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　　Thin film Nickel Hydride No. 5 batteriestechnology has low energy consumption and will dominate the future of photovoltaic industry

　　Thin film solar cell technology represents the development direction of photovoltaic technology. For a long time in the future, thin-film solar cells and crystalline silicon solar cells will coexist, but thin-film photovoltaic products will soon expand their market share and grow rapidly, eventually with copper indium gallium selenide (CIGS) and other Thin film solar cell technology represented by PVDF will become the mainstream of the photovoltaic industry. Zhuang Daming, executive vice president of the School of Materials Science and Engineering at Tsinghua University, said in an interview with reporters recently.

　　Recently, the "Opinions on Promoting the Application and Industrial Upgrading of Advanced Photovoltaic Technology Products" (hereinafter referred to as the "Opinions") jointly issued by three national ministries and commissions has aroused heated discussions in the industry. Zhuang Daming believes that the support for thin-film solar energy in the "Opinions" reflects the country's technological orientation. In the future, the market share of thin-film batteries such as copper indium gallium selenide will gradually increase, thus promoting the transformation and upgrading of China's photovoltaic intelligent manufacturing industry.

　　Thin film technology consumes less energy and will dominate the future of the industry

　　In the past ten years, my country's photovoltaic industry has experienced a period of rapid development, but it has also exposed problems such as the low end of the industrial chain and blind expansion of production capacity. Zhuang Daming believes that for polycrystalline silicon cells that currently dominate the market, the photoelectric conversion efficiency of its components is between 15-18%, which is slightly higher than that of thin film cells. However, from the perspective of its entire life cycle, polycrystalline silicon cells have high purity of raw materials. The production process of silicon is highly energy-consuming and highly polluting. Thin-film solar cells represented by copper indium gallium selenide will gradually replace polycrystalline silicon cells and become the mainstream technology direction of future photovoltaic development. This has become the consensus of many academics.

　　He said that one-sided judgment of the quality of solar energy technology based on conversion efficiency is a cognitive misunderstanding in the photovoltaic industry. Different technical routes are suitable for different application scenarios and need to be evaluated from the perspective of photoelectric conversion efficiency, manufacturing cost, service life, cost performance and sustainable development. For copper indium gallium selenide batteries, if the module can achieve a conversion rate of 14%-16%, it has reached a world-class leading level. In addition, copper indium gallium selenide has a long service life, and its power generation capacity is stronger than that of crystalline silicon at the same power. In the manufacturing process, it consumes less raw materials and has more advantages in terms of energy consumption and pollution. Therefore, national policies are also more Prefer to support thin film technologies such as copper indium gallium selenide.

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