Organic dopant added polyvinylidene fluoride based solid polymer electrolytes for dye-sensitized solar cells |
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Institution: | 1. Physical and Life Sciences, Lawrence Livermore National Laboratory, PO Box 808, L-372, Livermore, CA 94551, United States;2. Department of Physics and the Quantum Theory Project, University of Florida, Gainesville, FL 32611, United States;3. Materials Science and Technology Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831, United States;4. Department of Physics, University of North Carolina Asheville, Asheville, NC 28804 , United States;1. High Pressure Physics Lab., Department of Physics, University of Rajasthan, Jaipur 302004, India;2. Mineral Physics Division, CSIR-National Geophysical Research Institute, Hyderabad 500007, India;3. Inorganic and Physical Chemistry Division, Indian Institute of Chemical Technology (CSIR), Hyderabad 500007, India |
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Abstract: | The effect of phenothiazine (PTZ) as dopant on PVDF/KI/I2 electrolyte was studied for the fabrication of efficient dye-sensitized solar cell (DSSC). The different weight percentage (wt%) ratios (0, 20, 30, 40 and 50%) of PTZ doped PVDF/KI/I2 electrolyte films were prepared by solution casting method using DMF as a solvent. The following techniques such as Fourier transform infrared (FT-IR), differential scanning calorimetry (DSC), X-ray diffractometer (XRD) and AC-impedance analysis have been employed to characterize the prepared polymer electrolyte films. The FT-IR studies revealed the complex formation between PVDF/KI/I2 and PTZ. The crystalline and amorphous nature of polymer electrolytes were confirmed by DSC and XRD analysis respectively. The ionic conductivities of polymer electrolyte films were calculated from the AC-impedance analysis. The undoped PVDF/KI/I2 electrolyte exhibited the ionic conductivity of 4.68×10?6 S cm?1 and this value was increased to 7.43×10?5 S cm?1 when PTZ was added to PVDF/KI/I2 electrolyte. On comparison with different wt% ratios, the maximum ionic conductivity was observed for 20% PTZ-PVDF/KI/I2 electrolyte. A DSSC assembled with the optimized wt % of PTZ doped PVDF/KI/I2 electrolyte exhibited a power conversion efficiency of 2.92%, than the undoped PVDF/KI/I2 electrolyte (1.41%) at similar conditions. Hence, the 20% PTZ-PVDF/KI/I2 electrolyte was found to be optimal for DSSC applications. |
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Keywords: | Polymers Organic compounds Thin films Differential scanning calorimetry Electrochemical properties |
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