Abstract

The threshold energy (Eth) over 100% quantum yield (QY) is a key factor to determine the performance of multiple exciton generation (MEG) solar cells. By investigating non-idealities of MEG models, it is critical to consider non-idealities in Eth for the onset of MEG processes. Detailed balance calculations show that despite a large experimental emphasis on the maximum quantum yield, the threshold energy has a substantial and significant effect. The first effect is that at threshold energies between 2 and 3Eg (for one sun) or 3 and 4Eg for maximum concentration, even theoretical benefits of the MEG process disappear. Since measured values are within this range, this is an important effect to consider. The second effect is that the inclusion of non-ideal threshold energies increases the optimum band gap, moving to values consistent with silicon.

Original languageEnglish (US)
Title of host publicationConference Record of the IEEE Photovoltaic Specialists Conference
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages1050-1053
Number of pages4
ISBN (Print)9781479932993
DOIs
StatePublished - 2013
Event39th IEEE Photovoltaic Specialists Conference, PVSC 2013 - Tampa, FL, United States
Duration: Jun 16 2013Jun 21 2013

Other

Other39th IEEE Photovoltaic Specialists Conference, PVSC 2013
CountryUnited States
CityTampa, FL
Period6/16/136/21/13

Fingerprint

Excitons
Solar cells
Quantum yield
Sun
Energy gap
Silicon

Keywords

  • Detailed balance calculations
  • Multiple exciton generation solar cells
  • Quantum yield
  • Thermodynamic limit
  • Threshold energy

ASJC Scopus subject areas

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

Cite this

Lee, J., & Honsberg, C. (2013). Impact of threshold energy of multiple exciton generation solar cells. In Conference Record of the IEEE Photovoltaic Specialists Conference (pp. 1050-1053). [6744321] Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/PVSC.2013.6744321

Impact of threshold energy of multiple exciton generation solar cells. / Lee, Jongwon; Honsberg, Christiana.

Conference Record of the IEEE Photovoltaic Specialists Conference. Institute of Electrical and Electronics Engineers Inc., 2013. p. 1050-1053 6744321.

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

Lee, J & Honsberg, C 2013, Impact of threshold energy of multiple exciton generation solar cells. in Conference Record of the IEEE Photovoltaic Specialists Conference., 6744321, Institute of Electrical and Electronics Engineers Inc., pp. 1050-1053, 39th IEEE Photovoltaic Specialists Conference, PVSC 2013, Tampa, FL, United States, 6/16/13. https://doi.org/10.1109/PVSC.2013.6744321
Lee J, Honsberg C. Impact of threshold energy of multiple exciton generation solar cells. In Conference Record of the IEEE Photovoltaic Specialists Conference. Institute of Electrical and Electronics Engineers Inc. 2013. p. 1050-1053. 6744321 https://doi.org/10.1109/PVSC.2013.6744321
Lee, Jongwon ; Honsberg, Christiana. / Impact of threshold energy of multiple exciton generation solar cells. Conference Record of the IEEE Photovoltaic Specialists Conference. Institute of Electrical and Electronics Engineers Inc., 2013. pp. 1050-1053
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