Fabrication of highly transparent self-cleaning protection films for photovoltaic systems

Seong Hwan Lee, Kang Soo Han, Ju Hyeon Shin, Seon Yong Hwang, Heon Lee

Research output: Contribution to journalArticlepeer-review

36 Citations (Scopus)


A moth-eye anti-reflective structure was fabricated by hot-embossing and UV nanoimprint lithography on a solar cell protective film to suppress the reflection of incident light. Moreover, a superhydrophobic surface was developed by reducing the surface energy by forming a hydrophobic self-assembled monolayer coating on an anti-reflective structured resin surface. Therefore, the transmittance of incident light was increased by the anti-reflective structure. As a result, the solar cell efficiency was enhanced and the total accumulated electrical energy generated by a solar cell with a nano-patterned polymeric film was increased. The efficiency of each solar cell was evaluated by an analysis of its I-V characteristics using a solar simulator, and the external quantum efficiency according to the wavelength of incident light was analyzed by using an incident photon-to-current conversion efficiency system. Finally, the enhancement of the generated power was confirmed by a field test and a power charging experiment.

Original languageEnglish
Pages (from-to)1056-1062
Number of pages7
JournalProgress in Photovoltaics: Research and Applications
Issue number5
Publication statusPublished - 2013 Aug


  • UV nanoimprint
  • anti-reflection
  • external quantum efficiency
  • hot-embossing
  • moth-eye pattern
  • nano-pattern
  • solar cell
  • superhydrophobicity

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Renewable Energy, Sustainability and the Environment
  • Condensed Matter Physics
  • Electrical and Electronic Engineering


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