Lecture3A_What2Look4InASolarCell

Lecture3A_What2Look4InASolarCell - PhysicsofaSolarCell

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Physics of a Solar Cell –What to pay attention to as we develop the models from elementary solid state physics. Step 1: Light hitting the solar cell Reflection: Anti reflection coatings (alternating dielectric layers) Texturing to increase number of g bounces before reflecting (works against surface recombination) Wavelength of light (energy content er photon) per photon) Angle of incidence Cover glass/module optics Full metal back coverage can be used to give non absorbed photons a “second chance” but the metal also creates strong points for electron ole air recombination hole pair recombination
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Physics of a Solar Cell –What to pay attention to as we develop the models from elementary solid state physics. Step 2: Absorbing Light and generating carriers Energy bandgap: Determines which photons get absorbed and how soon Direct vs. indirect bandgaps determine how thick the device has to be (thicker absorbs more htbt thinner tends to
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This note was uploaded on 08/23/2011 for the course ECE 4833 taught by Professor Doolittle during the Spring '10 term at Georgia Tech.

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Lecture3A_What2Look4InASolarCell - PhysicsofaSolarCell

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