In the presented research work, the kinetics and mechanism of the deposition process of thin iron, selenium and Fe-Se films have been studied by recording a cyclic and linear polarization curves by potentiodynamic method using Pt and Ni electrodes. Individual and co-deposition potential areas of the components of the electrolyte on the Pt electrode were determined. In order to determine the optimal electrolysis mode and electrolyte composition, the effect of various factors (concentration of initial components, temperature, etc.) on the co-electrodeposition process of Fe-Se was studied. In addition, Fe-Se samples deposited on the surface of Ni electrodes were thermally treated at 4500C and studied by SEM and X-ray phase analysis methods. Elemental analysis of the films shows that they contain 42.2% Fe and 57.8% Se.
Данная работа посвящена изучению математической модели для оптимизации процесса получения тонких пленок Bi-Se электрохимическим методом. Исследование проводилось потенциодинамическим, потенциостатическим и гальваностатическим методами, в различных условиях на Pt и Ni электродах. Математические расчеты были выполнены в программном пакете с использованием специально разработанного для этого процесса программного обеспечения. С изучением влияний различных факторов (концентрации исходных компонентов, температуры, плотности тока и т.д.) были выбраны оптимальный режим электролиза и состав электролита для процесса совместного осаждения. По этим результатам для будущих целей были назначены критерии Снедоккора и Фишера и оценены коэффициенты регрессии. Полученное уравнение регрессии определяет содержание электролита и условия электролиза, которое позволяет осаждать сплав Bi-Se, содержащий в составе необходимое количество Bi.
Due to the unique properties of metal dichalcogenides, they are wide used in various fields of nano- and optoelectronics. Bi2Se3 is one of the promising n-type semiconductor materials belonging to the Av – Bvı group, with a band gap of 0.3 eV. To obtain these compounds by co-electrodeposition, we study the electroreduction of the initial components separately. Therefore, the study is devoted to the electrochemical reduction of selenite ions from the ethylene glycol solution. By drawing cyclic and linear polarization curves on Pt electrodes, the kinetics, the mechanism of the process, and the influence of various factors on the electroreduction of selenite ions are studied. Using the obtained data on the influence of temperature, the effective activation energy was calculated by the Gorbachov method. The calculation results show that the electroreduction of selenite ions from ethylene glycol is accompanied by electrochemical kinetics closer to diffusion
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