| 초록 |
Photovoltaics such as dye-sensitized solar cells (DSSCs), organic-inorganic solar cells, and perovskite solar cells are one of the most promising renewable energy sources. Especially, DSSCs have several advantages such as high energy conversion efficiency, low cost, and a simple process. DSSCs consist of mesoporous TiO2 nanoparticle (NP) films, sensitizers, electrolyte, and a counter electrode. Generally DSSCs are fabricated with mesoporous TiO2 NP films that have high surface areas to adsorb sensitizers. However, mesoporous TiO2 NP films have several limitation such as grain boundary and trapping sites that cause the incremental recombination or loss of many electrons. TiO2 nanotube arrays (TNTAs), which are prepared by anodization, have a high aspect ratio, vertically-oriented structure, slow recombination, and fast charge transport in DSSCs. Herein, we reported the mechanism of TNTAs by anodization and how to improve the energy conversion efficiency of photovoltaics with TNTAs. |
