Fabrication of photoelectrochromic cell on flexible substrate by screen printing technique

In this study, the characteristic and fabrication of a photoelectrochromic (PEC) cell were researched. In order to investigate the optimal coloration of PEC cell, fabricating titanium dioxide (TiO₂) colloid with different parameters on photoelectrode in PEC cell is necessary. Two electrodes both were fabricated on flexible substrates by screen printing technique. Further, tungsten trioxide (WO₃) was utilized as an electrochromic layer. The transmittance of PEC cell was measured by UV-visible spectrophotometer, which decreased from 80 % to 2 % for 1 minute at near infrared range under illumination. Finally, the conversion efficiency of the flexible dye-sensitized solar cell (DSSC) is 1.74%.