ph8b01245_si_001.pdf (534.47 kB)
Plasmonically Enhanced Spectral Upconversion for Improved Performance of GaAs Solar Cells under Nonconcentrated Solar Illumination
journal contribution
posted on 2018-10-11, 00:00 authored by Huandong Chen, Sung-Min Lee, Angelo Montenegro, Dongseok Kang, Boju Gai, Haneol Lim, Chayan Dutta, Wanting He, Minjoo Larry Lee, Alexander Benderskii, Jongseung YoonSpectral
upconversion has the potential to compensate for sub-bandgap
transparency of single-junction solar cells. Here a composite module
of GaAs solar cells is presented that can improve their one-Sun photovoltaic
performance by capturing long-wavelength photons below the bandgap
via plasmonically enhanced spectral upconversion. Ultrathin, microscale
GaAs solar cells released from the growth wafer and etched with a
bottom contact layer are printed on a polymeric waveguide containing
NaYF4:Er3+, Yb3+ upconversion nanocrystals
(UCNC), coated on a plasmonic reflector composed of hole-post hybrid
silver nanostructure. The photovoltaic efficiency of GaAs microcells
on a UCNC-incorporated plasmonic substrate is increased by ∼6.4%
(relative) and ∼11.8% (relative), respectively, compared to
those on a nanostructured silver reflector without UCNC and on a plain
silver reflector with UCNC, owing to the combined effects of local
electric-field amplification to enhance the absorption of UCNC, augmented
upconverted emission via coupling into radiative modes, as well as
waveguided photon concentration.
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long-wavelength photonsGaAs microcellswaveguided photon concentrationgrowth waferbottom contact layersilver reflectorGaAs Solar Cellssilver nanostructureradiative modeselectric-field amplificationmicroscale GaAsnanostructured silver reflectorNonconcentrated Solar Illumination Spectral upconversionPlasmonically Enhanced Spectral Upconversionone-Sun photovoltaic performanceNaYF 4photovoltaic efficiencyplasmonic reflectorupconverted emissionUCNC-incorporated plasmonic substratesub-bandgap transparency
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