Structure optimization of ruthenium photosensitizers for efficient dye-sensitized solar cells – A goal toward a “bright” future

Research on dye-sensitized solar cells (DSC) is progressing at a rapid pace. The structural and electronic factors associated with ruthenium photosensitizers can have a significant effect on the performance of DSCs. This review emphasizes the recent developments and strategies employed in the structural design of ruthenium photosensitizers. The influence of molecular engineering on photophysical and electrochemical properties along with photovoltaic parameters and the efficiency of DSCs are also reviewed. Hence, drawing a correlation between the structure of photosensitizers, the properties and photovoltaic parameters of corresponding DSCs will be helpful in terms of optimizing new dyes for the generation of efficient solar cells.

Graphical abstract. The recent developments and strategies employed in the state-of-the-art design of ruthenium photosensitizers and their influence on the photovoltaic parameters and efficiency of DSCs have been focused on this review. Hence, drawing a correlation between the structure of photosensitizers, the properties and photovoltaic parameters of corresponding DSCs will be helpful in terms of optimizing new dyes for the generation of efficient solar cells.Figure optionsDownload full-size imageDownload high-quality image (120 K)Download as PowerPoint slideHighlights► Various classes of ruthenium sensitizers in the dye-sensitized solar cells are reviewed. ► The absorption and redox properties of ruthenium sensitizers are discussed. ► The structure and photovoltaic parameters of ruthenium sensitizers are correlated.