Effect of TiO 2 nanopatterns on the performance of hydrogenated amorphous silicon thin-film solar cells

Joon Ho Oh, Ji Hwan Yang, Koeng Su Lim, Kang Soo Han, Yang Doo Kim, Heon Lee, Jun Hyuk Song, Kyoung Kook Kim, Tae Yeon Seong

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

We investigate how TiO 2 nanopatterns formed onto ZnO:Al (AZO) films affect the performance of hydrogenated amorphous silicon (a-Si:H) solar cells. Scanning electron microscopy results show that the dome-shaped TiO 2 nanopatterns (300 nm in diameter) having a period of 500 nm are formed onto AZO films and vary from 60 to 180 nm in height. Haze factor increases with an increase in the height of the nanopatterns in the wavelength region below 530 nm. Short circuit current density also increases with an increase in the height of the nanopatterns. As the nanopatterns increases in height, the fill factor of the cells slightly increases, reaches maximum (0.64) at 100 nm, and then decreases. Measurements show that a-Si:H solar cells fabricated with 100 nm-high TiO 2 nanopatterns exhibit the highest conversion efficiency (6.34%) among the solar cells with the nanopatterns and flat AZO sample.

Original languageEnglish
Pages (from-to)6287-6290
Number of pages4
JournalThin Solid Films
Volume520
Issue number19
DOIs
Publication statusPublished - 2012 Jul 31

Keywords

  • Amorphous silicon solar cells
  • Anti-reflection
  • Light scattering
  • Nanopatterns
  • Titanium dioxide
  • Zinc oxide

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films
  • Metals and Alloys
  • Materials Chemistry

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