Analyses of structurally modified quasi-solid-state electrolytes using electrochemical impedance spectroscopy for dye-sensitized solar cells
Article first published online: 29 JUL 2013
Copyright © 2013 Wiley Periodicals, Inc.
Journal of Applied Polymer Science
Volume 131, Issue 1, January 5, 2014
How to Cite
2014), Analyses of structurally modified quasi-solid-state electrolytes using electrochemical impedance spectroscopy for dye-sensitized solar cells. J. Appl. Polym. Sci., 131, 39739, doi: 10.1002/app.39739, , , , , and (
- Issue published online: 11 OCT 2013
- Article first published online: 29 JUL 2013
- Manuscript Accepted: 6 JUL 2013
- Manuscript Received: 26 FEB 2013
- properties and characterization;
- optical and photovoltaic applications;
- porous materials
Electrochemical properties of structurally modified quasi-solid-state electrolytes were examined using porous substrates (PSs). The PS was prepared into two categories by a phase inversion method with a brominated poly(phenylene oxide) (BPPO): the sponge and finger types. Effects of the humidification and cosolvent compositions on the morphology of the PS were analyzed by scanning electron microscopy. In all cases of the PSs, a higher VOC was observed of about 0.1 V than that of a liquid electrolyte owing to a suppressed back electron charge transfer. In addition, the PS prepared by the polymer solution of 1 : 4 : 1 (BPPO : N-methyl-2-pyrrolidone : butyl alcohol) with the humidification process showed better photovoltaic properties in terms of the current density and conversion efficiency owing to the appropriate combinations of pore size, tortuosity, and interconnectivity. Effects of the pore structures were intensively examined using electrochemical impedance spectroscopy. The impedance results revealed that large pores at the surface layers are advantageous for a lower RS and RTiO2. Meanwhile, the straight inner structure is beneficial for the facile I−/I3− diffusion, thus lowering RPt. © 2013 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2014, 131, 39739.