Study of Electrophysical Properties of Cotton Fibers Doped Iodine

A Mamadalimov, N Khakimova, R Khakimova
2018 Journal of Scientific and Engineering Research   unpublished
The photoconductivity (PC) of the cotton fibers (CF) grade "F175" doped by iodine is investigation. The samples discovered a long-term relaxation of the PC after irradiation (hv=5 eV of the iodine doped CF and have been found infrared quenching at combined illumination. Introduction In [1] suggested that the temperature dependence of the electrical conductivity of the cotton fibers (CF) is associated with the appearance of semiconductor properties in them. In [2] the photoelectric properties CF
more » ... ctric properties CF doped with iodine studied and determined that the width of the band gap CF is E g = 3.2 eV. From the results of [2,3] one can conclude that the intrinsic viscosity can be considered as a good semiconductor material by heat, ionizing radiations, the introduction of alloying elements, it changes the electrical conductivity and photoconductivity. Our studies have shown that the physical properties depend on the variety and maturity of the intrinsic viscosity of CF. Despite the fact that the physical properties of CF of currently poorly understood at their basic thermistors [4], photo resistors [5], diodes and photodiodes [6], the electronic hydrometer [7] and the field effect transistors [8]. Extensive range of studies of nanostructured semiconductor CF reveals new physical laws and new items of electronic equipment. In this paper we present the results for CF grade F175 that previously little-studied, doped with iodine. In the measurements the mature CF were used. The samples were prepared in the form of a bundle of fibers laid parallel to each other in an amount of 5000-10 000 units alcohol impregnated 10 % iodine solution, and treated with t = 20-60 0 C for 30 to 600 minutes. The sample length was 4-8 mm. Ohmic contacts were created on the basis of a liquid suspension of graphite crystal. Current-voltage characteristics of the samples were made linear. Preliminary measurements showed that after doping CF with iodine the samples had n-type conductivity.