Research on the Influence of Different Light Intensities on the Characteristics of Solar Cells

Abstract

In China, there is a wide range of renewable energy resources, with solar energy resources being the most extensive. Solar cells are devices that directly convert solar energy into electrical energy through the photovoltaic effect. This energy conversion process does not produce any harmful substances that could negatively impact the environment, making solar energy a highly environmentally friendly form of new energy generation. Various external conditions, such as light intensity, light angle, spectral range, temperature, and different materials, can affect the characteristic parameters of solar cells. These parameters include open circuit voltage, short circuit current, maximum output power of solar panels, fill factor, and conversion efficiency. To enhance the longevity and efficiency of solar cells, it is crucial to determine the optimal light intensity for solar cell power generation. This study aims to investigate the patterns of variation in the characteristic parameters of solar cells and their I/V characteristic curves by manipulating light intensity and environmental temperature. The experimental results demonstrate that temperature has an inverse relationship with open circuit voltage, while its impact on fill factor is not significant. Furthermore, the influence of temperature on short circuit current is greatest at 25°C and smallest at 15°C.