Evaluation of Soiling and Potential Mitigation Approaches on Photovoltaic Glass

Chaiwat Engtrakul, Aaron Brooker, David Miller, Lin Simpson, Matthew Muller, Sarah Toth, Helio Moutinho, Bobby To, Jim John, Sonali Warade, Anil Kottantharayil, Asher Einhorn, Clare Lanaghan

Research output: Contribution to journalArticlepeer-review

41 Scopus Citations


The natural soiling of photovoltaic cover glass has recently been shown to include both an inorganic and organic particulate matter. Under favorable growth conditions, the latter can lead to the growth of dense colonies of filamentous fungi, which potentially leads to measurable performance losses over time. Herein, we report on a field study where glass coupon samples were deployed in soiling-prone locations, which focused on Dubai (United Arab Emirates) and Mumbai (India). For each site location, clear differences in the soiling were observed. The samples from Mumbai were contaminated with an abundance of filamentous fungi, whereas the samples from Dubai had primarily inorganic contamination. The effectiveness of soiling mitigation strategies, which include cleaning techniques and glass coatings, are discussed in detail.

Original languageAmerican English
Article number8529245
Pages (from-to)233-239
Number of pages7
JournalIEEE Journal of Photovoltaics
Issue number1
StatePublished - Jan 2019

Bibliographical note

Publisher Copyright:
© 2011-2012 IEEE.

NREL Publication Number

  • NREL/JA-5900-71802


  • Anti-reflective (AR)
  • anti-soiling (AS)
  • biofouling
  • coating
  • cover glass
  • degradation
  • fungus
  • photovoltaic (PV), soiling


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