Dye sensitized solar cell (DSSC) are new type of solar cell, has aroused worldwide attention which arises from its
merits of low cost, ease of fabrication and environmental friendliness, etc. The development history, basic structure and working
principle of the DSSC are introduced briefly, and the classification and development of DSSC are stated in detail. Dye sensitizers
are divided into two major categories organic dyes and metal-organic compounds, and organic dyes can roughly be classified
into several parts.