Absorption enhancement in ultrathin crystalline silicon solar cells with antireflection and light-trapping nanocone gratings.

  title={Absorption enhancement in ultrathin crystalline silicon solar cells with antireflection and light-trapping nanocone gratings.},
  author={Ken Xingze Wang and Zongfu Yu and Victor Liu and Yi Cui and Shanhui Fan},
  journal={Nano letters},
  volume={12 3},
Enhancing the light absorption in ultrathin-film silicon solar cells is important for improving efficiency and reducing cost. We introduce a double-sided grating design, where the front and back surfaces of the cell are separately optimized for antireflection and light trapping, respectively. The optimized structure yields a photocurrent of 34.6 mA/cm(2) at an equivalent thickness of 2 μm, close to the Yablonovitch limit. This approach is applicable to various thicknesses and is robust against… CONTINUE READING
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