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

Stefan Fischer, Aruna Ivaturi, Benjamin Frohlich, Marc Rudiger, Armin Richter, Karl W Kramer, Bryce S Richards, Jan Christoph Goldschmidt

Research output: Contribution to journalArticle

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 beta-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/cm(2) 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/cm(2) under a concentration of 210 suns. This corresponds to a potential relative increase of the solar cell efficiency of 0.19%.

Original languageEnglish
Pages (from-to)183-189
Number of pages7
JournalIEEE Journal of Photovoltaics
Volume4
Issue number1
DOIs
Publication statusPublished - Jan 2014

Keywords

  • Optical frequency conversion
  • photovoltaic cells
  • silicon
  • spectral conversion
  • upconversion (UC)
  • CONVERSION

Cite this

Fischer, S., Ivaturi, A., Frohlich, B., Rudiger, M., Richter, A., Kramer, K. W., ... Goldschmidt, J. C. (2014). Upconverter silicon solar cell devices for efficient utilization of sub-band-gap photons under concentrated solar radiation. IEEE Journal of Photovoltaics, 4(1), 183-189. https://doi.org/10.1109/JPHOTOV.2013.2282744
Fischer, Stefan ; Ivaturi, Aruna ; Frohlich, Benjamin ; Rudiger, 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. 2014 ; Vol. 4, No. 1. pp. 183-189.
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Fischer, S, Ivaturi, A, Frohlich, B, Rudiger, M, Richter, A, Kramer, KW, Richards, BS & Goldschmidt, JC 2014, '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, 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; Frohlich, Benjamin; Rudiger, Marc; Richter, Armin; Kramer, Karl W; Richards, Bryce S; Goldschmidt, Jan Christoph.

In: IEEE Journal of Photovoltaics, Vol. 4, No. 1, 01.2014, p. 183-189.

Research output: Contribution to journalArticle

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AU - Ivaturi, Aruna

AU - Frohlich, Benjamin

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AU - Richter, Armin

AU - Kramer, Karl W

AU - Richards, Bryce S

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