Chang Hui briefly describes the solar panels of solar street lights

Solar energy has entered our daily lives. Many streets have installed solar street lights. However, there are still some technical bottlenecks and price problems for solar street lights. There is no way to achieve breakthroughs now. Therefore, the promotion and use of solar street lights is still restricted. . Solar panels can be said to be the key to the accessories of solar street lights. In fact, the biggest reason why solar street lights cannot be widely used is that solar panels cannot be developed and used on a large scale.　　Solar panel is a device that directly or indirectly converts solar radiation energy into electrical energy through photoelectric effect or photochemical effect by absorbing sunlight. Baoding, Hebei, can be said to be a pioneer in the research of solar panels. It is also known as the electricity valley city. In Baoding, solar street lights and solar photovoltaic products can be seen everywhere, from the corners of parks to the construction of hotel streets. , You can see solar street lights and photovoltaic products.　　 Solar panels generally use silicon as the material. It is precisely because this material is used that it is still not widely used in large-scale production. The production of silicon has a certain degree of pollution. At present, this is still a bottleneck that cannot be broken.　　 Solar panels are generally divided into monocrystalline silicon, polycrystalline silicon and amorphous silicon solar panels. This is generally shown from the classification efficiency of solar panels. The photoelectric conversion efficiency of monocrystalline silicon solar panels is the highest among all solar panels. But this kind of solar panel is also the most expensive to make. However, it can be used for up to 25 years; and polycrystalline silicon solar panels are cheaper than monocrystalline silicon, and they are simpler to manufacture, save energy, and have a lower total cost. Therefore, they have obtained a lot of development and play. It's just that the life span is shorter.　　 Solar panel is a relatively expensive device. Although it has a relatively long service life and is simple and convenient to install in use, the scope of use is still not very large. The final reason is that the production cost of solar cells is too high. Silicon is generally used in the production of solar panels. Therefore, the production cost is relatively large. In order to use such a simple thing as solar cells, scientists have been tirelessly researching new materials.