Long-term analysis of PV module with large-area patterned anti-reflective film

Daihong Huh, Hak Jong Choi, Minseop Byun, Kwan Kim, Heon Lee

Research output: Contribution to journalArticlepeer-review

13 Citations (Scopus)


Due to the PV modules are exposed to the external environment, it is necessary to clean or replace the protective glass upon contamination. In this study, we demonstrate a large-area and flexible anti-reflective film with moth-eye pattern fabricated by using a highly straightforward process: nanoimprint lithography. In addition, the fabricated anti-reflective film exhibits self-cleaning capability owing to the hydrophobic self-assembled-monolayer-coated surface. The fabricated anti-reflective film was attached to the surface of photovoltaic (PV) modules and placed outdoor to conduct a seven-month field test in order to observe the increase in the conversion efficiency of the PV modules as a result of the effect of the anti-reflective film. Two types of patterns, moth-eye pattern and micro-cone pattern, were used as the anti-reflective patterns; these were conveniently fabricated by the ultraviolet-nanoimprint lithography process, which does not use vacuum or high-temperature process. In the seven-month analysis, the moth-eye patterned film was observed to exhibit a transmittance that is 5.0% higher than that of the flat film, whereas the PV module with the moth-eye patterned film on its surface exhibited a conversion efficiency that is 2.85% higher than that of the PV module with the flat film.

Original languageEnglish
Pages (from-to)525-528
Number of pages4
JournalRenewable Energy
Publication statusPublished - 2019 May


  • Anti-reflective
  • Field test
  • Long-term
  • Moth-eye
  • Nanoimprint lithography

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment


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