What is the difference between the properties of monocrystalline and polycrystalline silicon?
Monocrystalline silicon:
Excellent electrical properties and high carrier mobility.
Good mechanical properties and high strength.
Uniform optical properties, suitable for high precision optical applications.

Polycrystalline silicon:
Poor electrical properties, grain boundaries affect carrier migration.
Mechanical properties are low, with grain boundaries causing strength loss.
Uneven optical properties with grain boundaries and defects.

Highly Recommended Silicon from Yutai Optics:
IR Silicon
Optical Plano Silicon Windows
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Silicon IR Longpass Filters
Silicon Blanks