Proceedings of 6th International Conference on Hybrid and Organic Photovoltaics (HOPV14)
Publication date: 1st March 2014
In this work, we present the dye-sensitized solar cells (DSSC) containing the screen-printed conducting polymer based counter electrode. The application of conductive polymers as a counter electrode in DSSC has been already reported during the last years.1-4 However, the DSSC with printed counter electrodes have not been extensively investigated yet. The screen-printing is a large area printing technique and therefore could potentially enable the production of DSSC in large scales on flexible substrates. The DSSC counter electrode was prepared from poly(3,4-ethylenedioxythiophene) polystyrene sulfonate (PEDOT:PSS) dispersion (Clevios P), which was modified by means of additives to enable the printability (solvents and binder) and to increase the conductivity of the final PEDOT:PSS film. Three different concentrations of the binder were used to change viscosity and conductivity of the prepared PEDOT:PSS layer. The prepared three formulations were compared with the commercial screen printable formulation (Clevios S V3) and Platinum standard. The final power conversion efficiencies (PCEs) under standard 100 mW/cm2 AM 1.5 illumination were ranging from 2.4 to 2.9 %, whereas the PCE of the Clevios SV3 of 2.7 % was obtained. The influence of the binder concentration on the layer morphology, electrochemical activity of counter electrode, as well as cell performance are discussed. Based on these results, the application of the screen printing, as a method for the fabrication of low-cost DSSC with polymer counter electrode can be suggested.
[1] Ahmad, S.; Yum, J.; Xianxi, Z.; Grätzel, M.; Butt, H.; Nazeeruddin, M. Dye-sensitized solar cells based on poly(3,4-ethylenedioxythiophene) counter electrode derived from ionic liquids. J. Mater. Chem. 2010, 20, 1654-1658. [2] Muto, T.; Ikegami, M.; Kabayashi, K.; Miyasaka, T. Conductive polymer-based mesoscopic counter electrode for plastic dye-sensitized solar cells. Chem. Lett. 2007, 36, 804-805. [3] Fan, B.; Mei, X.; Sun, K.; Ouyang, J. Conducting polymer/carbon nanotube composite as counter electrode of dye-sensitized solar cells. Appl. Phys. Lett. 2008, 93, 143103 [4] Hong, W.; Xu, Y.; Lu, G.; Li, C.; Shi, G. Transparent graphene/PEDOT:PSS composite films as counter electrodes of dye snesitized solar cells. Electrochemistry Communications 2008, 10, 1555-1558.