| 초록 |
TiO2-based dye sensitized solar cell (DSC) has shown an elevated energy conversion efficiency as high as 11%, which can be considered a result of elaboration of every component of DSC including the best formulated semiconducting electrode, consisting of simple 15-20nm nanoparticles. Such a result, however, is also suggesting that some alternative electrodes other than simple particulate one are now required to make a breakthrough to get higher efficiency than 11%.. In this aspect, we have tried to introduce nanostructures to metal oxide electrodes, ZnO and SnO2 as well as TiO2 and monitored the consequences in view of photovoltaic performances. We report here on the nanostructured ZnO electrodes with controlled water content which showed a greatly increased efficiency 6.0%. Preparation of ZnO electrodes and their PV properties including I-V behavior, ICPE and impedance response will be discussed along with their nanostructures. Also, influences of introduction of mesopores into the SnO2 and TiO2 electrodes on the PV properties will be briefly presented in view of enhanced diffusion of electrolytes within the semiconducting electrode matrices. |
