Broadband near-field effects for improved thin film Si solar cells on randomly textured substrates

Lucia V. Mercaldo, Paola Delli Veneri, Iurie Usatii, Tiziana Polichetti

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12 Citations (Scopus)

Abstract

We show the superior performance in terms of light management of n-doped mixed phase silicon oxide in direct contact with Ag with respect to the established ZnO/Ag back reflector in thin film Si tandem solar cells on randomly textured substrates. Based on coexisting larger quantum efficiency and amplification of the optical Raman mode of Si, we propose that, in spite of a simple cell design, near-field concentrated light radiated at metal nanoprotrusions on the back interface is harvested. The effect is a remarkable 10% increase of the generated current density in the bottom cell, holding promise for significant conversion efficiency gain in matched devices. © 2013 Elsevier B.V.
Original languageEnglish
Pages (from-to)163 - 167
Number of pages5
JournalSolar Energy Materials and Solar Cells
Volume112
DOIs
Publication statusPublished - 2013

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All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Renewable Energy, Sustainability and the Environment
  • Surfaces, Coatings and Films

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