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      High efficiency thin upgraded metallurgical-grade silicon solar cells on flexible substrates.

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          Abstract

          We present a thin film (<20 μm) solar cell based on upgraded metallurgical-grade polycrystalline Si that utilizes silver nanoparticles atop silicon nanopillars created by block copolymer nanolithography to enhance light absorption and increase cell efficiency η > 8%. In addition, the solar cells are flexible and semitransparent so as to reduce balance of systems costs and open new applications for conformable solar cell arrays on a variety of surfaces. Detailed studies on the optical and electrical properties of the resulting solar cells suggest that both antireflective and light-trapping mechanisms are key to the enhanced efficiency.

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          Author and article information

          Journal
          Nano Lett
          Nano letters
          American Chemical Society (ACS)
          1530-6992
          1530-6984
          Oct 10 2012
          : 12
          : 10
          Affiliations
          [1 ] Department of Materials Science and Engineering, University of Michigan, Ann Arbor, MI, USA.
          Article
          10.1021/nl3020445
          22947134
          44cd5f53-85e7-45d1-85b8-f6a78131b88c
          History

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