Mesoscopic Solar Cell Sensitization: From Dye to Organometal Perovskite

Mesoscopic solar cell is a class of third-generation solar devices. A striking characteristic of mesoscopic solar cell is that the fabrication of the absorber layer can be conducted by solution-based approach; this non-vacuum processing renders significant reduction of the fabrication cost. In this article, we will review the recent development of light absorbing materials for mesoscopic sensitized solar cells. We will focus on the state-of-the-art development of dye molecules, inorganic semiconducting quantum dots, and organic-inorganic perovskite materials. We will also summarize some innovative sensitization methods in the device fabrication for the improvement of light absorptions. Finally, we will highlight some unique properties of each sensitizer and make a comprehensive comparison. Keywords: Dyes, light absorbing materials, mesoscopic solar cells, perovskites, quantum dots, sensitization methods.