#Solarcell ppt free#
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Principle of operation similar to multiband cells.Intermediate band formed by impurity levels.Many E-H pairs created by incident photon through.GaInP/GaAs/Ge tandem cells (efficiency 40).Ideal efficiency for infinite stack is 86.8.Current output matched for individual cells.2 and 3 Junction and contact voltage loss.p-diamond (Bandgap 5.5 eV) as a window layer.Poor contact quality with p-CdTe ( 0.1 Wcm2).CdS Bandgap 2.5 eV Acts as window layer.CdTe Bandgap 1.5 eV Absorption coefficient 10.Produced from cheaper polycrystalline materials.Surface damage due to high temperature in.Cheap and easy alternative to traditional cell.
Electrons are repelled by p-p junction field.Most carriers are generated in thicker p region.Operating diode in fourth quadrant generates power.Atmosphere can cut solar energy reaching earth by.Amount of air mass through which light pass.
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