Ralph Rothemund, Thomas Umundum, Gerald Meinhardt, Kurt Hingerl, Thomas Fromherz and Wolfgang Jantsch Light trapping in pyramidally textured crystalline silicon solar cells using back-side diffractive gratings Progress in Photovoltaics: Research and Applications 21
We present a three-dimensional optical model for the investigation of back-side diffractive gratings for pyramidally textured solar cells. Optimized back-side gratings increase the absorption inside a solar cell by improved light trapping. For a 180-µm-thick crystalline silicon solar cell, the optical model predicts an increase of the short-circuit current density by 1.8 mA/cm2 corresponding to an increase in efficiency by 0.9% absolute.
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