Polaris solar PV net news: since PERC technologies become more available, single crystal polycrystalline solar products continue to threaten the city. Polycrystalline silicon manufacturers thus began to focus on black technology, trying to improve diamond wire cutting through black silicon wafer cell conversion efficiency can be easily reduced problems for large capacity of polycrystalline looking for new market opportunities.
Compared with the traditional sand cut polycrystalline, diamond wire cutting faster, cut wafer quality more stable, each wafer can reduce the cost 6~10 cents. But cut polycrystalline diamond line surface is too smooth, make solar easy reflection that cannot be absorbed by the battery, it will reduce the efficiency. Must be dealt with for surface texturing, one technology is called black silicon with high visibility.
Two types, the three processes
Black Silicon is returned along with the diamond wire cutting wafer of existing technology. In 2016, many manufacturers have already started research on black silicon, BYD, a Chinese solar, ja, Crystal, and other first-tier companies, Kyocera and some plants are included.
Black Silicon is mainly divided into dry and wet method two, with many categories. At present, the main black market silicon technologies have dry, wet, three categories of additives; additive is a kind of wet, but there is no standard of silver nitrate solution used wet. Three main differences are as follows:
Consideration to the current technological development and equipment costs, and so on, EnergyTrend analysts think 2017 black silicon technology has gradually additive technology convergence and dry still has room to continue development. Contrast, wet method of silver nitrate solution used by environmental concerns, is relatively unfavourable characteristics. In addition, wet on the efficiency than dry, than in terms of reducing additives, which still need to examine how.
Main competitors for single crystal
Black Silicon polycrystalline cells stacked PERC technology about conversion efficiency to 19~20%; and the cost reduced with diamond wire cutting, price/performance was a direct challenge to General status of single crystals. Plus Crystal limited wafer capacity than adequate, it is difficult to flip the market share of polycrystalline, is also open for black polycrystalline silicon of price/performance space in the market.
While single PERC will be in 2017, as technologies mature and move into mainstream markets for efficient products and that many firms actively expanding production, market demand is also rising in the know.
EnergyTrend Analyst estimates, black silicon technology in 2017 will be clear in the first half, and in 2017, entered mass production in the second half. Market reaction to black Silicon polycrystalline cells, will be around for future development of black Silicon.
Original title: Crystal Black routes clear poly silicon technology challenges