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Information × Registration Number 0222U000623, 0121U111034 , R & D reports Title Development of physical principles of acoustically controlled modification and machine-oriented characterization of silicon solar cells popup.stage_title Head Olikh Oleh Ya., Доктор фізико-математичних наук Registration Date 14-01-2022 Organization Taras Shevchenko National University of Kyiv popup.description2 Research object – the processes of charge transfer in silicon solar cells with different states of iron-related defects; transformation of iron-related defects in the case of ultrasonic loading conditions. Purpose of work – the developing, tuning, and training of a neural network assigned for estimating of iron concentration in silicon n+-p-p+ structures by ideality factor; the revealing of characteristics of FeB pair dissociation influence on the photoelectric parameters of silicon solar cells; the determination of physical features of FeB pair transformation under ultrasonic loading conditions. Research methods – modeling of current-voltage characteristics, tuning of an artificial neural network with help of both the lattice and random search, measurement of current-voltage characteristics, and short-circuit current kinetics, dynamic ultrasound loading. For the first time, the deep neural network, which can predict the concentration of recombinantly active impurities in silicon n+-p-p+ structures by the ideality factor, temperature, base thickness and doping level, has been developed. The network was tuned and the optimal values of hyperparameters were determined. The ability of the developed neural network to estimate the iron concentration in silicon solar cells from the synthetic as well as experimental current-voltage characteristics has been shown. It was revealed that the short-circuit current and the maximum output power are the most sensitive to the dissociation of iron-boron pairs in silicon solar cells; the method for estimating iron concentration using relative changes in those parameters has been proposed. For the first time, the acoustically driven decreases in the portion of FeB pairs that dissociate under the action of light as well as the decrease in Fe ion migration energies have been found in silicon solar cells.  Product Description popup.authors Vlasiuk Viktor M. Korkishko Roman М. Kostylyov Vitaliy P. Lozytsʹkyy Oleh V. Mayko Kateryna О. popup.nrat_date 2022-03-09 Close