CHARACTERISTICS OF PHOTOVOLTAIC CELLS OBTAINED FROM SOLAR GRADE SILICON USING MONOLIKE TECHNOLOGY WITH APPROACHES OF TECHNICAL AND ECONOMICAL EFFICACY, AND COMPARISON WITH THE TRADITIONAL PREPARATION METHOD
Aisultanovich K.D. Plotnikov S. Lay P.
November 2022Asian Research Publishing Network
ARPN Journal of Engineering and Applied Sciences
2022#17Issue 211884 - 1892 pp.
The study investigates the potential for the production of solar cells from Kazakhstani p-type conduction, purified by a metallurgical method using the advantages of the monolike technology. According to the experimental data, it can be seen that the effective lifetime shows low indicators on the FE taken from the upper part of the ingots before the gettering process. This applies to multicrystalline silicon cells. After phosphorus diffusion, an increase in τeff can be seen, which does not depend on the material under study. As a rule, a decrease in the effective lifetime of charge carriers in silicon can occur due to the presence of a large number of metal impurities, which can create formations in the form of deposits in crystal defects or dissolve in silicon. This impurity can be interstitial iron (Fei), which can form additional energy levels in Eg. As a result, the recombination activity of the cell increases and τeff decreases. During phosphorus diffusion, those impurities with a sufficiently high diffusion coefficient can penetrate into the n-type layer and create electrically neutral clusters. It has been shown that silicon grown by the monolike technology has a longer carrier lifetime compared to standard mc-Si. In addition, it was shown that in the process of creating a FE, the lifetime of charge carriers increases due to the gettering effect without additional purification processes. The advantages of the developed technology were observed at the level of solar cells, manifested in an increase in efficiency and a decrease in the distribution of efficiency along the ingot height. In conclusion, it is shown that SC made of monolike silicon has a rather low degradation of efficiency when exposed to light. Silicon monolike in the near future may become a breakthrough in the photovoltaic industry due to the high potential for the production of solar cells with high efficiency and a significant reduction in production costs
directional crystallization , light degradation , monolike , silicon , solar cells
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Technical Physics, East Kazakhstan Technical University named after D. Serikbaeva, Kazakhstan
Department of Physics, East Kazakhstan Technical University D. Serikbayeva, Kazakhstan
Department of Physics, CEO of ECM Greentech, France
Technical Physics
Department of Physics
Department of Physics
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