Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/91739
Type: Artigo de periódico
Title: Electrochemical And Structural Characterization Of Polymer Gel Electrolytes Based On A Peo Copolymer And An Imidazolium-based Ionic Liquid For Dye-sensitized Solar Cells
Author: Freitas F.S.
Freitas J.N.D.
Ito B.I.
Paoli M.-A.D.
Nogueira A.F.
Abstract: Polymer electrolytes based on mixtures of poly(ethylene oxide-co-propylene oxide) and 1-methyl-3-propyl-imidazolium iodide (MPII) were investigated, aiming at their application in dye-sensitized solar cells (DSSC). The interactions between the copolymer and the ionic liquid were analyzed by infrared spectroscopy and 1H NMR. The results show interactions between the ether oxygen in the polymer and the hydrogen in the imidazolium cations. The ionic conductivities, electrochemical behaviors, and thermal properties of the electrolytes containing different concentrations of MPII were investigated. The electrolyte containing 70 wt % MPII presented the highest ionic conductivity (2.4 × 10 -3 S cm -1) and a diffusion coefficient of 1.9 × 10 -7 cm 2 s -1. The influence of LiI addition to the electrolytes containing different concentrations of MPII was also investigated. The DSSC assembled with the electrolyte containing 70 wt % MPII showed an efficiency of 3.84% at 100 mW cm -2. The stability of the devices for a period of 30 days was also evaluated using sealed cells. The devices assembled with the electrolyte containing less ionic liquid showed to be more stable. © 2009 American Chemical Society.
Editor: 
Rights: fechado
Identifier DOI: 10.1021/am900596x
Address: http://www.scopus.com/inward/record.url?eid=2-s2.0-77956437809&partnerID=40&md5=b200de0eb996c7e73d1a61cc84b4b2f8
Date Issue: 2009
Appears in Collections:Unicamp - Artigos e Outros Documentos

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