Production method of solar energy level polysilicon ingot with crystalline grains arranged regularly
A technology of solar energy level and production method, which is applied in the field of crystalline silicon manufacturing, can solve problems affecting the photoelectric conversion efficiency and life of crystalline silicon solar cells, affecting the performance of photovoltaic devices, and reducing the diffusion length of minority carriers, so as to reduce the probability of cracking and increase Productivity and the effect of improving the lifespan of the few births
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[0026] Example 1
[0027] A silicon ingot furnace is used to produce 500 kg ingots, and a square flat-bottomed quartz crucible is used as a container for crystal growth. The accommodating size of the quartz crucible is 840mm (length) × 840mm (width) × 480mm (height). Place the seed layer on the bottom plane of the crucible, such as figure 2 As shown, the seed crystal layer consists of 49 seed crystals of 115mm (length) × 115mm (width) × 30mm (height) closely arranged, and any two adjacent seed crystals are respectively "+ type seed crystals" ( figure 2 Hit "+" sign) and "×-type seed crystal" ( figure 2 Mark “×” in the middle), the angle between the crystal directions of two adjacent seed crystals along the normal direction of the splicing surface (namely the contact surface) (also called the crystal direction included angle) is 45±3°, all seeds The crystal orientation of the crystal along the normal direction of the bottom plane of the crucible (that is, the crystal orientatio...
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