Combined effects of shunt and luminescence coupling on external quantum efficiency measurements of multijunction solar cells

Jing Jing Li, Swee Hoe Lim, Charles R. Allen, Ding Ding, Yong-Hang Zhang

Research output: Contribution to journalArticle

39 Scopus citations

Abstract

The combined effects of shunt and luminescence coupling on the measurement artifact of external quantum efficiency (EQE) of multi-junction solar cells are studied. The EQE measurement artifact is modeled using DC and small-signal equivalent circuits under voltage and light bias conditions. The modeling results are verified with EQE measurements of a Ge bottom cell of a triple-junction solar cell. It is found that the optimal bias light intensity to minimize the EQE measurement artifact is the result of the tradeoff between the shunt and the luminescence coupling effects.

Original languageEnglish (US)
Article number6087996
Pages (from-to)225-230
Number of pages6
JournalIEEE Journal of Photovoltaics
Volume1
Issue number2
DOIs
StatePublished - Dec 6 2011

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Keywords

  • Luminescence coupling
  • multi-junction solar cells
  • quantum efficiency
  • shunt

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering

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