5,6,7-trimethoxy-2-(methylthio)quinoline with different anchoring groups: Synthesis and dye-sensitized solar cell applications

Two new metal-free organic dyes in D-π-A structure, containing a quinoline π-bridge and malononitrile (4a) cyanoacrylic acid (4b) as acceptors, were synthesized for the first time to apply dye-sensitized solar cell (DSSC). The structures of these compounds elucidated by FT-IR, 1H NMR, 13C NMR techniques. photophysical photovoltaic properties obtained investigated compared current density–voltage (J–V) graphs. Compound 4b an acceptor reached open–circuit voltage (Voc) 0.645 V, short–circuit density (Jsc) 6.66 mA cm-2 fill factor (FF) 0.70 presence chenodeoxycholic (CDCA), showing power conversion efficiency (PCE) 3.01%. It is also observed that incorporation thiomethyl group structure instead methoxy increases PCE.