Dye-Sensitized Solar Cells (DSSCs) offer the advantages of simple structures, easy manufacturing, low cost, and high power conversion efficiencies. Therefore, DSSCs have become one important area of solar cell researches. A typical DSSC consists of a transparent conductive substrate, a porous thin-film photoelectrode composed of TiO2 nanoparticles, dye, electrolyte, and a platinum counter electrode. Each part of the cell has crucial effects on overall cell efficiency. This paper will focus on development of nanostructures for various parts of the devices and novel organic dyes for efficient DSSCs.