Wide-angle antireflection effect of subwavelength structures for solar cells

Hitoshi Sai, Homare Fujii, Koji Arafune, Yoshio Ohshita, Yoshiaki Kanamori, Hiroo Yugami, Masafumi Yamaguchi

Research output: Contribution to journalArticlepeer-review

92 Citations (Scopus)


The angle-dependent reflectivity of several surface structures was analyzed and evaluated with the viewpoint of solar cell applications. Numerical analysis showed that a Si subwavelength structure (SWS) maintains a lower reflectivity at large incident angles than conventional light-trapping techniques such as a random pyramid texture, and that it can contribute to increasing the output power of solar cells under oblique irradiation. This wide-angle antireflection effect was demonstrated by fabricating test crystalline Si cells with several surface structures including a SWS and measuring their angle-dependent short-circuit current densities.

Original languageEnglish
Pages (from-to)3333-3336
Number of pages4
JournalJapanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers
Issue number6 A
Publication statusPublished - 2007 Jun 6


  • Angle dependence
  • Antireflection
  • Light-trapping
  • Solar cell
  • Subwavelength structure
  • Surface texture

ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy(all)


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