The effect of damp heat-illumination exposure on CIGS solar cells: A combined XRD and electrical characterization study

Mirjam Theelen, Ruud Hendrikx, Nicolas Barreau, Henk Steijvers, A.J. Bottger

Research output: Contribution to journalArticleScientificpeer-review

10 Citations (Scopus)

Abstract

Unencapsulated CIGS solar cells were simultaneously exposed to damp heat and illumination. In-situ monitoring of their electrical parameters demonstrated a rapid decrease of the efficiency, mainly driven by changes in the series and shunt resistances. The non-degraded and degraded solar cells were studied by SIMS and XRD to investigate the material changes leading to efficiency loss. SIMS showed the migration of sodium and potassium, likely leading to changes in the shunt resistance and output voltage. Extensive XRD measurements showed that molybdenum oxide was formed and that the in-plane stress in the ZnO:Al film increased. The stress increase is most likely due to the incorporation of species like hydroxide in the grain boundaries. These phenomena could lead to the observed increased series resistance in the solar cells.

Original languageEnglish
Pages (from-to)943-952
JournalSolar Energy Materials & Solar Cells
Volume157
DOIs
Publication statusPublished - 2016

Keywords

  • CIGS
  • Damp heat
  • Degradation
  • In-situ monitoring
  • Molybdenum
  • Solar cells
  • X-ray diffraction
  • Zinc oxide

Fingerprint

Dive into the research topics of 'The effect of damp heat-illumination exposure on CIGS solar cells: A combined XRD and electrical characterization study'. Together they form a unique fingerprint.

Cite this