Molecular Design of Squaraine Dyes for Efficient Far-red and Near-IR Sensitization of Solar Cells

Abstract
The introduction of short carboxyl anchoring groups into anilino-squaraines resulted in a much improved photosensitization on nanocrystalline TiO2 electrode over far-red/near-IR region, yielding a maximum monochromatic incident photon-to-current conversion efficiency of 73% at 670 nm.