| 초록 |
Colloidal quantum dots (QDs) have been considered as one of the most promising light-absorbing materials in photoelectrochemistry due to their unique characteristics, such as relatively low cost, band gap tunability, and potential for multiple exciton generation. One of the main applications about QDs is quantum dot-sensitized solar cells (QDSCs), which has received interests as one of the promising next-generation photovoltaic devices. However, many QDSCs exhibited relatively low efficiency mainly due to the insufficient loadings of QDs on the mesoporous semiconductor. In this work, we introduced an electrophoretic deposition method for the effective adsorption of colloidal QDs on the surface of mesoporous TiO2 film, instead of the typical method, i.e., dipping method. This change increased the adsorption amount of QDs by about 103% compared to the control sample and showed improvements in photocurrent and power conversion efficiency. These results are expected to be utilized for realizing a high-efficiency quantum dot sensitized solar cell. |
