce-MoS2. On the one hand, the negative charged ce-MoS2 nanosheets facilitate the formation of heterostructure TE films with positive charged PEDOT and reduce the oxidation level of PEDOT, which would favor an enhanced thermopower (21.9 μV K-1). On the other hand, the simultaneous enhancement in the electrical conductivity (867 S cm-1) of PEDOT:PSS/ce-MoS2 composite film is caused by dimethyl sulfoxide (DMSO) worked as the dispersion of ce-MoS2, which corresponds to the removal of the excess nonconductive PSS and the molecular conformation arrangement of PEDOT:PSS. This LbL assembly method incorporating electron-rich ce-MoS2 and DMSO has been confirmed to be an effective strategy to yield a simultaneous enhancement of electrical conductivity and thermopower. The optimized power factor is achieved to be 41.6 μW m-1 K-2 at the layer number of 4, which surpass that of the single-layer PEDOT:PSS film by a factor of 5. This work may provide a fundamental understanding of and design principles on how to build PEDOT:PSS-based composite films with highly enhanced TE performance, which can be potentially used in TE energy-harvesting systems.
Persistent Identifierhttp://hdl.handle.net/10722/335823
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorWang, Xiaodong-
dc.contributor.authorMeng, Fanling-
dc.contributor.authorJiang, Qinglin-
dc.contributor.authorZhou, Weiqiang-
dc.contributor.authorJiang, Fengxing-
dc.contributor.authorWang, Tongzhou-
dc.contributor.authorLi, Xia-
dc.contributor.authorLi, Si-
dc.contributor.authorLin, Yuancheng-
dc.contributor.authorXu, Jingkun-
dc.date.accessioned2023-12-28T08:49:01Z-
dc.date.available2023-12-28T08:49:01Z-
dc.date.issued2018-
dc.identifier.citationACS Applied Energy Materials, 2018, v. 1, n. 7, p. 3123-3133-
dc.identifier.urihttp://hdl.handle.net/10722/335823-
dc.description.abstractThe organic/inorganic composites are considered as a promising strategy to gain high thermoelectric (TE) performance. Although many efforts have been focused on composites, complicated methods are real hindrance to the development of TE materials. Here, we demonstrate a potential TE thin film comprising highly conductive poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) and chemically exfoliated MoS2 (ce-MoS2) nanosheets by layer-by-layer (LbL) assembly method. This work achieves the effective integration of composite, treatment, and electron transfer based on the advantages of PEDOT:PSS and ce-MoS2. On the one hand, the negative charged ce-MoS2 nanosheets facilitate the formation of heterostructure TE films with positive charged PEDOT and reduce the oxidation level of PEDOT, which would favor an enhanced thermopower (21.9 μV K-1). On the other hand, the simultaneous enhancement in the electrical conductivity (867 S cm-1) of PEDOT:PSS/ce-MoS2 composite film is caused by dimethyl sulfoxide (DMSO) worked as the dispersion of ce-MoS2, which corresponds to the removal of the excess nonconductive PSS and the molecular conformation arrangement of PEDOT:PSS. This LbL assembly method incorporating electron-rich ce-MoS2 and DMSO has been confirmed to be an effective strategy to yield a simultaneous enhancement of electrical conductivity and thermopower. The optimized power factor is achieved to be 41.6 μW m-1 K-2 at the layer number of 4, which surpass that of the single-layer PEDOT:PSS film by a factor of 5. This work may provide a fundamental understanding of and design principles on how to build PEDOT:PSS-based composite films with highly enhanced TE performance, which can be potentially used in TE energy-harvesting systems.-
dc.languageeng-
dc.relation.ispartofACS Applied Energy Materials-
dc.subjectheterostructure-
dc.subjectlayer-by-layer assembly-
dc.subjectMoS 2-
dc.subjectPEDOT:PSS-
dc.subjectthermoelectric thin film-
dc.titleSimple Layer-by-Layer Assembly Method for Simultaneously Enhanced Electrical Conductivity and Thermopower of PEDOT:PSS/ ce-MoS<inf>2</inf> Heterostructure Films-
dc.typeArticle-
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1021/acsaem.8b00315-
dc.identifier.scopuseid_2-s2.0-85052561878-
dc.identifier.volume1-
dc.identifier.issue7-
dc.identifier.spage3123-
dc.identifier.epage3133-
dc.identifier.eissn2574-0962-
dc.identifier.isiWOS:000458706000017-

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