Thermal field structure for casting polycrystalline silicon ingot
A polycrystalline silicon ingot and thermal field technology, which is applied in the directions of polycrystalline material growth, crystal growth, single crystal growth, etc., can solve the problems of low conversion efficiency and battery conversion efficiency, so as to improve conversion efficiency, reduce crystal defects, and suppress crystal The effect of defect generation
Inactive Publication Date: 2013-04-03
ALTUSVIA ENERGY TAICANG
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Abstract
The invention discloses a thermal field structure for casting a polycrystalline silicon ingot. The thermal field structure comprises a quartz crucible, thermal baffles, heaters, thermal insulating layers and a heat exchange table, wherein the quartz crucible is arranged on the heat exchange table, the thermal baffles are arranged at the periphery of the quartz crucible and are fixed at the bottoms of the side thermal insulating layers, the upper thermal insulating layer and the lower thermal insulating layer are respectively arranged above and below the quartz crucible, the side heaters are arranged between the thermal baffles and the side thermal insulating layers, and the upper heater is arranged between the upper thermal insulating layer and the quartz crucible. The thermal baffles added at the periphery of the quartz crucible enable a long crystal solid liquid interface to be always under the protection of the thermal baffles, reduce the thermal impact of the heaters on a crystal growth interface, and enable crystals to stably grow and inhibit the occurrence of crystal defects; and in the growth process of the crystals, the radiation of the heaters on a solidified silicon ingot is reduced, the latent heat of crystallization is facilitated to be transferred to the heat exchange tale through a solidification part, and the vertical growth of grains is facilitated, thus the conversion efficiency of a polycrystalline silicon solar cell can be effectively improved.
Application Domain
Polycrystalline material growthFrom frozen solutions +1
Technology Topic
Polycrystalline siliconSolar cell +11
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