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Imaging and modeling diffusion to defects in GaAs  Tim Gfroerer,Davidson College, Davidson, NC with Mark Wanlass, National Renewable Energy Lab, CO Diffusion.

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Presentation on theme: "Imaging and modeling diffusion to defects in GaAs  Tim Gfroerer,Davidson College, Davidson, NC with Mark Wanlass, National Renewable Energy Lab, CO Diffusion."— Presentation transcript:

1 Imaging and modeling diffusion to defects in GaAs  Tim Gfroerer,Davidson College, Davidson, NC with Mark Wanlass, National Renewable Energy Lab, CO Diffusion to defects impairs solar cell performance, but the impairment depends on the intensity of the incident light … + Low Excitation D Defect - diffusion length d Photoluminescence images centered on a defect in GaAs Modeling Results As the laser intensity is increased, photo-excited charge carriers recombine before reaching the defect. D - + High Excitation d

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