Application of NaYF₄:Er³⁺ up-converting phosphors for enhanced near-infrared silicon solar cell response
Date
2005-12-28
Authors
Shalav, A.
Richards, B. S.
Trupke, T.
Krämer, K. W.
Güdel, H. U.
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American Institute of Physics (AIP)
Abstract
Erbium-doped sodium yttrium fluoride (NaYF₄:Er³⁺) up-conversion phosphors were attached to the rear of a bifacial silicon solar cell to enhance its reponsivity in the near-infrared. The incident wavelength and light intensity were varied and the resulting short circuit current of the solar cell was measured. A close match between the spectral features of the external quantum efficiency and the phosphor absorption is consistent with the energy transfer up-conversion process. The peak external quantum efficiency of the silicon solar cell was measured to be (2.5±0.2)% under 5.1 mW laser excitation at 1523 nm, corresponding to an internal quantum efficiency of 3.8%.
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Applied Physics Letters
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