| Title |
The Enhancement of the Performance of Dye Sensitized Solar Cells Using Nb2O5-TiO2 Compound |
| Authors |
최석원(Choi, Seok-Won) ; 서현웅(Seo, Hyun-Woong) ; 손민규(Son, Min-Kyu) ; 김수경(Kim, Soo-Kyoung) ; 홍나영(Hong, Na-Yeong) ; 김희제(Kim, Hee-Je) ; 김종락(Kim, Jong-Rak) |
| DOI |
https://doi.org/10.5370/KIEE.2012.61.8.1153 |
| Keywords |
Dye-sensitized solar cell ; Electrical conductivity ; Nb_2O_5-TiO_2 compound ; Efficiency improvement |
| Abstract |
Niobium oxide (Nb_2O_5) has a strong chemical coherence and good electrical conductivity. Therefore, this material is helpful to enhance the performance of the dye sensitized solar cells (DSC) by improving the electron mobility. In this study, Nb_2O_5 was mixed with TiO_2 and this compound was applied to the DSC to improve its performance. As a result, the current density of the DSC using the Nb_2O_5-TiO_2 compound on the photoelectrode was increased, because the internal resistance concerned to the electron transfer in the photoelectrode of DSC was decreased. However, large amount of the Nb_2O_5 induces the decrease of the efficiency of the DSC because the surface area to attach dye molecules is decreased due to the large particle of Nb_2O_5. Therefore, it is important to optimize the mixture ratio of the Nb_2O_5-TiO_2 compound for maximizing the performance of the DSC. Finally, the most optimum performance of the DSC was shown in case of the Nb_2O_5 concentration of 10 wt% of the Nb_2O_5-TiO_2 compound. |