| Title |
Efficiency Improvement of Metal-Mesh Electrode Type Photoelectrochemical Cells by Oxides Layer Coatings |
| Authors |
한치환(Han, Chi-Hwan) ; 박선희(Park, Seon-Hee) ; 성열문(Sung, Youl-Moon) |
| DOI |
https://doi.org/10.5370/KIEE.2011.60.3.584 |
| Keywords |
Metal electrode ; Photo-electrochemical cells ; SnO_2 ; TiO_2 ; Sol-gel method ; Back transfer elelctron |
| Abstract |
In this work, the TiO_2 and SnO_2 thin films as blocking layers were coated directly onto the metal-mesh electrode surface to prevent unnecessary inflow of back-transfer electrons from the electrolyte (I^-/I_3^-) to the metal-mesh electrode. The DSCs were fabricated with working electrode of SUS mesh coated with blocking TiO_2 and SnO_2 layers, dye-attached mesoporous TiO_2 film, gel electrolyte and counter electrode of Pt-deposited F:SnO_2. From the experimental result, it was ascertained that the efficiency of metal electrode coated with TiO_2 by Dip-coating was superior to that of metal electrode coated with SnO_2 by Dip-coating and screen printing with the results of experiments. The photo-current conversion efficiency of the cell obtained from optimum fabrication condition was 3% (V_{oc}=0.61V, J_{sc}=11.64 mA/cm^2, ff=0.64) under AM1.5, 100 mW/cm^2 illumination. |