At present, the independent research and development strength of China's photovoltaic enterprises is generally not strong, the main semiconductor raw materials and equipment are imported, and the technical bottleneck has seriously restricted the development of China's photovoltaic industry.
In the entire photovoltaic industry chain, the packaging technology and capital threshold are the lowest, resulting in more than 170 packaging companies in China in a short period of time, with a total packaging capacity of not less than 2 million kilowatts. However, due to the skyrocketing prices of raw materials and overcapacity of packaging, these companies have basically no profit, and the quality of their products is also uneven.
Relatively speaking, solar cell manufacturers such as Wuxi Suntech and Nanjing Zhongdian Photovoltaic, which are upstream of the industrial chain and have advanced technologies, have much better days. At present, they produce mostly first-generation crystalline solar cells with stable performance and are the mainstream products on the market.
However, in the world, solar cell products are transitioning from the first generation to the second generation. The thin-film solar cells of the second generation products use much less silicon, which is lower than the crystalline solar cells. In the opinion of experts, thin-film solar cells will compete fiercely with crystalline solar cells in the future.
Kong Li, a researcher at the Institute of Electrical Engineering of the Chinese Academy of Sciences and vice chairman of the China Renewable Energy Society, believes that China has a large gap with foreign countries in the subsequent research and development of crystalline solar cells and the development of thin-film solar cells, at least 10 years behind.
At present, the world record holder of photovoltaic technology is basically a foreign company. For example, Japan's Kyocera has introduced a polycrystalline silicon solar cell with a photoelectric conversion efficiency of 18.5%; Japan's Sanyo uses a hybrid solar cell made of a crystalline silicon substrate and an amorphous silicon film, and the photoelectric conversion efficiency is 22%; The flexible amorphous silicon thin film solar cell with the micron-sized stainless steel strip as the substrate has the advantages of light weight and flexibility compared with the glass hard substrate solar cells of other companies.
The world's photovoltaic technology continues to break through, and industry costs continue to decline. According to the 2007 China PV Development Report, with the continuous advancement of technology and the continuous expansion of industrial scale, the cost of photovoltaic power generation is expected to compete with conventional power after 2030, becoming a mainstream form of energy utilization.
At the 2007 World Solar Congress and Exhibition held in Beijing in September, Tang Chuanrong, vice president of the International Solar Energy Society and consultant of Japan's Kyocera Corporation, said that Japan plans to reduce the cost of photovoltaic power generation to equivalent in 2010, 2020 and 2030 respectively. At the level of 1.5 yuan, 0.93 yuan and 0.47 yuan per kilowatt hour. According to the International Energy Agency, in 2020, the world's photovoltaic power generation will account for 2% of total power generation, and in 2040 it will account for 20%-28%.
Holding/Retrieving Magnet,Magnetic Tool Holder,Pot Magnet,Lifting Magnets
Magtoon Magnetic Products Co., Ltd. , http://www.dg-magnets.com