Solar Cells Can Work on Cloudy Days and Nights


There are two main forms of solar power generation, light and thermal power generation and photovoltaic. Thermal Power generation is the use of solar radiation generated by the thermal power generation, and photovoltaic power is the use of semiconductor materials photovoltaic characteristics of the effect of direct solar energy into electricity.

Solar cells that can generate electricity at night

Most people think that solar cells can only be used in sunny daytime. As scientists delve into solar cells, solar cells that can generate electricity at night have been successfully developed. According to Xinhua reports, “All-weather” solar cells work principle: When the sun shines on solar cells, not all solar light can be absorbed into the battery and converted into electricity, only part of the visible light is effectively converted to electricity. To this end, the researchers introduced a key material in the battery, which made the solar photovoltaic conversion efficiency slightly higher during daylight hours, while also storing the energy of the invisible visible and near-infrared light in the material and releasing it in the form of monochromatic visible light at night. At this point, monochromatic light is absorbed and converted into electricity by the light absorbent, enabling solar cells to generate electricity during the day and night.

In addition, the Australian National University has developed an exotic nano-material that has a nanoscale structure that is composed of gold and magnesium fluoride, emits radiation in a particular direction, and changes the shape to emit special light, according to the science and technology daily. This material can be used to make thermal photovoltaic cells and generate electricity in the dark by collecting heat.

Solar cells that can be used in rainy days

In addition to the night, cloudy days can also use solar cells. Researchers at the Federal Institute of Technology in Lausanne, Switzerland, used perovskite materials as a light trapping device and used an organic hole transport material to replace the electrolyte used in traditional batteries, the Science Daily reported. This method increases the conversion efficiency of dye-sensitized solar cells to 15%, and also has high conversion efficiency in cloudy and artificial light environment.

We believe that through the efforts of scientists, the future use of solar cells will be more and more popular, convenient, let us wait and see.