Study on Relationship between a TiO2 Photo-Electrode Fabrication Conditions and Efficiency of a Dye-sensitized Solar Cells

산화티탄 광전극 제작조건과 염료감응 태양전지 효율과의 상관관계 연구

In this work, the effect of addition of acetylacetone on microstructure and quality of nanoporous $TiO_2$ photo-electrodes was studied in dye-sensitized solar cells (DSCs) and structure and electrical properties of fabricated cells were investigated. From the results, the DSCs fabricated with acetyl acetone showed highest photovoltaic performances. This behavior may be attributed to paste agglomeration decrease and interconnection and bonding improvement between $TiO_2$ particles. Furthermore, the most favorable dye absorption time results to be 10h: exceeding this time a decrease in efficiency is observed despite the increasing amount of dye absorption. The $TiO_2$ photo-electrode prepared under the conditions of acetylacetone ratio of 15% and dye absorption time of 10hr showed the better photovoltaic performance ($J_{sc}=12.48mA/cm^2$, $V_{oc}=0.69V$, ff=0.68, ${\eta}=5.86%$).