Since Grätzel and O'Brian first reported dye-sensitized solar cells (DSCs) in 1991, much effort has been devoted towards improving their energy conversion efficiency.[1–3] Recently, the design and synthesis of infrared/near-infrared (IR/near-IR)-dyes has become an important topic in the area of solar cells since it has been recognized that the solar spectrum has a large photon flux in the region of 500–1000 nm. Improving the absorption of solar ...