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TiO₂-coated carbon nanotube-silicon solar cells with efficiency of 15%.

ABSTRACT: Combining carbon nanotubes (CNTs), graphene or conducting polymers with conventional silicon wafers leads to promising solar cell architectures with rapidly improved power conversion efficiency until recently. Here, we report CNT-Si junction solar cells with efficiencies reaching 15% by coating a TiO₂ antireflection layer and doping CNTs with oxidative chemicals, under air mass (AM 1.5) illumination at a calibrated intensity of 100 mW/cm² and an active device area of 15 mm². The TiO₂ layer significantly inhibits light reflectance from the Si surface, resulting in much enhanced short-circuit current (by 30%) and external quantum efficiency. Our method is simple, well-controlled, and very effective in boosting the performance of CNT-Si solar cells.

SUBMITTER: Shi E

PROVIDER: S-EPMC3504926 | biostudies-literature |

REPOSITORIES: biostudies-literature

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