Enhanced photovoltaic properties of dye-sensitized solar cells by use of znsb2o4 doped tio2 photo anode

Chaitanya M

A series of ZnSb2O4 doped TiO2 photo anode material for dye-sensitized solar cells prepared by simple solid-state reaction method, followed by high-energy ball milling by taking of ZnSb2O4 content of 0, 3, 5 and 7 mol%. The structural and morphology studies carried out by X-ray powder diffraction (XRD), scanning electron microscopy (SEM). ZnSb2O4 doping and ball milling significantly improve the power conversion efficiency of TiO2 photo anode of Dye-sensitized solar cells (DSSC). Results indicate that the 3 mol% of ZnSb2O4 doped TiO2 achieved highest power conversion efficiency and fill factor of 9.572 % and 0.702, respectively. The energy-conversion efficiency of 3.0 mol% ZnSb2O4-doped TiO2 is significantly better, by about 28.4 %, compared to that of a cell based on undoped TiO2. In addition, electrochemical parameters were calculated from electrochemical impedance spectroscopy data under standard simulated sunlight. Transfer resistance at the interfaces and electron life time were decreased as optimum concentration of ZnSb2O4, indicated that electron transferring rate was improved.

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DOI: http://dx.doi.org/10.24327/ijcar.2017.7975.1264
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