With the development of industry in

With the development of industry in the 20th century, the global energy crisis and air pollution are becoming more and more serious. Traditional fuel energy is decreasing day by day, causing more and more serious harm to the environment. At the same time, about 2 billion people in the world do not have normal energy supply. At this time, the whole world has turned its attention to renewable energy, hoping that renewable energy can change the energy structure of human beings and maintain long-term sustainable development. Among these, solar energy has become the focus of people's attention due to its unique advantages. Abundant solar radiant energy is an important energy source, which is inexhaustible, pollution-free, cheap and freely available to human beings. If 0.1% of the solar energy on the earth's surface is converted into electricity at a conversion rate of 5%, the annual generating capacity can reach 5.6×1012 kilowatt hours, equivalent to 40 times the energy consumption in the world.