During my research work, I came across this interesting segment of Third Generation Solar Cells, i.e. Dye Sensitized Solar Cells (DSSC). I realized the importance of putting together the fundamentals of the DSSC, for convenience of the researchers who choose to contribute to this section. This book is a result of a sincere and selfless effort from me and my co-authors. We have tried our best to bring forth all the basic information and scope of the DSSC. This book would prove to be of great use to researchers, especially the beginners in the field of DSSC.