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Optimization of TiO 2 nanoparticle mixed PEDOT-PSS counter electrodes for high efficiency dye sensitized solar cell
Author(s)
Maiaugree, Wasan
Pimanpang, Samuk
Towannang, Madsakorn
Saekow, Saman
Jarernboon, Wirat
Amornkitbamrung, Vittaya
Date Issued
September 1, 2012
Type
Conference Paper
Abstract
Poly(3,4-Ethylendioxythiophene)-Poly(Styrene Sulfonate) (PEDOT-PSS) mixed with titanium dioxide (TiO 2) nanoparticles was coated on conductive glass substrate by a doctor blading method and used as dye-sensitized solar cell (DSSC) counter electrodes. The energy conversion efficiency is significantly improved after TiO 2 nanoparticle incorporation. This improvement is attributed to an increase in counter electrode catalytic activity and a decrease in counter electrode charge transfer resistance. These phenomena were observed using Cyclic Voltammetry (CV) and Electrochemical Impedance Spectroscopy (EIS), respectively. The efficiency of polymer-TiO 2 based DSSCs varied with the ratio of small (∼ 25 nm) to large (∼ 100 nm) TiO 2 nanoparticles. The highest efficiency (∼ 8.49%) was obtained with a ratio of 30% large to 70% small (wt/wt) nanoparticles inTiO 2 electrodes. This efficiency is superior to that of Pt DSSC (∼ 7.50%). © 2011 Elsevier B.V.
Citation
Journal of Non Crystalline Solids, 358(17), 2489-2495, 2012