Abstract:Dye-sensitized solar cells (DSSC) attracted widespread attention for its low cost, being easy to manufacture, large-scale production and environmentally friendly features. Sensitizer is a core component of the DSSC which plays a role in collecting sunlight and injecting excited state electron into the conduction band of the semiconductor, which is crucial to the photo-electric conversion efficiency. Organic dyes have a number of advantages such as easy synthesizing and tuning of photo-physical and electrochemical properties through molecular design. Triphenylamine is a strong electron donating group, and its non-planar spatial structure makes the degree of the dye molecules aggregation to be decreased. These properties are conducive to improve the absorption properties of the dye and the electron transport efficiency. In recent years, triphenylamine or substituted triphenylamine as electron donor of organic sensitizers becomes the research focus for improving the photoelectric conversion efficiency of solar cells. In this paper, the progress of triphenylamine photosensitive dyes is described.