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Crystalline silicon has been the material of choice for solar cell manufacturers since the 1950s. Compared to other similar materials, crystalline silicon has the highest conversion efficiency and stability, but it also has a flaw, namely transparency. However, South Korean scientists believe they have found a solution: drilling holes in crystalline silicon.
Transparent solar cells can bring enormous benefits to humanity's renewable energy and have a wide range of applications, such as replacing windows.skyscrapers, car skylights and smartphone screens. In their quest for transparency, scientists have explored different materials and designs of solar cells, but they all involve sacrifices in efficiency, transparency, and long-term stability.
However, scientists at South Korea's Ulsan National Institute of Science and Technology and Korea University believe their new transparent solar cells will make no compromises. Kwanyong Seo, co-senior author of the paper, said: “My team members concluded after extensive testing that crystalline silicon is the best material for developing glassy, high-efficiency, high-stability and high-stability solar cells. neutral in color. is of great use to all of us. It's a crazy idea. The problem is that crystalline silicon is not transparent, so no one before us has tried to make it.quer transparent crystalline silicon with a neutral color. "
Seo and his team are working on this. A major breakthrough was made when they drilled a series of small holes in the crystalline silicon. To avoid the reddish tint and other colors that characterized the cells transparent solar panels in the past, the team has drilled holes in the crystalline silicon the size of a human hair to allow light to pass through
The holes are arranged in an elaborate pattern. which is invisible to the naked eye In testing, transparent solar cells showed long-term stability and a conversion efficiency of 12.2%. This is still far from the 20-25% efficiency. commercial solar cells, but it is a significant improvement over the transparent solar cells currently under development
The research team is also testing the potential application of this cell s.transparent solar like window. When tested in low light, conventional solar cells lose about 30% of current. In addition, scientists also found that low-angle light can reduce the current of solar cells by less than 4%.
Seo said: "We want to replace the existing windows. We need to overcome many difficulties, such as laws and regulations. We also need mechanical stability and strength to use our device to replace current windows in buildings."
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1. Properties
Crystalline silicon solar cell module: The most widely used solar cell, mainly due to crystalline silicon. Stability and efficiency can reach 15%-25%.
Thin-film solar modules: Using discarded silicon wafers, silicon wafers are not necessarily cheap given their efficiency levels.
2. Features
Crystalline silicon solar cell modules: Monocrystalline silicon comes from high purity single crystals, cut into wafers with a diameter of 150mm and a thickness of 200mm. Polycrystalline silicon is more popular and can be manufactured in larger quantities. For example, silicon is cut into strips and then sliced. The manufacturing process of polycrystalline silicon solar cells is similar to that of solar cellss made of monocrystalline silicon, but photoelectric conversion efficiency. of polycrystalline silicon solar cells is much lower, its photoelectric conversion efficiency is about 15%.
Thin film solar modules: The manufacturing method is completely different from crystalline silicon solar cells. The process is greatly simplified. The silicon consumption is very low and the power consumption is lower. it can produce electricity in low light conditions. However, the main problem of amorphous silicon solar cells is that the photoelectric conversion efficiency is low, the international advanced level is about 10%, and it is not stable enough. Over time, its conversion efficiency decreases.
Detailed information:
Basic requirements for solar cell modules:< p>1. Hecan provide sufficient mechanical strength for solar cell modules to withstand stress caused by shock, vibration, etc. during transportation, installation and use, and can withstand the impact of hail;
2. .It has good sealing properties and can prevent wind, water and corrosion of solar cells under atmospheric conditions;
3. It has good electrical insulation properties
4. aptitude.
Baidu Encyclopedia-Solar Cell Components