External light trapping for solar cells

Ido Frenkel, Shilpi Shital, Avi Niv

Research output: Contribution to journalArticlepeer-review

1 Scopus citations


We use nonimaging, statistical-ray optics and ray-tracing simulations to study external light traps as a cost-effective means to enhance the absorption of optically imperfect solar cells. Our main finding is that the optical performance of a cell may be compromised substantially without affecting its overall performance if a trap is being used. As a result, simpler cell construction that gives better charge-transport abilities may be considered. As a case study, we show that the thickness of a silicon cell may be reduced to less than a micron without compromising its efficiency and that the efficiency of perovskite cell may increase substantially, almost up to its theoretical limit.

Original languageEnglish
Article number037002
JournalJournal of Photonics for Energy
Issue number3
StatePublished - 1 Jul 2020


  • light trapping
  • optics
  • perovskite
  • ray optics
  • solar energy

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Renewable Energy, Sustainability and the Environment


Dive into the research topics of 'External light trapping for solar cells'. Together they form a unique fingerprint.

Cite this