Triarylamine-functionalized ruthenium (Ru) complexes with different conjugation linkage lengths are synthesized and applied to dye-sensitized solar cells (DSSCs). These triarylamine-functionalized Ru complexes show appreciably high extinction coefficients. DSSCs based on the new dye show higher power conversion efficiency than standard N3 dyes under same conditions. Among others, Ru-TP3 dye that has the longest conjugation length shows the highest efficiency of 3.7% under simulated 1 sun illumination (AM 1.5).