Abstract

The effects of luminescence coupling on the external quantum efficiency (EQE) measurement of an InGaP/InGaAs/Ge triple junction solar cell were investigated. A small signal model was used to study the interaction of the subcells during EQE measurement. It was found that an optical-electrical feedback mechanism results in EQE measurement artifacts. Measurements of luminescence from the InGaP p-n junction are also performed to quantitatively determine the strength of the luminescence coupling. These results offer a more thorough and comprehensive interpretation of EQE measurement results that are needed for the design and accurate performance evaluation of high-efficiency multijunction solar cells. The effects demonstrated here can also be used to measure the spontaneous emission efficiency of the subcells, which is useful for nondestructive assessment of multijunction solar cell material quality.

Original languageEnglish (US)
Pages (from-to)344-350
Number of pages7
JournalProgress in Photovoltaics: Research and Applications
Volume21
Issue number3
DOIs
StatePublished - May 2013

Fingerprint

Quantum efficiency
Luminescence
quantum efficiency
solar cells
luminescence
Spontaneous emission
p-n junctions
spontaneous emission
artifacts
Solar cells
Multi-junction solar cells
Feedback
evaluation
interactions

Keywords

  • electroluminescence
  • EQE, quantum efficiency
  • GaAs, GaInP, Ge
  • luminescence coupling, photon coupling, optical coupling
  • measurement artifact
  • multi-junction
  • photoluminescence
  • small signal analysis

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Electrical and Electronic Engineering
  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Cite this

Luminescence coupling effects on multijunction solar cell external quantum efficiency measurement. / Lim, Swee Hoe; Li, Jing Jing; Steenbergen, Elizabeth H.; Zhang, Yong-Hang.

In: Progress in Photovoltaics: Research and Applications, Vol. 21, No. 3, 05.2013, p. 344-350.

Research output: Contribution to journalArticle

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abstract = "The effects of luminescence coupling on the external quantum efficiency (EQE) measurement of an InGaP/InGaAs/Ge triple junction solar cell were investigated. A small signal model was used to study the interaction of the subcells during EQE measurement. It was found that an optical-electrical feedback mechanism results in EQE measurement artifacts. Measurements of luminescence from the InGaP p-n junction are also performed to quantitatively determine the strength of the luminescence coupling. These results offer a more thorough and comprehensive interpretation of EQE measurement results that are needed for the design and accurate performance evaluation of high-efficiency multijunction solar cells. The effects demonstrated here can also be used to measure the spontaneous emission efficiency of the subcells, which is useful for nondestructive assessment of multijunction solar cell material quality.",
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AB - The effects of luminescence coupling on the external quantum efficiency (EQE) measurement of an InGaP/InGaAs/Ge triple junction solar cell were investigated. A small signal model was used to study the interaction of the subcells during EQE measurement. It was found that an optical-electrical feedback mechanism results in EQE measurement artifacts. Measurements of luminescence from the InGaP p-n junction are also performed to quantitatively determine the strength of the luminescence coupling. These results offer a more thorough and comprehensive interpretation of EQE measurement results that are needed for the design and accurate performance evaluation of high-efficiency multijunction solar cells. The effects demonstrated here can also be used to measure the spontaneous emission efficiency of the subcells, which is useful for nondestructive assessment of multijunction solar cell material quality.

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