Topcon, with its high efficiency and compatibility with PERC production lines, has become the preferred technology for the iteration of the photovoltaic industry. With the maturation of technology and the decline in costs, it will dominate the market in the next five years and lay the foundation for the next generation of tandem batteries.
A. Core Advantages
High efficiency: The laboratory efficiency exceeds 26% (theoretical limit 28.7%), and the mass production efficiency is 24%-25.5%, which is 1-2% higher than PERC.
2. Low attenuation: Light-induced attenuation (LID), with an annual attenuation of less than 1% and an average annual attenuation of approximately 0.4%.
3. Excellent temperature coefficient: -0.30%/°C to -0.35%/°C, with superior performance at high temperatures compared to PERC.
4. Compatibility: It can continue to use PERC devices, and the upgrade cost is lower than that of HJT.
B. Challenge
1. Silver paste consumption: The cost of silver paste on the back is relatively high, and it is necessary to promote silver-coated copper or copper electroplating technology.
2. Process control: The uniformity of the ultra-thin SiO₂ layer is strictly required.
3. Efficiency bottleneck: After approaching the theoretical limit, it needs to be combined with BC (back contact) or perovskite tandem.
C. Future Development Direction
1. Stacked technology: Topcon, as the underlying battery, is stacked with perovskite, and the theoretical efficiency can exceed 30%.
2. Equipment optimization: Enhance the production capacity and yield of LPCVD and reduce the cost of Poly-Si deposition.
3. Silver-free: Develop low-cost metallization solutions to replace silver paste.
Qinhuangdao Shuogu Photovoltaic Science&Technology Co., Ltd. is established in 2014 and specializing in R&D and production of solar module production line equipment.
The specialized Laminator for BIPV Module produced by Qinhuangdao Shuogu can not only produce BIPV modules suitable for building-integrated photovoltaics, but also produce high-quality conventional solar panels such as crystalline silicon, polycrystalline silicon, and thin-film cells. At present, the equipment has been put into production and has received unanimous praise from customers.
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