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

7 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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