Newly Developed Broadband Antireflective Nanostructures by Coating a Low-Index MgF2 Film onto a SiO2 Moth-Eye Nanopattern

Gang Yeol Yoo, Naufan Nurrosyid, Seungje Lee, Youngsoon Jeong, Ilsun Yoon, Changwook Kim, Woong Kim, Sung Yeon Jang, Young Rag Do

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

A newly developed nanopatterned broadband antireflective (AR) coating was fabricated on the front side of a glass/indium tin oxide/perovskite solar cell (PSC) by depositing a single interference layer onto a two-dimensional (2D)-patterned moth-eye-like nanostructure. The optimized developed AR nanostructure was simulated in a finite-difference time domain analysis. To realize the simulated developed AR nanostructure, we controlled the SiO2 moth-eye structure with various diameters and heights and a MgF2 single layer with varying thicknesses by sequentially performing nanosphere lithography, reactive ion etching, and electron-beam evaporation. Optimization of the developed AR nanostructure, which has a 100 nm-thick MgF2 film coated onto the SiO2 moth-eye-like nanostructure (diameter 165 nm and height 400 nm), minimizes the reflection loss throughout the visible range. As a result, the short-circuit current density (JSC) of the newly AR-coated PSC increases by 11.80%, while the open-circuit voltage (VOC) remains nearly constant. Therefore, the power conversion efficiency of the newly developed AR-decorated PSC increases by 12.50%, from 18.21% for a control sample to 20.48% for the optimum AR-coated sample. These results indicate that the newly developed MgF2/SiO2 AR nanostructure can provide an advanced platform technology that reduces the Fresnel loss and therefore increases the possibility of the commercialization of glass-based PSCs.

Original languageEnglish
Pages (from-to)10626-10636
Number of pages11
JournalACS Applied Materials and Interfaces
Volume12
Issue number9
DOIs
Publication statusPublished - 2020 Mar 4

Keywords

  • antireflection
  • finite-difference time domain
  • MgF
  • moth eye
  • single-layer interference

ASJC Scopus subject areas

  • Materials Science(all)

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