With the growing demand of the photovoltaic market, high cost of the traditional silicon-based solar cells has been the biggest barrier for its widespread use of solar energy conversion. New generation solar cells, aiming at the low-cost and high- efficiency photovoltaic devices, have been researched for a couple of decades. Among the new generation solar technologies, dye-sensitized solar cell (DSSC) normally employing a nanoporous TiO2 photoanode draw a quite attention to meet future solar energy market demanding because its realizable low-cost property and high-efficiency achievement. Continuing efforts have been devoted to improve the performance of DSSCs. However, there are still several drawbacks need to be overcome. The major drawbacks mainly focus on the electron recombination and low-efficiency electron transport in the nanoporous TiO2 photoanodes, which significantly limit the practical application of DSSCs. Therefore, the main task of this thesis is to retard the electron recombination and to improve the electron transport efficiency in the nanoporous TiO2 photoanodes for DSSCs through interfacial and structural modification strategies.