Targray - Solar Silicon Wafers for c-Si Solar Cells
Targray offers a full range of solar silicon wafers for solar cell production. Through our extensive global partner network, we have access to a reliable supply of high quality solar wafers to support both your short and long term product requirements. Our high quality solar silicon wafers can be manufactured to your exact specifications, with custom options for thickness, geometry, bevel edge and more. Working with our suppliers and trade associations like SEIA we help PV manufacturers increase their product efficiency while also minimizing soft costs. Our solar wafers are supported by a range of supply chain finance and inventory management programs designed to optimize material procurement.
Currently available standard sizes are:
- Monocrystalline solar wafers: 156.75 x 156.75 mm
- Multicrystalline solar wafers: 156.75 x 156.75 mm
The Targray Solar Division is committed to helping photovoltaics manufacturers worldwide reduce their overall Cost/Wt. This begins with sourcing the highest quality solar wafers for solar cell fabrication and processing. Superior solar wafers will yield more efficient PV solar cells. The below table provides sample specifications for our latest line of solar silicon wafers.
- Conductivity Type : p-type / B dopant
- Length of Side : Square 156.75 ± 0.25mm
- Resistivity : 1 – 3 Ω-cm
- Lifetime : ≥ 5.2 μs
- Oxygen Concentration : ≤ 5.0E17 atoms/cm3
- Carbon Concentration : ≤ 5.0E17 atoms/cm3
- Thickness : 200 μm ± 20 μm
- TTV : ≤ 30 μm
- BOW : ≤ 100 μm; ≤ 50 μm
- Saw Marks : ≤ 15.0 μm
- Chips : L ≤ 0.5 mm, D ≤ 0.3 mm, No more than 1 per wafer.
- Crystal Structure : Monocrystalline
- Crystal Growth Method : Czochralski
- Surface Crystal Orientation : <100> ± 3o
- Conductivity Type : P-type
- Dopant : Boron
- Resistivity : 1-3 : Ω – cm (After anneal)
- Minority Carrier Lifetime : ≥20 μsec
- Oxygen Concentration : ≤9E + 17 atoms/cm3
- Carbon Concentration : ≤5E + 16 atoms/cm3
- Wafer Thickness : 180 ± 20 μm
- Wafer Length : 156.75 mm
- Diagonal Length : 156.75
- Angle Between Adjacent Sides
- 90o ± 0.3o
- TTV : ≤ 30 μm
- BOW : ≤ 50 μm
- Saw Marks : ≤ 15 μm