A Dry Heat-Induced Effect of Using Silver in CIGS Gridlines

J. R. Mann, M. Kempe, I. Repins, A. Duda, S. Glick, A. Kanevce

Research output: Contribution to journalArticlepeer-review


The ease with which screen-printed silver is deposited and its high conductivity make it an appealing choice for gridline material on CIGS-based photovoltaic devices. However, present results suggest silver diffusion into the device can cause severe reductions in efficiency after as little as 200 h at 85 °C. Dramatic reductions in fill factor, characterized by unusual inflections in the power quadrant of current-voltage curves, are observed for devices with silver gridlines but not for those with nickel or aluminum gridlines. The shape of the current-voltage curves demonstrate that the degradation mode is not simply due to changes in resistance but is consistent with the creation of a secondary barrier near the device junction.

Original languageAmerican English
Article number6338995
Pages (from-to)457-460
Number of pages4
JournalIEEE Journal of Photovoltaics
Issue number1
StatePublished - 2013

NREL Publication Number

  • NREL/JA-5200-56300


  • Buffer
  • Cu(In,Ga)Se (CIGS)
  • diffusion
  • gridlines
  • photocurrent
  • silver


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