Upconverter silicon solar cell devices for efficient utilization of sub-band-gap photons under concentrated solar radiation

Stefan Fischer, Aruna Ivaturi, Benjamin Fröhlich, Marc Rüdiger, Armin Richter, Karl W. Kramer, Bryce S. Richards, Jan Christoph Goldschmidt

Research output: Contribution to journalArticle

27 Citations (Scopus)

Abstract

Upconversion (UC) of sub-band-gap photons has the potential to increase the efficiency of solar cells significantly. We realized an upconverter solar cell device, by attaching an upconverter layer of β-NaYF4 doped with 25% Er3+ embedded in the polymer perfluorocyclobutyl to the rear side of a bifacial silicon solar cell. We determined the external quantum efficiency of such upconverter solar cell devices under broad-band sub-band-gap excitation. Under consideration of spectral mismatch, we calculated the expected increase of the short-circuit current density due to UC under the air mass 1.5 global illumination. We determined an enhancement of 2.2 mA/cm2 for a spectral excitation band ranging from 1450 to 1600 nm and a comparatively low solar concentration of 78 suns. Subsequently, a system of concentrator lens and upconverter solar cell device was characterized with a solar simulator. We determined an increase of the short-circuit current density due to UC of sub-band-gap photons of 13.1 mA/cm2 under a concentration of 210 suns. This corresponds to a potential relative increase of the solar cell efficiency of 0.19%.

Original languageEnglish
Article number6626629
Pages (from-to)183-189
Number of pages7
JournalIEEE Journal of Photovoltaics
Volume4
Issue number1
DOIs
Publication statusPublished - 9 Oct 2013

Fingerprint

Silicon solar cells
solar radiation
Solar radiation
Solar cells
Energy gap
Photons
solar cells
photons
Short circuit currents
short circuit currents
Current density
current density
solar simulators
Quantum efficiency
air masses
concentrators
Lenses
Polymers
Lighting
Simulators

Keywords

  • optical frequency conversion
  • photovoltaic cells
  • silicon
  • spectral conversion
  • upconversion (UC)

Cite this

Fischer, Stefan ; Ivaturi, Aruna ; Fröhlich, Benjamin ; Rüdiger, Marc ; Richter, Armin ; Kramer, Karl W. ; Richards, Bryce S. ; Goldschmidt, Jan Christoph. / Upconverter silicon solar cell devices for efficient utilization of sub-band-gap photons under concentrated solar radiation. In: IEEE Journal of Photovoltaics. 2013 ; Vol. 4, No. 1. pp. 183-189.
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Fischer, S, Ivaturi, A, Fröhlich, B, Rüdiger, M, Richter, A, Kramer, KW, Richards, BS & Goldschmidt, JC 2013, 'Upconverter silicon solar cell devices for efficient utilization of sub-band-gap photons under concentrated solar radiation', IEEE Journal of Photovoltaics, vol. 4, no. 1, 6626629, pp. 183-189. https://doi.org/10.1109/JPHOTOV.2013.2282744

Upconverter silicon solar cell devices for efficient utilization of sub-band-gap photons under concentrated solar radiation. / Fischer, Stefan; Ivaturi, Aruna; Fröhlich, Benjamin; Rüdiger, Marc; Richter, Armin; Kramer, Karl W.; Richards, Bryce S.; Goldschmidt, Jan Christoph.

In: IEEE Journal of Photovoltaics, Vol. 4, No. 1, 6626629, 09.10.2013, p. 183-189.

Research output: Contribution to journalArticle

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AU - Kramer, Karl W.

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