Synthesis and characteristics of Tb-doped Y 2SiO 5 nanophosphors and luminescent layer for enhanced photovoltaic cell performance

Dong Kyun Yim, In Sun Cho, Sangwook Lee, Chae Hyun Kwak, Dong Hoe Kim, Jung Kun Lee, Kug Sun Hong

Research output: Contribution to journalArticlepeer-review

10 Citations (Scopus)

Abstract

Nanophosphors based on green emitting terbium doped yttrium silicates with the general formula Y 2SiO 5:Tb 3+ with a size of 30∼60 nm were synthesized by the hydrothermal method. The prepared nanophosphors were characterized by X-ray diffraction, field-emission scanning electron microscopy, transmission electron microscopy, UV-Vis diffuse reflectance spectroscopy and fluorescence spectroscopy. It was found that the nanophosphors crystallize in an X 1-type monoclinic structure (P2 1/c) and absorb UV light from 220 to 300 nm which they then down-convert into visible-light (strong green emission at around 545 nm ( 5D 47F J)). As TiO 2-based dye-sensitized solar cells exhibit their maximum incident photon to current efficiency at around 500∼600 nm, the wavelength-modulation characteristics of the nanophosphors can be efficient for dye-sensitized solar cell systems. Therefore, the Y 2SiO 5:Tb 3+ nanophosphors were introduced into a TiO 2-based dye-sensitized solar cell and their effects on the performance of the solar cell were investigated.

Original languageEnglish
Pages (from-to)8748-8753
Number of pages6
JournalJournal of Nanoscience and Nanotechnology
Volume11
Issue number10
DOIs
Publication statusPublished - 2011
Externally publishedYes

Keywords

  • Down Conversion
  • Dye Sensitized Solar Cell
  • Nano Phosphor
  • Photovoltaic
  • Yttrium Silicate

ASJC Scopus subject areas

  • Bioengineering
  • Chemistry(all)
  • Biomedical Engineering
  • Materials Science(all)
  • Condensed Matter Physics

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