Innovation of photovoltaic solar energy: overview of crystalline silicon
most surveys have concluded that crystalline silicon photovoltaic solar energy (c-Si PV) still accounts for a large share of the installation market of solar power generation facilities. But with the rapid development of other solar energy technologies, how can companies that produce crystalline silicon solar energy equipment maintain their leading edge and even continue to expand market share? Joyce larid visited some companies engaged in crystalline silicon photovoltaic solar energy industry
from the initial departure from Suntech, aide solar became a member of PANJIT group (Kaohsiung, Taiwan) in 2007. With PANJIT group as its backing, aide solar began to expand and improve its production capacity, and more actively carried out business as a supplier in the market
"for the whole market, improving the efficiency of batteries and module components is the mainstream trend of the market. There is such a big trend to improve the efficiency, because these measures can reduce the system cost per watt of power in equipment installation," said Mr. raumond Wiley, the director of aide solar USA
many analysts also agree with this view, which is also the core of photovoltaic technology innovation. For many years, thin film technology has been close to crystalline silicon technology, because the manufacturing cost of thin films is relatively cheap, and they are not limited to the crystal form of silicon, but the price of thin film materials is still more expensive than that of amorphous silicon or other semiconductor materials. In recent years, as the cost of some silicon has declined, crystalline silicon technology has partially recovered its lost ground. Why? Because crystalline silicon has better performance, and the installation price is relatively cheap. Some people believe that if the price of equipment using crystalline silicon technology falls, the price of thin-film equipment is bound to fall by at least 12%. This is because the installation price of high-performance technology is often cheaper (because regional factors will affect the stability of the system, land cost and installation time). Similarly, technologies with less than 10% conversion efficiency have almost no competitive advantage in the application of electrical interconnection. All these factors are good news for practitioners of crystalline silicon
BioSolar, headquartered in California, has spent the past four years perfecting a technology that can benefit almost all solar photovoltaic equipment manufacturers. "Today, petroleum based plastic products are used in almost all the production of solar panels. But with the rising cost of raw materials, and these raw materials are not natural and environmentally friendly products that lead to the failure of the hydraulic system of the tensile testing machine, we have developed a scheme to end our dependence on petroleum based raw materials," said Dr. David Lee, President and CEO of BioSolar
Canadian Solar is a leading supplier of vertically integrated photovoltaic products. "Our global production capacity of 1GW (gigawatts) makes us a leading company in the industry," said Mr. Mike Miskovsky, general manager of U.S. business
evergreen solar, headquartered in Massachusetts, is also a vertically integrated crystalline silicon photovoltaic manufacturer. "It is our unique manufacturing process from raw materials to finished solar panels that makes us different," said Mr. Chris Lawson, marketing director
sharp also invested in the product development of crystalline silicon solar power generation and TFPV photovoltaic solar energy industry market. Mr. Paul WORMSER, senior engineering director of sharp Solar Group in Huntington Beach, said, "in sharp, we think we are a photovoltaic solar company, not just a simple crystal or thin-film solar product company."
American solaria company, which has been established for only seven years, spent a whole year on product development, and its technology began to commercialize in 2009, and was put into mass production in 2010. "Our technology is basically a component that uses optical enhancement technology for low concentration c-Si PV," said Mr. Daniel Shugar, CEO of the company. "The common point of all crystal components is that no matter how large the size of the battery manufactured by the manufacturer, its cost accounts for 75% of the production cost. If you can reduce the number of solar cells on each solar panel, you can greatly reduce the cost of the product. Therefore, we began to develop products that can achieve this goal."
German Solon company is famous for producing solar panels with the best accessories in the market. "We work with different suppliers to obtain the best accessories to prolong the life of the battery and maximize the efficiency of the battery in practical applications." Said Mr. Daniel alcombight, vice president of North America. "We work closely with universities, colleges and other partners in some innovative research. Because we are not a battery manufacturer, we can focus on the whole system and the kWh we can get from the system."
