How to make high-efficiency, low-cost silicon solar cells has become the main research hotspot in the field of photovoltaic energy. Such as improving the quality of the matrix material; reducing the surface recombination to increase the lifetime of the minority, improve the photon utilization and the external quantum efficiency of the cell; reduce the silicon solar cell cost by reducing the silicon thickness. How to monitor the performance of the battery, monitor
Silicon solar cells are the mainstream of solar power technology, but the current large-scale commercial technology, the conversion efficiency is expected to be difficult to more than 23%. Industry and research units continue to actively develop a variety of technologies to break through the efficiency of the ceiling;Polycrystalline Solar Cells the latest public technology confirmed that solar cell efficiency can exceed 30%.
Sintering is the last key process of solar polycrystalline cell chip, which determines the efficiency and qualified rate of solar polycrystalline cell, and sintering furnace directly affects the success or failure of sintering process. This paper focuses on the analysis of the sintering furnace caused by sintering el bad phenomenon.
Polycrystalline Solar Cells production line is a dual-track production line, found in the production of a normal efficiency of the track, the other track the phenomenon of abnormal efficiency, or monorail production of normal, dual-track production abnormal phenomenon. It is suspected that the internal combustion of the sintering furnace in the double-track production is unstable and the sintering temperature is unstable,Polycrystalline Solar Cells resulting in abnormal sintering and low efficiency.
Aiming at the internal airflow problem in the sintering furnace, the air flow and the fresh air volume in the drying zone of the sintering furnace are adjusted.
Polycrystalline silicon solar cell production process and monocrystalline silicon solar cell almost, but the polysilicon solar cell photoelectric conversion efficiency will have to reduce a lot of its photoelectric conversion efficiency of about 12% (July 1, 2004 Japan Sharp market efficiency of 14.8% Of the world 's most efficient polysilicon solar cells). From the production cost, than the monocrystalline silicon solar cells to be cheaper, easy to manufacture materials, save power consumption, the total cost of production is low, so get a lot of development. In addition, the life of polysilicon solar cells than the monocrystalline silicon solar cells shorter.
Polysilicon solar cell production requires the consumption of a large number of high-purity silicon material, and the manufacture of these materials complex process, power consumption is large, in the total cost of solar cell production has exceeded one-half. Combined with the drawn single crystal silicon rod was cylindrical, sliced production of solar cells is also a wafer, composed of solar components,Polycrystalline Solar Cells low utilization of the plane. Therefore, since the 80s, some countries in Europe and America has invested in the development of polycrystalline silicon solar cells.