Dithienosilole Based Organic Sensitizers for Efficient Dye-Sensitized Solar Cells

efficiency Recently, organic sensitizers-based dye sensitized solar cells (DSSCs) have attracted much attention due to their several advantages such as low cost preparation, structural diversity, and high power conversion efficiency (η: 8-9%).1 Organic sensitizers consist typically of three segments of donor, π-linker, and acceptor (D-π-A), which are shown to have efficient intramolecular charge transfer (ICT) characteri-stics.2 Particularly, organic sensitizers bearing dithienosilole (DTS) as a π-linker have shown to have high efficiencies (η: 7.6-10.5%) in DSSCs performance due to its unique photo-physical properties (σ*-π * conjugation)3 and coplanarity.2,4,5 In addition, the efficiency in DSSC performance is a quite sensitive depending on the nature of substituents at 3-position of DTS ring. For examples, the bulky substitutio