Novel synergistic Combination of W and Co Co‐doped ZnO Nanoparticles Incorporated as a Photoanode in a Dye Sensitized Solar Cell

Abstract In this study, a low‐cost and simple Sol‐gel technique has been used for the synthesis of W/Co co‐doped ZnO nanoparticles. XRD examinations demonstrate the hexagonal wurtzite structure. To investigate the morphology of ZnO nanoparticles was demonstrated by using SEM and TEM. EDS and FTIR spectra verify the triumphant doping of the W and Co into the ZnO lattice. The optical measurement shows that as the concentration of Co increases the band gap decreases from 3.2 eV to 2.73 eV. The DSSCs based on 0.5 % W and 1.6 % Co co‐doped ZnO photoanode achieved the highest open‐circuit voltage of 0.69 V having a short circuit current density of 8.46 mAcm −2 , and PCE of 3.16 %.