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New Generation Silicon Solar Cells

2.2 Metal – Isolator – Semiconductor

New Generation Silicon Solar Cells

Metal:

either the conduction band is partly filled

or no seperate conduction and valence    band exist

electrons can move freely

T ↑ resistivity

electrons give their energy to the phonons

 very fast ~ 10-12s

Isolator:

at T = 0 the conduction band is empty very high resistivity

band gap EG > 3eV

no conductivity despite doping possible

Band structure

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