Visible Light Trapping in Dye-Sensitized Solar Cell with Vanadium-Doped ZnO as Back Reflector Layer

The back reflector layer (BRL) has been integrated with DSSC in the present work. The BRL was developed from zinc acetate dehydrate, ammonium metavanadate, and methanol as the precursor. The V:ZnO solution was deposited on the glass substrate using the spray technique, while the DSSC was fabricated by the screen-printing technique. Several characterizations were conducted following XRD for their structure, SEM for their morphology, absorption, transmittance, and reflectance spectra to study their optical properties. Then, the BRL was integrated with DSSC on the rear side. The V-I analysis shows the improvement of all photovoltaic parameters, not only EFF but also their FF, $V_{oc}, J_{sc}, V_{\max}, J_{\max}$, and $I_{sc}$. The highest DSSC efficiency was found for V:ZnO 15s (EFF = 1.93 %), allowing the efficiency enhancement of 6.74% from the control DSSC.