On the ultra-miniaturization of concentrator solar cells

Alexis Vossier, Baruch Hirsch, Eugene A. Katz, Jeffrey M. Gordon

Research output: Contribution to journalArticlepeer-review


The trend of cell miniaturization in concentrator photovoltaics (CPV) currently in mm-scale and motivated by efficiency improvements linked to reduced series resistance begs the question whether fundamental energetic considerations limit ultra-miniaturization. Mitigating factors subsume the busbars and metallization grid, the contributions of which embody subtle tradeoffs and vary non-trivially as cell size is reduced evaluated via a distributed circuit simulation model, with some supporting experimental evidence. Concurrently, the influence of cell size on how metal grid design can lower series resistance is assessed, prompted by micro-concentrators that completely eliminate grid shadowing and allow far greater metallization coverage.

Original languageEnglish
Pages (from-to)1188-1192
Number of pages5
JournalSolar Energy Materials and Solar Cells
Issue number4
StatePublished - Apr 2011
Externally publishedYes


  • Concentrator
  • Metallization
  • Miniaturization
  • Multijunction
  • Photovoltaics
  • Solar


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