Blog
About

  • Record: found
  • Abstract: not found
  • Article: not found

Improved red-response in thin film a-Si:H solar cells with soft-imprinted plasmonic back reflectors

Read this article at

ScienceOpenPublisher
Bookmark
      There is no author summary for this article yet. Authors can add summaries to their articles on ScienceOpen to make them more accessible to a non-specialist audience.

      Related collections

      Most cited references 18

      • Record: found
      • Abstract: found
      • Article: not found

      Optical properties of metallic films for vertical-cavity optoelectronic devices.

      We present models for the optical functions of 11 metals used as mirrors and contacts in optoelectronic and optical devices: noble metals (Ag, Au, Cu), aluminum, beryllium, and transition metals (Cr, Ni, Pd, Pt, Ti, W). We used two simple phenomenological models, the Lorentz-Drude (LD) and the Brendel-Bormann (BB), to interpret both the free-electron and the interband parts of the dielectric response of metals in a wide spectral range from 0.1 to 6 eV. Our results show that the BB model was needed to describe appropriately the interband absorption in noble metals, while for Al, Be, and the transition metals both models exhibit good agreement with the experimental data. A comparison with measurements on surface normal structures confirmed that the reflectance and the phase change on reflection from semiconductor-metal interfaces (including the case of metallic multilayers) can be accurately described by use of the proposed models for the optical functions of metallic films and the matrix method for multilayer calculations.
        Bookmark
        • Record: found
        • Abstract: found
        • Article: not found

        Plasmonic nanostructure design for efficient light coupling into solar cells.

        We demonstrate that subwavelength scatterers can couple sunlight into guided modes in thin film Si and GaAs plasmonic solar cells whose back interface is coated with a corrugated metal film. Using numerical simulations, we find that incoupling of sunlight is remarkably insensitive to incident angle, and that the spectral features of the coupling efficiency originate from several different resonant phenomena. The incoupling cross section can be spectrally tuned and enhanced through modification of the scatterer shape, semiconductor film thickness, and materials choice. We demonstrate that, for example, a single 100 nm wide groove under a 200 nm Si thin film can enhance absorption by a factor of 2.5 over a 10 microm area for the portion of the solar spectrum near the Si band gap. These findings show promise for the design of ultrathin solar cells that exhibit enhanced absorption.
          Bookmark
          • Record: found
          • Abstract: not found
          • Article: not found

          TCO and light trapping in silicon thin film solar cells

            Bookmark

            Author and article information

            Journal
            Applied Physics Letters
            Appl. Phys. Lett.
            AIP Publishing
            0003-6951
            1077-3118
            November 02 2009
            November 02 2009
            : 95
            : 18
            : 183503
            10.1063/1.3256187
            © 2009
            Product

            Comments

            Comment on this article