Limiting efficiencies of multijunction solar cells with multiple exciton generation

Jongwon Lee, Christiana Honsberg

Research output: Contribution to journalArticle

2 Scopus citations

Abstract

The introduction of multiple exciton generation (MEG) processes with a low maximum quantum yield (QY) (maximum 200%) into a multijunction solar cell provides an efficiency increase up to 4.2% absolute for a triple-junction solar cell under concentration. In addition, the efficiency contour plots show increased flexibility in material choices, even for series connected devices. Importantly, the MEG QYs necessary to achieve these advantages are moderate and within experimental measured values, requiring no more than the generation of two electron hole pairs from a photon.

Original languageEnglish (US)
Article number6762878
Pages (from-to)874-880
Number of pages7
JournalIEEE Journal of Photovoltaics
Volume4
Issue number3
DOIs
StatePublished - May 2014

Keywords

  • Bandgap
  • detailed balance
  • efficiency
  • multijunction (MJ) solar cell
  • multiple exciton generation (MEG) solar cell
  • thermodynamic limit

ASJC Scopus subject areas

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

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