Limiting efficiencies over 50% using multijunction solar cells with multiple exciton generation

Jongwon Lee, Christiana Honsberg

Research output: Chapter in Book/Report/Conference proceedingConference contribution

3 Scopus citations

Abstract

The achievement of solar cells over 50% is a critical goal for photovoltaics. Multijunction solar cells over 5 junctions allow such efficiencies, but are severely limited by material constraints and growth requirements for lattice matching. Nanostructured approaches such as multiple exciton generation (MEG) potentially offer a route to higher efficiency but still require high values of sunlight concentration and large quantum yields. We show an approach that allows for higher efficiencies based on including MEG in a multijunction solar cell. We also present a thermodynamic model for multijunction solar cells with MEG that demonstrates possible improvements.

Original languageEnglish (US)
Title of host publicationProgram - 38th IEEE Photovoltaic Specialists Conference, PVSC 2012
Pages62-67
Number of pages6
DOIs
StatePublished - Nov 26 2012
Event38th IEEE Photovoltaic Specialists Conference, PVSC 2012 - Austin, TX, United States
Duration: Jun 3 2012Jun 8 2012

Publication series

NameConference Record of the IEEE Photovoltaic Specialists Conference
ISSN (Print)0160-8371

Other

Other38th IEEE Photovoltaic Specialists Conference, PVSC 2012
CountryUnited States
CityAustin, TX
Period6/3/126/8/12

Keywords

  • detailed balance
  • efficiency
  • multijunction
  • multiple exciton generation
  • tandem
  • thermodynamic limit

ASJC Scopus subject areas

  • Control and Systems Engineering
  • Industrial and Manufacturing Engineering
  • Electrical and Electronic Engineering

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  • Cite this

    Lee, J., & Honsberg, C. (2012). Limiting efficiencies over 50% using multijunction solar cells with multiple exciton generation. In Program - 38th IEEE Photovoltaic Specialists Conference, PVSC 2012 (pp. 62-67). [6317569] (Conference Record of the IEEE Photovoltaic Specialists Conference). https://doi.org/10.1109/PVSC.2012.6317569