Structural and optical characterization of PVA:KMnO₄ based solid polymer electrolyte

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• 作者：Omed Gh. Abdullah^a ; ^{omed.abdullah@univsul.edu.iq} ; Shujahadeen B. Aziz^a ; Mariwan A. Rasheed^b
• 关键词：Solid polymer electrolyte ; XRD analysis ; FTIR study ; Optical band gap ; Dielectric constant ; Refractive index
• 刊名：Results in Physics
• 出版年：2016
• 出版时间：2016
• 年：2016
• 卷：6
• 期：Complete
• 页码：1103-1108
• 全文大小：1627 K
• 卷排序：6

文摘

Solid polymer electrolyte films of polyvinyl alcohol (PVA) doped with a different weight percent of potassium permanganate (KMnO4) were prepared by standard solution cast method. XRD and FTIR techniques were performed for structural study. Complex formation between the PVA polymer and KMnO4 salt was confirmed by Fourier transform infrared (FTIR) spectroscopy. The description of crystalline nature of the solid polymer electrolyte films has been confirmed by XRD analysis. The UV-Visible absorption spectra were analyzed in terms of absorption formula for non-crystalline materials. The fundamental optical parameters such as optical band gap energy, refractive index, optical conductivity, and dielectric constants have been investigated and showed a clear dependence on the KMnO4 concentration. The observed value of optical band gap energy for pure PVA is about 6.27 eV and decreases to a value 3.12 eV for the film sample formed with 4 wt% KMnO4 salt. The calculated values of refractive index and the dielectric constants of the polymer electrolyte films increase with increasing KMnO4 content.