High efficiency thin upgraded metallurgical-grade silicon solar cells on flexible substrates.
basic_science · Level V
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- Record sourced from PubMed, PMID 22947134.
- Also identified by DOI 10.1021/nl3020445.
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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.