Degradation of CIGS solar cells due to the migration of alkali-elements

Mirjam Theelen, Nicolas Barreau, Vincent Hans, Henk Steijvers, Zeger Vroon, Miro Zeman

Research output: Chapter in Book/Conference proceedings/Edited volumeConference contributionScientificpeer-review

15 Citations (Scopus)


Non-encapsulated CIGS solar cells with different contents of sodium (Na) and potassium (K) were simultaneously exposed to damp heat and illumination. The solar cells with higher alkali (Na, K) content exhibited higher initial conversion efficiencies, but degraded severely within 100 hours, while samples with a lower alkali content retained their efficiency longer. The degradation was likely caused by the migration of alkali atoms, leading to shunting of the solar cells and the formation of alkali rich spots.

Original languageEnglish
Title of host publicationProceedings of the 42nd Photovoltaic Specialist Conference, PVSC 2015
EditorsS.A. Ringel
Place of PublicationPiscataway, NJ
Number of pages6
ISBN (Electronic)978-1-4799-7944-8
Publication statusPublished - Jun 2015
EventPVSC 2015: 42nd IEEE Photovoltaic Specialist Conference - New Orleans, LA, United States
Duration: 14 Jun 201519 Jun 2015
Conference number: 42


ConferencePVSC 2015
CountryUnited States
CityNew Orleans, LA


  • CIGS
  • damp heat
  • illumination
  • molybdenum
  • potassium
  • reliability
  • sodium
  • solar cell


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