Suntech Power, headquartered in Jiangsu Province, China, has been engaged in the solar energy industry for 10 years. It can be said that it is one of the largest manufacturers of crystalline silicon photovoltaic solar products in the world
"Upsolar is a supplier of solar components in China, and the semiconductor manufacturing mode we adopt enables us to be unique in the industry," said Mr. Troy dalbey, North America sales manager of Upsolar USA. "Although we outsource the whole manufacturing process, we personally supervise all manufactured components and manufacturing facilities and processes."
leading technological advantages
what makes aide solar different from other solar manufacturers? It is because they have rich experience in dealing with semiconductors. "Our advantage is that when we start to build new factories, we can use the knowledge of NJIT group in semiconductors to help us set up photovoltaic solar cell production lines when PA is developing green packaging. You can call it a cross cutting technology," Mr. Wiley saidMr. Wiley said that before that, they had been buying high-efficiency monocrystalline silicon solar cells in the market, but the most efficient cells they could find and buy were only about 17% efficient. "After exploring our own battery technology, in just two months, we have increased the overall percentage of our own batteries, so the performance of our own solar components has been improved due to our experience in semiconductors."
"the equipment we use is one of the few photovoltaic product manufacturing equipment with a workshop cleaning system. Our factory is a factory with a class 1000 clean room standard, and our equipment is generally equipped with high-efficiency particulate air filters and protective covers with a cleanliness of class 100. We also have air showers, and workers wear protective clothing and gloves." He said. "We achieved 18% efficiency in just two months. We expect that we can easily achieve 20% or even 24% efficiency by the end of this year."
biosolar's biobacksheet product is a new material used to replace the currently commonly used backplane/backplane material. When BioSolar began to design and develop a new commercial basic backplane for the crystalline silicon solar market, they followed three standards: first, it must be green, second, it must be cheaper, and third, it must be more durable than existing products. At present, the most common backplane configuration used by crystalline silicon photovoltaic manufacturers is: PVDF composite film tpttm or TPE thermoplastic elastomer, both of which adopt three-layer composite structure. "The problem with multilayer structure is that every time you combine two or three different materials, especially when they are laminated together, the problem of adhesion coefficient will arise. Because when you use two different materials, they will produce delamination under thermal expansion or pressure. For a long time, this problem has plagued the field of solar cell component production."
"we have developed a single-layer, green and environment-friendly backplane, which simply uses a single layer. Nothing can make it layered, and its performance in all aspects can be comparable to or even better than the standard TPT or TPE used now, and it is 100% green and environment-friendly. The biobacksheet is made from a patented polyamide resin formula based on castor oil." Mr Lee said
canadian Solar has been using its testing laboratory to improve its products in many ways, and a unique product has attracted great attention in the market. It is a trackless automatic manufacturing system used to manufacture standard and high-efficiency solar crystal panels and Newedge solar panels. This product will likely reduce the cost of installing solar energy equipment in residential buildings by 50%
"What we did was to help Zep solar, a California company, improve their technology and obtain licenses for their technology. They designed a product, which is basically a groove structure, and then we applied their design to the framework of solar panels. Other related components are exactly the same - the same electrical characteristics and the same laminate. We just created this completely different With the same shape of the battery board, it can install the system hardware on any roof, and can quickly connect them together through a very simple process. You only need to clamp the grooves of this specially designed battery board with each other, and they can be connected with each other. Twisting the battery board 90 ° can form a stable structure between them, "Mr. Miskovsky explained. "As long as these components are connected to each other, they can form a single bonding grounding device," he said
evergreen may be one of the most unique methods for manufacturing photovoltaic crystalline silicon cells at present. String ribbontm chipset is a unique product of evergreen that is different from other manufacturing technologies. It is completely different from the standard method of cutting silicon ingots into silicon wafers (for example, the clamp clamping surface of samples such as plastic film and fiber wire, and the silicon wafer produced by evergreen uses the 'linear' technology developed by them.
evergreen solar introduced a series of new solar panel products on intercooler in June 2010. According to Mr. Lawson, these new products will provide more power, improve efficiency, and become the most attractive products in the solar panel industry 。 "These solar panels are designed to provide more electricity and minimize the impact on the environment while generating electricity. Using our belt panels, these new products will continue to achieve the minimum carbon emissions and the fastest payback period of energy investment (less than 12 months) compared with any other silicon-based solar panel products in the current market," he said
"our commercial es-e performance series solar panels use ribbon solar cells produced using the latest and most advanced next-generation boost cell TM technology. They will replace our current es-a series solar panels from the end of 2010," Lawson added
boost cell technology is characterized by solar energy