Raw Material: Green Petroleum Coke, Green Needle Coke and High soft point pitch
Monocrystalline solar cells, crafted from high-purity silicon with a uniform crystal structure, deliver superior efficiency compared to polycrystalline counterparts.
We have carefully selected a batch of second-hand equipment of very good quality. Compared with new equipment, they have obvious price advantages and will not make much difference in use.
Include: Monocrystalline Batch Texturing Equipment, Batch Texturing Loader/Unloader,Low-Pressure Soft-Landing Closed-Tube Diffusion System…
Such as: Texturing, B diffusion, Oxidation, BSG（include atmatic), Alkali polishing（include atmatic), PE-POLY （include atmatic)…
Our company has a professional team and rich experience, and can provide you with the best service
Project strategy
Project proposal
Site selection plan
Feasible study report Project implement plan Safety production assessment
Civil structure and architecture
Clean room
Mechanic and HVAC
Process supply system
Ultra pure system
Electric and control
Environmental protection and safety
Material transportation planning
Secondary pipeline of process equipment
3D piping design
On-site erection & commissioning and first year operation.
First year Plant operation
Technology training
Monocrystalline cells are divided into P-type and N-type according to the doping type of silicon wafers. P-type silicon wafers are made by doping boron in silicon materials, while N-type silicon wafers are made by doping phosphorus in silicon materials.
| Aspect | PERC | TOPCon | HJT |
|---|---|---|---|
| Passivation | Al₂O₃/SiNx rear passivation | SiO₂ + poly-Si passivated contact | a-Si/c-Si heterojunction passivation |
| Key Process Steps | Front Side: Phosphorus diffusion to form the n+ emitter, followed by screen-printed silver grid lines. Rear Side: Deposits aluminum oxide (passivation layer) + silicon nitride (protective layer). Laser grooving (local contact) followed by aluminum back field printing. | Front Side: Similar to PERC (phosphorus diffusion + screen printing). Rear Side: Grows a 1-2 nm tunneling oxide layer (SiO₂). Deposits phosphorus-doped amorphous silicon, annealed to form n+ polysilicon layer. Coats with SiNx, then screen-prints electrodes. | Cleaning & Texturing: Double-sided texturing (requires extremely high cleanliness). Deposition: Deposits intrinsic amorphous silicon (i-a-Si) passivation layers on both sides. Deposits p-type a-Si on the front and n-type a-Si on the rear (forming the heterojunction). TCO (Transparent Conductive Oxide) Layer: Deposits ITO (Indium Tin Oxide) or similar materials. Metallization: Low-temperature silver paste + screen printing (or copper plating). |
| Metallization | High-temp silver paste (>700°C) | High-temp silver paste | Low-temp silver paste (<200°C) |
| Process Temp. | High (>800°C) | High (annealing >900°C) | Low (<200°C) |
| TCO Layer | Not required | Not required | Required (ITO, etc.) |
| Efficiency | ~24% | ~26% | ~27%+ |
| Cost | Lowest | Moderate | Highest (equipment + materials) |
Raw Material: Green Petroleum Coke, Green Needle Coke and High soft point pitch
Raw Ore: Sulfide Type Gold Ore Gold Grade: 3 g/t
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3000 TPD Gold Flotation Project in Shandong Province
2500TPD Lithium Ore Flotation in Sichuan
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Address: No.2555,Xiupu Road, Pudong, Shanghai
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