156*156mm polycrystalline solar cell,monocrystalline cell, pv solar panel supplier

We can provide you156*156mm polycrystalline solar cell,monocrystalline cell for home,commercial and industrial, etc.
Property
Specification
Crystal and material properties

Crystallinity
Multicrystalline
Conductivity type
P-type
Dopant
Boron
Specific resistance
1.0 - 3.0 Wcm; 90% within 1-1.8 ohm-cm
Crystal size
£ 10 crystals per cm²
Oxygen concentration
£ 9.8 x 10
17
atoms/cm³
Carbon concentration
£ 5 x 10
16
atoms/cm³
Effective minority
carrier lifetime
1: ³ 1 µs
2: Average > 3.5 µs
3: No lifetime dip > 3 µs
Geometry

Shape
Square with 45±10° chamfer at the corner
Length of wafer edge
156 +/- 0,5 mm Cpk≥1.33
Minimum square area covered
Min (d-0.5 mm)x(d-0.5 mm), Max (d+0.5 mm)x(d+0.5 mm)
Square area, outside of

which no part of the wafer

can extend

Bevel edge width
1.5 ± 0.5 mm
Average thickness
200 ± 20 µm with Cpk≥1.33
Total thickness variation TTV
≤50 µm with Cpk≥1.33
Warp/Bow
≤40 µm with Cpk≥1.33
Appearance

Edge defect (through wafer)
≤5 mm with ≤0.5 mm


Surface chipping
None above 0.2 mm wide and 0.1 mm deep


Saw marks
depth £ 20 µm
Saw marks (steps)
depth £ 15 µm
Cracks and pin holes
No visual cracks and

pin holes
Surface properties

Wafer slicing
Glycol based wafering
Wafer cleaning
Water + detergent
Wafer surface
As cut, no stains with the

exception of water stains

and stains of silicon dust
Packaging

Packaging method
Cardboard boxes packed

in cardboard cartons
Labelling on each
Date / Time, Ingot number,
cardboard boxes
Box number, Number of

wafers, Thickness
Labelling on each
Carton Number, Wafer
cardboard cartons
description, Article number

Number of wafers, Date
156*156mm polycrystalline solar cell