| 초록 |
TiO2-based dye sensitizing solar cells (DSSCs) offer significant economic and environmental advantages over conventional photovoltaic devices because of their relatively inexpensive manufacturing costs and low toxicity. Since the application of dye-sensitized solar cells in solar energy conversion was first reported in 1991, the increase in conversion efficiency has been primarily due to improvements in the TiO2 nanoparticles based photoelectrode. However, inefficient carrier transport in the photoelectrode such as backward electron transfer still limits DSSCs from achieving higher efficiencies. Surface modification of TiO2 nanoparticles is one of promising strategies to improving energy conversion efficiency. We introduce various surface modification methods such as nanoporous oxide coating and acid treatment, which facilitates dye adsorption and retards back electron transfer, thereby enhancing energy conversion efficiency of DSSCs. |
