A facile impregnation synthesis of Ni-doped TiO2 nanomaterials for dye-sensitized solar cells

Abstract This study reports a facile impregnation method for synthesizing Ni-doped TiO 2 nanomaterials using P25-TiO as starting material. The prepared were subjected to structural and optical characterizations subsequently employed in photovoltaic studies. X-ray diffraction (XRD) Raman studies confirmed that Ni doping did not alter the anatase rutile contents of . Also, presence constituent dopants their ionic states by Energy-Dispersive (EDX) photoelectron (XPS) spectroscopies. Topographic Atomic Force Microscopic (AFM) images illustrated had increased surface roughness Optical characterization UV-Visible spectroscopy revealed caused red shift light absorption due reduced bandgap improved dye adsorption on films. Then, photocurrent–photovoltage property fabricated devices was investigated optimized 0.10 wt% photoanode based device exhibited pronounced power conversion efficiency (PCE) 6.29% under air mass (AM) 1.5 conditions (100 mWcm −2 , 1 sun). Improved charge transport properties also observed electrochemical impedance spectroscopic (EIS) with compared control device.