In the history of solar energy development, the “light-up power” behavior caused by light c purlins for sale exposure to materials has been discovered as early as the 19th century. In 1839, the photovoltaic effect was first discovered by the French physicist A.E. Becquerel. The term “light-volt” appeared in English in 1849. The first solar cell was successfully produced by Charles Fritts in 1883. Charles uses a very thin layer of gold on the selenium semiconductor to form a semiconductor metal junction, which is only 1% efficient.
In the 1930s, camera exposure meters used the principle of light-electricity behavior extensively. In 1946 Russell Ohl applied for a patent for the manufacture of modern solar cells.
In the 1950s, with the gradual understanding of semiconductor physical properties and the advancement of processing technology, in 1954, when Bell Labs in the United States experimented with semiconductors, it was found to be more sensitive to light after incorporating a certain amount of impurities into silicon. After the phenomenon, the first solar cell was born in Bell Labs in 1954. The era of solar cell technology has finally arrived.
Since the 1958s, satellites launched by the United States have used solar cells as a source of energy. In the energy crisis of the 1970s, countries around the world were aware of the importance of energy development. The oil crisis occurred in 1973, and people began to transfer the application of solar cells to ordinary people’s livelihood. In countries such as the United States, Japan, and Israel, solar installations have been heavily used, and they are moving toward commercialization.
In these countries, the United States established the world’s largest solar power plant in California in 1983, which can generate up to 16 megawatts of electricity. Other countries in South Africa, Botswana, Namibia and southern Africa have also set up projects to encourage the installation of low-cost solar cell power systems in remote rural areas.
The country that promotes solar power generation is the most active country in Japan. In 1994, Japan implemented a subsidy incentive scheme to promote the “commercial parallel solar photovoltaic system” of 3,000 watts per household. In the first year, the government subsidized 49% of the funds, and the subsequent subsidies were reduced year by year. The “mains parallel solar photovoltaic system” is used when the solar energy is sufficient, and the solar battery supplies power to the load of the home. If there is excess power, it is stored separately. When the amount of power generation is insufficient or does not generate electricity, the power required is provided by the power company. By 1996, there were 2,600 solar power systems installed in Japan, with a total installed capacity of 8 megawatts. A year later, there were already 9,400 installations, and the total installed capacity reached 32 megawatts. With the rising awareness of environmental protection and the government subsidy system, it is estimated that the demand for solar cells in Japan will increase rapidly.
In China, the solar power industry has also received strong encouragement and funding from the government. In March 2009, the Ministry of Finance announced plans to subsidize large-scale solar projects such as solar photovoltaic buildings.