Limiting efficiencies of multijunction solar cells with multiple exciton generation

Jongwon Lee; Christiana Honsberg

doi:10.1109/JPHOTOV.2014.2307156

Limiting efficiencies of multijunction solar cells with multiple exciton generation

Jongwon Lee, Christiana Honsberg

Research output: Contribution to journal › Article › peer-review

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 language	English (US)
Article number	6762878
Pages (from-to)	874-880
Number of pages	7
Journal	IEEE Journal of Photovoltaics
Volume	4
Issue number	3
DOIs	https://doi.org/10.1109/JPHOTOV.2014.2307156
State	Published - 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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10.1109/JPHOTOV.2014.2307156

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title = "Limiting efficiencies of multijunction solar cells with multiple exciton generation",

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.",

keywords = "Bandgap, detailed balance, efficiency, multijunction (MJ) solar cell, multiple exciton generation (MEG) solar cell, thermodynamic limit",

author = "Jongwon Lee and Christiana Honsberg",

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AB - 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.

KW - Bandgap

KW - detailed balance

KW - efficiency

KW - multijunction (MJ) solar cell

KW - multiple exciton generation (MEG) solar cell

KW - thermodynamic limit

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Limiting efficiencies of multijunction solar cells with multiple exciton generation

Abstract

Keywords

ASJC Scopus subject areas

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