A kind of preparation method of p-type crystalline silicon back electrode
A back electrode and crystalline silicon technology, applied in the field of solar cells, can solve the problems of increasing the cost of the back electrode paste, affecting the welding performance of the back electrode, increasing the width of the back electrode, etc., to improve the field passivation characteristics, improve the photoelectric conversion efficiency, Effect of Reducing Leakage Current
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Embodiment 1
[0028] 1. Preparation of Linear Interlayer-Glass Paste
[0029] Preparation of bismuth-boron-zinc-vanadium system glass powder: take the weight of bismuth-boron-zinc-vanadium system glass powder as 100%, take by weight 25% bismuth oxide, 20% boron oxide, 20% by weight of zinc oxide, 27% by weight of vanadium oxide, 6% by weight of strontium carbonate and 2% by weight of gallium oxide, and then using a known mixer such as a disperser or a three-roller Mix all the materials evenly, then carry out drying treatment for 3.5 hours, then transfer the dried raw materials to the crucible, then place the crucible containing the raw materials in the heating chamber, first raise the temperature to 950°C, then keep it warm for 1.5 hours, and then put the The smelted feed liquid passes through cooling rollers to obtain bismuth-boron-zinc-vanadium system glass powder, and then the bismuth-boron-zinc-vanadium system glass powder is crushed and sieved to obtain the median particle size D 50 I...
Embodiment 2
[0045] 1. Preparation of Linear Interlayer-Glass Paste
[0046] The preparation of bismuth-boron-zinc-vanadium system glass powder: take the weight of bismuth-boron-zinc-vanadium system glass powder as 100%, take by weight the bismuth oxide which is 40% by weight, the boron oxide which is 15% by weight, 15% by weight of zinc oxide, 24% by weight of vanadium oxide and 6% by weight of strontium carbonate, then utilize known mixers such as dispersers or three-rollers to mix the materials evenly, and then dry Treat for 4 hours, then transfer the dried raw materials to the crucible, then place the crucible containing the raw materials in the heating chamber, first raise the temperature to 1050 ° C, then keep it warm for 2 hours, and then pass the smelted material liquid through cooling rollers to obtain bismuth - boron-zinc-vanadium system glass powder, then crush and sieve the bismuth-boron-zinc-vanadium system glass powder to obtain the median particle size D 50 It is a bismuth-...
Embodiment 3
[0062] 1. Preparation of Linear Interlayer-Glass Paste
[0063] The preparation of bismuth-boron-zinc-vanadium system glass powder: take the weight of bismuth-boron-zinc-vanadium system glass powder as 100%, take by weighing 10% by weight of bismuth oxide, 25% by weight of boron oxide, 21% by weight of zinc oxide, 32% by weight of vanadium oxide, 8% by weight of strontium carbonate and 4% by weight of gallium oxide, and then using a known mixer such as a disperser or a three-roller Mix all the materials evenly, then carry out drying treatment for 4 hours, then transfer the dried raw materials to the crucible, then place the crucible containing the raw materials in the heating chamber, first raise the temperature to 850°C, then keep it warm for 2 hours, and then complete the melting The feed liquid is passed through the cooling roll to obtain the bismuth-boron-zinc-vanadium system glass powder, and then the bismuth-boron-zinc-vanadium system glass powder is crushed and sieved t...
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