Fire-through Ag contact formation for crystalline Si solar cells using single-step inkjet printing

Hyun Gang Kim, Sung Bin Cho, Bo Mook Chung, Joo Youl Huh, Sam S. Yoon

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

Inkjet-printed Ag metallization is a promising method of forming front-side contacts on Si solar cells due to its non-contact printing nature and fine grid resolution. However, conventional Ag inks are unable to punch through the SiN x anti-reflection coating (ARC) layer on emitter Si surfaces. In this study, a novel formulation of Ag ink is examined for the formation of fire-through contacts on a SiN x - coated Si substrate using the single-step printing of Ag ink, followed by rapid thermal annealing at 800 °C. In order to formulate Ag inks with fire-through contact formation capabilities, a liquid etching agent was first formulated by dissolving metal nitrates in an organic solvent and then mixing the resulting solution with a commercial Ag nanoparticle ink at various volume ratios. During the firing process, the dissolved metal nitrates decomposed into metal oxides and acted in a similar manner to the glass frit contained in Ag pastes for screen-printed Ag metallization. The newly formulated ink with a 1 wt% loading ratio of metal oxides to Ag formed finely distributed Ag crystallites on the Si substrate after firing at 800 °C for 1 min.

Original languageEnglish
Pages (from-to)3620-3623
Number of pages4
JournalJournal of Nanoscience and Nanotechnology
Volume12
Issue number4
DOIs
Publication statusPublished - 2012

Keywords

  • Additives
  • Fire-through contact
  • Inkjet printing
  • Si solar cell

ASJC Scopus subject areas

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

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