H NMR spectro-scopy, TGA and diffusion coefficient. The synthesized siloxane pyridinium iodide electrolytes havecharacteristics of different chain length of siloxane moieties. The ion conductivities were given 2.7-3.2 S/cm.Among the three SiDPIs based electrolytes, DSSC employing the SiDPI2 gives an open circuit voltage of0.704 V, a short-circuit current of 15.85 mA/cm