Light Trapping by a Dielectric Nanoparticle Back Reflector in Film Silicon Solar Cells

Benjamin G. Lee, Paul Stradins, David L. Young, Kirstin Alberi, Ta Ko Chuang, J. Gregory Couillard, Howard M. Branz

Research output: Contribution to journalArticlepeer-review

36 Scopus Citations

Abstract

Drop-coated high-refractive-index nanoparticles used as a back reflector for thin-film solar cells are non-absorbing Mie-scatterers that enhance light trapping. We present optical measurements and theory for this approach. A 40% enhancement of the photocurrent and efficiency of a 2.5 μm thick single-crystal Si solar cell on display glass is achieved by adding a back reflector of 270 nm rutile TiO 2 nanoparticles.

Original languageAmerican English
Article number064101
Number of pages3
JournalApplied Physics Letters
Volume99
Issue number6
DOIs
StatePublished - 8 Aug 2011

NREL Publication Number

  • NREL/JA-5200-50873

Keywords

  • light trapping
  • silicon solar cells

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