Study on Electrophysical Properties in KMnO4-Doped Grade "Xorazm-150" Cotton Fibers

The main objective of the research was to identify the semiconducting characteristics of mature medium-thick (diameter 14, 15 µm) "Xorazm-150" cotton fibers both undoped and doped with 1.5% aqueous solution of KMnO4, including current versus voltage and temperature dependence, temperature dependence of electrical conductivity, the influence of doping time on conductivity, and photoconductivity. The research was conducted in the temperature range (296-360 K) and the voltage range (0-100 V). The infrared spectra of the undoped and KMnO4-doped samples were studied (Both samples were mercilized with NaOH). It was found that the cotton fibers sample doped with KMnO4 had considerably higher electrical conductivity than the undoped sample. It was determined that the cotton fibers sample doped with KMnO4 obeys the law of Ohm when current flows through it. Also, it was analyzed that the formation of photoconductivity of the cotton fibers sample doped with KMnO4 under the influence of ultraviolet radiation indicates that the photoconductivity is mainly related to the formation of band electron-hole pairs. The deep surface created by doping cotton fibers with a 1.5% solution of KMnO4 in water was found to have an activation energy that was determined from the results.