Overcoming the poor short wavelength spectral response of CdS/CdTe photovoltaic modules via luminescence down-shifting: Ray-tracing simulations

B. S. Richards, K. R. McIntosh

Research output: Contribution to journalArticle

72 Citations (Scopus)

Abstract

The short-wavelength response of cadmium sulfide/cadmium telluride (CdS/CdTe) photovoltaic (PV) modules can be improved by the application of a luminescent downshifting (LDS) layer to the PV module. The LDS layer contains a mixture of fluorescent organic dyes that are able to absorb short-wavelength light of ? < 540 nm, nm, for which the PV module exhibited low external quantum efficiency (EQE), and re-emit it at a longer wavelength (? > 540 nm), where the solar cell EQE is high. Raytracing simulations indicate that a mixed LDS layer containing three dyes could lead to an increase in the short-circuit current density from Jsc = 19.8 mA/cm 2 to Jsc = 22.9 mA/cm2 for a CdS/CdTe PV module. This corresponds to an increase in conversion efficiency from 9.6% to 11.2%. This indicates that a relative increase in the performance of a production CdS/CdTe PV module of nearly 17% can be expected via the application of LDS layers, possibly without any making any alterations to the solar cell itself. Copyright © 2006 John Wiley & Sons, Ltd.

Original languageEnglish
Pages (from-to)27-34
Number of pages8
JournalProgress in Photovoltaics: Research and Applications
Volume15
Issue number1
DOIs
Publication statusPublished - Jan 2007

Keywords

  • CdS/CdTe
  • Down-shifting
  • Frequency conversion
  • Luminescence
  • Organic dyes
  • Ray-tracing
  • Wavelength conversion

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