Tag: Properties of crystalline silicon solar cells
Efficiency and characteristics of solar cells
1. Efficiency of solar cells The photoelectric conversion efficiency n of a solar cell is the ratio of the output electrical power to the incident light power when the solar cell is illuminated by light, referred to as cell efficiency, which can be expressed as where Ai is the area of the solar cell; Pin is the…
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Equivalent circuit, output power and fill factor
1) Equivalent circuit Figure 1 shows the equivalent circuit of a solar cell under stable illumination. It consists of the following circuit elements: a current source capable of generating a photocurrent IL, a diode VD under forward bias, a resistor Rsh in parallel with the diode, a capacitor Cf, and a resistor Rs in series with the…
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Photocurrent and photovoltage
The illumination characteristics of silicon solar cells are shown in Figure 1. It can be seen from the figure that the short-circuit current increases linearly with the increase of light intensity, the open-circuit voltage increases exponentially with the increase of light intensity, and tends to be saturated under strong light. The I-U characteristic curves of…
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