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dc.contributor.authorMengistie, Desalegn A.en_US
dc.contributor.authorIbrahem, Mohammed A.en_US
dc.contributor.authorWang, Pen-Chengen_US
dc.contributor.authorChu, Chih-Weien_US
dc.date.accessioned2014-12-08T15:35:30Z-
dc.date.available2014-12-08T15:35:30Z-
dc.date.issued2014-02-26en_US
dc.identifier.issn1944-8244en_US
dc.identifier.urihttp://dx.doi.org/10.1021/am405024den_US
dc.identifier.urihttp://hdl.handle.net/11536/24023-
dc.description.abstractWe proposed a facile film treatment with formic acid to enhance the conductivity of poly(3,4-ethylenedioxythiophene):poly(styrene sulfonate) (PEDOT:PSS) by 4 orders of magnitude. The effect of formic acid concentration on conductivity was investigated; conductivity increased fast with increasing concentration up to 10 M and then increased slightly, the highest conductivity being 2050 S cm(-1) using 26 M concentration. Formic acid treated PEDOT:PSS films also exhibited very high transmittances. The mechanism of conductivity enhancement was explored through SEM, AFM, and XPS. Formic acid with its high dielectric constant screens the charge between PEDOT and PSS bringing about phase separation between them. Increased carrier concentration, removal of PSS from the film, morphology, and conformation change with elongated and better connected PEDOT chains are the main mechanisms of conductivity enhancement. ITO-free polymer solar cells were also fabricated using PEDOT:PSS electrodes treated with different concentrations of formic acid and showed equal performance to that of ITO electrodes. The concentrated acid treatment did not impair the desirable film properties as well as stability and performance of the solar cells.en_US
dc.language.isoen_USen_US
dc.subjectITOen_US
dc.subjecttransparent electrodeen_US
dc.subjectPEDOT:PSSen_US
dc.subjectsolar cellen_US
dc.subjectformic aciden_US
dc.subjectconductivity enhancementen_US
dc.titleHighly Conductive PEDOT:PSS Treated with Formic Acid for ITO-Free Polymer Solar Cellsen_US
dc.typeArticleen_US
dc.identifier.doi10.1021/am405024den_US
dc.identifier.journalACS APPLIED MATERIALS & INTERFACESen_US
dc.citation.volume6en_US
dc.citation.issue4en_US
dc.citation.spage2290en_US
dc.citation.epage2297en_US
dc.contributor.department光電工程學系zh_TW
dc.contributor.departmentDepartment of Photonicsen_US
dc.identifier.wosnumberWOS:000332144600015-
dc.citation.woscount9-
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