DSC碳计数器采用丝网印刷电极的制作方法.pdf

Pure Appl. Chem., Vol. 83, No. 11, pp. 2089–2106, 2011. doi:10.1351/PAC-CON-11-04-03 © 2011 IUPAC, Publication date (Web): 24 August 2011 Porous carbon layers for counter electrodes in dye-sensitized solar cells: Recent advances and a new screen-printing method* Seigo Ito‡ and Yuuki Mikami Department of Electrical Engineering and Computer Sciences, Graduate School of Engineering, University of Hyogo, 2167 Shosha, Himeji, Hyogo 671-2280, Japan Abstract : We review the recent literature on carbon catalyst layers for dye-sensitized solar cells (DSCs), and then report an improved fabrication method for screen-printed carbon counter electrodes. The carbon-printing ink was prepared by mixing carbon black, TiO2 nanoparticles, α-terpineol, and ethyl cellulose using a mortar, an ultrasonic homogenizer, and a rotary evaporator. Scanning electron microscopy (SEM) showed that the resulting screen- printed carbon layers were flatter and smoother at nano- and micro-scales than a carbon layer prepared using water-based ink. The photovoltaic performance of the screen-printed catalyst layers was similar to the photoenergy conversion of platinum counter electrodes. The high- est cell efficiency with a carbon counter electrode was 7.11 % at a light intensity of 100 mW −2 cm . Keywords: carbon nanotubes; dye-sensitized solar cells; platinum; porous carbon; scanning electron microscopy (SEM); screen printing. INTRODUCTION AND OVERVIEW Dye-sensitized solar cells (DSCs), which can be fabricated using a non-vacuum printing system, have attracted academic and industrial attention because of the demand for cost-effective, renewable energy sources. The basic DSC structure is: transp