Why silicon wafers are made in watts! There are several specifications for silicon wafers!
Battery specifications good variety:103*103mm125*125mm150*150mm156*156mmThe longest seen is the single crystal 125*125mm polycrystalline 156*156mm according to the efficiency to determine the current efficiency of the battery chip is 16%--19%
A - (Si) amorphous silicon cells usually use high frequency glow discharge method to decompose the silane gas. Due to the low deposition temperature, the film can be deposited on glass, stainless steel plate, ceramic plate and flexible plastic sheet with a thickness of about 1 m, which is easy to large area (05rn * l.0m), and the cost is low. The structure of P in is adopted. In order to improve the efficiency and improve the stability, sometimes also made of three layers of P in multilayer laminated structure, or insert some transition layer. Its commercial production continued to grow, with an annual output capacity of 45MW / A, 10MW production line has been put into production, the global market volume of about 10 million per month, ranking first in the thin film battery. The development of integrated a - Si solar battery components, the use of the effective area of laser cutting is more than 90%, small area conversion efficiency increased to 14.6%, a large production of 8 to 10%, the highest efficiency of the laminated structure is 21%. Research and development trend is to improve the characteristics of the film, the precise design of photocell structure and control the thickness of each layer, improve the interface between the layers of state, in order to achieve high efficiency and high stability.
Crystalline silicon photovoltaic cells have two types of monocrystalline silicon and polycrystalline silicon, with P (or n) silicon substrate, through the formation of phosphorus (or boron) diffusion Pn formation, production technology is mature, is the leading product in the photovoltaic market. The buried layer electrode, surface passivation, enhanced light trapping, dense grid technology, optimization of back electrode and contact electrode technology, improve the collection efficiency of carrier materials, optimization of anti elbow membrane, concave convex surface, high reflective back electrode, the photoelectric conversion efficiency is greatly improved. Silicon photocell area is limited, the larger the phi 10 to 20cm wafer, the annual production capacity of 46MW/a. At present, the main task is to continue to expand the scale of the industry, the development of ribbon silicon photovoltaic technology, improve material utilization. Internationally recognized as the highest efficiency under AM1.5 conditions of 24%, the space with high quality efficiency in the AMO condition is about 13.5 - 18% of the ground with a large number of production in the AM1 conditions in the more than 11 - 18%. It can reduce the cost, but the efficiency is lower, which is made by the method of directional solidification. Optimization of the silver electrode and aluminum paste screen printing, grinding and polishing process, do everything possible to further reduce costs, improve efficiency, the maximum conversion efficiency of polycrystalline silicon photovoltaic cells up to 18.6%.
Including single crystal 125*125 150 single crystal 125*125 165 single crystal 156*156 diagonal diagonal 200 diagonal polycrystalline 125*125 polycrystalline 156*156 crystal silicon solar cell crystal silicon solar cell with monocrystalline silicon and polycrystalline silicon two categories, with P (or n) silicon substrate by phosphorus (or boron diffusion) to form Pn form production, production technology is mature, is the dominant photovoltaic products on the market. The buried layer electrode, surface passivation, enhanced light trapping, dense grid technology, optimization of back electrode and contact electrode technology, improve the collection efficiency of carrier materials, optimization of anti elbow membrane, concave convex surface, high reflective back electrode, the photoelectric conversion efficiency is greatly improved.
