Efficient light-trapping nanostructures in thin silicon solar cells

  title={Efficient light-trapping nanostructures in thin silicon solar cells},
  author={Sang Eon Han and Anastassios Mavrokefalos and Matthew Sanders Branham and Gang Chen},
We examine light-trapping in thin crystalline silicon periodic nanostructures for solar cell applications. Using group theory, we show that light-trapping can be improved over a broad band when structural mirror symmetry is broken. This finding allows us to obtain surface nanostructures with an absorptance exceeding the Lambertian limit over a broad band at normal incidence. Further, we demonstrate that the absorptance of nanorod arrays with symmetry breaking not only exceeds the Lambertian… CONTINUE READING

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