|Title:||A novel polymer gel electrolyte for highly efficient dye-sensitized solar cells||Authors:||Dong, R.-X.
|Issue Date:||2013||Journal Volume:||1||Journal Issue:||29||Start page/Pages:||8471-8478||Source:||Journal of Materials Chemistry A||Abstract:||
A structurally interconnected block copolymer was facilely prepared by the oligomerization of poly(oxyethylene)-segmented diamine and 4,4′- oxydiphthalic anhydride, followed by a late-stage curing to generate amide-imide cross-linked gels. The gel structure, with multiple functionalities including poly(oxyethylene) segments, amido-acid linkers, amine termini, and amide cross-linker was characterized by Fourier transform infrared spectroscopy. The gel-like copolymer was used to absorb a liquid electrolyte; formation of 3D interconnected nanochannels, as could be observed by field emission scanning electronic microscopy has confirmed this absorption of the liquid electrolyte by the copolymer. This elastomeric copolymer was used as the matrix of a polymer gel electrolyte (PGE) for a dye-sensitized solar cell (DSSC), which shows extremely high photovoltaic performance (soaking for 1 h in the electrolyte). In particular, the PGE containing 76.8 wt% of the liquid electrolyte renders a power conversion efficiency of 9.48% for its DSSC, with a short-circuit photocurrent density of 19.50 mA cm-2, an open-circuit voltage of 0.76 V, and a fill factor of 0.64. The outstanding performance of the gel-state DSSC, superior to that (8.84%) of the DSSC with the liquid electrolyte, is mainly ascribed to the suppression of the back electron transfer through the PGE. Electrochemical impedance spectra, and dark current measurements were used to substantiate the explanations of the photovoltaic parameters. © 2013 The Royal Society of Chemistry.
|DOI:||10.1039/c3ta11331k||metadata.dc.subject.other:||Dye-Sensitized solar cell; Dye-sensitized solar cells; Electrochemical impedance spectra; Field emission scanning electronic microscopy; Oxydiphthalic anhydrides; Photovoltaic performance; Power conversion efficiencies; Short-circuit photocurrent densities; Amides; Copolymers; Electrolytes; Fourier transform infrared spectroscopy; Open circuit voltage; Photoelectrochemical cells; Polyethylene oxides; Solar cells; Liquids
|Appears in Collections:||化學工程學系|
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.