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The technology of metal back surface passivation layer for solar photovoltaic cells is poised for takeoff.
Release time:
2020-12-22
Although the solar photovoltaic market is currently in a low period, it is also seen as a golden period for technological research and development. Recently, one of the technical focuses of concern for businesses on both sides of the Taiwan Strait is the backside passivation technology and equipment that many international equipment manufacturers have planned to launch over the past year. This technology not only allows the module end to inherit the current welding technology but is also expected to increase efficiency by 0.2 to 0.5 percentage points. However, equipment manufacturers are not rushing to launch it, considering the production yield and cost optimization on the client side.
Although the solar photovoltaic industry is currently in a low period, it is also seen as a golden period for technology research and development and practice. One of the recent technical focuses of concern for businesses on both sides of the Taiwan Strait is the metal backside passivation technology and equipment that many international equipment manufacturers have planned to launch in the past year. This technology not only allows the module end to inherit the current welding technology but is also expected to increase efficiency by 0.2 to 0.5 percentage points. However, equipment manufacturers are not rushing to launch it, considering the production yield and cost optimization on the client side.
Although the solar photovoltaic industry is currently in a low period, it is an active period for technological advancement. Solar energy companies state that this is a golden period for creating technology and competitive differentiation. Each company is preparing to effectively utilize differentiation to outpace other competitors in the next economic turnaround.
One of the new technologies actively being introduced in the equipment market is the metal backside passivation layer. Solar energy companies explain that this technology mainly uses AL2O3 thin film as the backside passivation film for P-type solar photovoltaic cells or the front side for N-type cells. The main purpose is to ensure that the electrons and electric fields generated by sunlight can safely reach the circuit within the cell, rather than being combined and obstructed like other technologies, which will enhance the conversion efficiency of the cells.
Solar energy companies point out that if we look at the basic process of solar photovoltaic cells, simply adding a metal backside passivation layer in the laboratory can increase the cell's conversion efficiency by 0.2 to 0.5 percentage points. They say that the important aspect is the inheritance of the currently widely used module welding technology at the backend, which requires no changes. This is one of the reasons that attract businesses on both sides of the Taiwan Strait, especially Taiwanese manufacturers focused on cell processing.
However, the introduction of this technology is expected to increase production stations by 3 to 5, and the consideration of yield after mass production is also one of the key points. Therefore, the technology and equipment enhanced by equipment manufacturers, along with the R&D technology of various solar energy factories, are crucial to success or failure. This is also one of the main reasons why solar energy factories on both sides of the Taiwan Strait are paying attention to the equipment launched by manufacturers.
Solar energy companies reveal that the suppliers or soon-to-be suppliers of this technology and equipment include Germany's Centrotherm, American Applied Materials, Dutch OTB, Germany's Roth & Rau, and France's Semco.
Solar photovoltaic cell manufacturers admit that whether it is double printing technology, selective emitter, emitter wrap through (EWT), metal wrap through (MWT), or metal backside passivation layer, the most important thing is still the core technological competitive advantage of each cell manufacturer. There is no single right or wrong choice.
Moreover, the restructuring of processes to improve efficiency does not have an equivalent additive effect, meaning that 1 plus 1 is less than 2. The improvement in efficiency is a key factor in creating a competitive advantage for solar photovoltaic manufacturers. However, the core of organizational competitiveness is how much cost is incurred to achieve the increased efficiency (Cost Per Watt), as solar energy emphasizes cost competition. This also highlights the importance of equipment manufacturers providing highly technical and cost-competitive equipment.
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