Efficiency enhancement of silicon solar cells through a downshifting and antireflective oxysulfide phosphor layer

Wen Bin Hung, Teng-Ming Chen*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

26 Scopus citations

Abstract

A simple, rapid, and low-cost anti-reflection coating (ARC) for polycrystalline silicon (pc-Si) solar cells has been developed by spin coating a solution of submicron spherical Gd2O2S:Eu3+ phosphor impregnated in a polyvinylpyrrolidone (PVP) matrix on the textured surface of the solar cell. Under a simulated one-sun illumination, this predesigned device achieved an enhancement of 6.74 mA/cm2 in short-circuit current density and 2.76% in power conversion efficiency relative to those for a pristine cell. Based on photoluminescence, reflectance, and optical spectral studies, the underlying mechanism for these improvements can be attributed to the luminescent down-shifting (LDS) capability in the ultraviolet range and additional promotion of light absorption within the measured spectral region. Our results indicate that a suitable inorganic phosphor impregnated in a polymer matrix may potentially serve as a feasible solution to compensate for the spectral mismatch and Fresnel reflection loss of silicon solar cells.

Original languageEnglish
Pages (from-to)39-47
Number of pages9
JournalSolar Energy Materials and Solar Cells
Volume133
DOIs
StatePublished - 1 Jan 2015

Keywords

  • Antireflection coating
  • Downshifting
  • GdOS:Eu
  • Phosphor layer
  • Silicon solar cells
  • Spin coating

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