Abstract
The development of new photoactive structures by combining the lower and higher band gap materials with a controlled morphology can result in the efficiency improvement of the photo electrochemical cell. In this work, optimal change in optical, morphological and electrical properties of bismuth sulphoselenide (Bi2(S0.3Se0.7)3) thin films was observed through different surfactant assisted synthesis procedures. Chemical bath deposition method was implemented to synthesize surfactant assisted nano crystalline Bi2(S0.3Se0.7)3 thin films at room temperature. All these thin films were characterized for their optoelectronic properties by UV–Vis and FTIR spectoscopy, structural properties by X-ray diffraction; and surface and morphological properties by Field emission scanning electron and atomic force microscopy respectively. Photo conversion efficiency of photo electrochemical cell was observed through J–V measurement technique under standard conditions. Among all surfactants, sodium dodecyl sulphate assisted Bi2(S0.3Se0.7)3 thin films exhibited better photo electrochemical conversion efficiency.
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