Abstract
Increase in the efficiency and reduction of silicon consumption in production of solar cells are relevant problems. Designing two and three facial solar cells can be seen as a solution for such tasks. Compared to usual SC, the output power of two and three facial solar cells exceeds by 1.72 times by 2.81 times, respectively. Illumination of solar cells with high intensity light makes the temperature of its heating an important characteristic. Therefore, the paper investigates the influence of temperature on properties of multifacial solar cells. We defined the nature of change of temperature coefficients for the main photovoltaic parameters that are inherent to silicon solar cells under various (one, two and three facial) conditions of lighting. Temperature coefficients of three facial solar cells are 2.52·10–3 V/K for open circuit voltage and 1.8·10–3 K–1 for fill factor of I-V. At temperature change of SC from 300 K to 350 K, the density of short circuit current decreases only by 4 %.
Highlights
Continuous growth of the needs in energy that humanity has stimulates faster development of renewable energy sources
The main photovoltaic parameters of silicon solar cells (SC) with thickness of 175 μm are determined under 4 various conditions of lighting
Note that the volume of a short circuit current of SC for the lighting conditions in parallel or perpendicularly to the front of p-n junction are identical. This fact means that the mechanics of photo generation and collecting of charge carriers by p-n junction are identical for the accepted SC sizes
Summary
Continuous growth of the needs in energy that humanity has stimulates faster development of renewable energy sources. They are the most primary solutions that ensure growing energy consumption without negative impact on the environment [1]. The efficiency of silicon SC that agree with theoretical expectations does not exceed 29 % [4] Both industrial and laboratory silicon SC did not reach this value yet. For the increase in the photovoltaic transformed energy, silicon bifacial SC were designed [7]. The influence of sunlight incident angle changes and temperature changes on the main photovoltaic parameters of SC on silicon base with volume metals nanoparticles was investigated in [10, 11].
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