Triumphing over Charge Transfer Limitations of PEDOT Nanofiber Reduction Catalyst by 1,2-Ethanedithiol Doping for Quantum Dot Solar Cells
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Scholar |
Otros documentos de la autoría: Kim, Tea-Yon; Lee, Tae Kyung; Kim, Byung Su; Park, Seul Chan; Lee, Sungjin; Im, Seung Soon; Bisquert, Juan; Kang, Yong Soo
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http://dx.doi.org/10.1021/acsami.6b12536 |
Metadatos
Título
Triumphing over Charge Transfer Limitations of PEDOT Nanofiber Reduction Catalyst by 1,2-Ethanedithiol Doping for Quantum Dot Solar CellsAutoría
Fecha de publicación
2017Editor
American Chemical SocietyISSN
1944-8244; 1944-8252Tipo de documento
info:eu-repo/semantics/articleVersión de la editorial
http://pubs.acs.org/doi/abs/10.1021/acsami.6b12536Versión
info:eu-repo/semantics/publishedVersionPalabras clave / Materias
Resumen
Charge transfer between a conducting polymer-based counter electrode (CE) and a polysulfide (S2–/Sn2–) electrolyte mediator is a key limitation to improvements of solar energy conversion efficiency (ECE) in quantum- ... [+]
Charge transfer between a conducting polymer-based counter electrode (CE) and a polysulfide (S2–/Sn2–) electrolyte mediator is a key limitation to improvements of solar energy conversion efficiency (ECE) in quantum-dot-sensitized solar cells (QDSCs). In this paper, 1,2-ethanedithiol (EDT) was doped into nanofibrous poly(3,4-ethylenedioxythiophene) (PEDOT NF) to overcome the charge transfer limitation between PEDOT NF and S2–/Sn2–. EDT not only helps to reduce the aggregation and thus enhance the linearization of the PEDOT chains but also changes the molecular conformation of the PEDOT chains from a benzoid to a quinoid structure. EDT-doped PEDOT NF-based CEs showed almost 3.7 times higher conductivity, better electrocatalytic activity, and improved compatibility with S2–/Sn2– in an aqueous electrolyte. As a result, the charge transfer resistance between the polymer-based CE and the S2–/Sn2– electrolyte was significantly reduced, resulting in over 3% ECE in QDSCs, more than double that of a bare PEDOT NF-based CE. [-]
Publicado en
ACS applied materials & interfaces, 2017, vol. 9, no 2, p. 1877-1884.Proyecto de investigación
Korea Center for Artificial Photosynthesis (KCAP) / Number 2009-0093883Derechos de acceso
© American Chemical Society
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