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Department of Aeronautics and Astronautics NCKU Nano and MEMS Technology LAB. 1 Chapter VIIIa Microcrystalline Silicon Solar Cells June 21, 2015June 21, 2015June 21, 2015
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Department of Aeronautics and Astronautics NCKU Nano and MEMS Technology LAB. 2
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Department of Aeronautics and Astronautics NCKU Nano and MEMS Technology LAB. 4
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Department of Aeronautics and Astronautics NCKU Nano and MEMS Technology LAB. 5 10~20nm nanocrystals
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Department of Aeronautics and Astronautics NCKU Nano and MEMS Technology LAB. 6 Increasing in silane concentration
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Department of Aeronautics and Astronautics NCKU Nano and MEMS Technology LAB. 10 Optical properties Urbach tail
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Department of Aeronautics and Astronautics NCKU Nano and MEMS Technology LAB. 11 Electronic Transport Properties
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Department of Aeronautics and Astronautics NCKU Nano and MEMS Technology LAB. 12 I c /(I c + I a )
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Department of Aeronautics and Astronautics NCKU Nano and MEMS Technology LAB. 13 Doped Layers
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Department of Aeronautics and Astronautics NCKU Nano and MEMS Technology LAB. 14 Requires a much longer growth time than a-Si:H. Difference between a-Si:H and mc-Si:H
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Department of Aeronautics and Astronautics NCKU Nano and MEMS Technology LAB. 21 Optimization of TCO
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Department of Aeronautics and Astronautics NCKU Nano and MEMS Technology LAB. 25 Increase in defect density in i layer
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Department of Aeronautics and Astronautics NCKU Nano and MEMS Technology LAB. 26
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Department of Aeronautics and Astronautics NCKU Nano and MEMS Technology LAB. 27 Effect of Oxygen or Dopant contamination on the I layer
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Department of Aeronautics and Astronautics NCKU Nano and MEMS Technology LAB. 28 Efficiency of a micromorph
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Department of Aeronautics and Astronautics NCKU Nano and MEMS Technology LAB. 29 Micromorph Tandem Solar Cell
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Department of Aeronautics and Astronautics NCKU Nano and MEMS Technology LAB. 30 To cope with the degradation of top cell, one can design a cell where the J sc is lower in the microcrystalline bottom cell than in the amorphous top cell.
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Department of Aeronautics and Astronautics NCKU Nano and MEMS Technology LAB. 31
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Department of Aeronautics and Astronautics NCKU Nano and MEMS Technology LAB. 32 Or one can design a thinner top cell to reduce the degradation effect, but adding ZnO layer in between to increase light trapping of the top cell and increase J sc.
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