Efficient Counter Electrode Manufactured from Ag2S Nanocrystal Ink for Dye-Sensitized Solar Cells

Qingquan He, Shoushuang Huang, Jiantao Zai, Nianqi Tang, Bo Li, Qiquan Qiao, Xuefeng Qian

Research output: Contribution to journalArticlepeer-review

Abstract

It is generally believed that silver or silver-based compounds are not suitable counter electrode (CE) materials for dye-sensitized solar cells (DSSCs) due to the corrosion of the I-/I3- redox couple in electrolytes. However, Ag2S has potential applications in DSSCs for catalyzing I3- reduction reactions because of its high carrier concentration and tiny solubility product constant. In the present work, CE manufactured from Ag2S nanocrystals ink exhibited efficient electrocatalytic activity in the reduction of I3- to I- in DSSCs. The DSSC consisting of Ag2S CE displayed a higher power conversion efficiency of 8.40 % than that of Pt CE (8.11 %). Moreover, the devices also showed the characteristics of fast activity onset, high multiple start/stop capability and good irradiated stability. The simple composition, easy preparation, stable chemical property, and good catalytic performance make the developed Ag2S CE as a promising alternative to Pt CE in DSSCs. Energy conversion: A counter electrode manufactured from Ag2S nanocrystal ink exhibited efficient electrocatalytic activity in the reduction of I3- to I- in dye-sensitized solar cells (see figure; DSSCs, η=8.40 %). The simple composition, easy preparation, stable chemical properties and good catalytic performance make the newly developed Ag2S a promising alternative to Pt in DSSCs.

Original languageEnglish (US)
Pages (from-to)15153-15157
Number of pages5
JournalChemistry - A European Journal
Volume21
Issue number43
DOIs
StatePublished - Oct 1 2015
Externally publishedYes

Keywords

  • catalysis
  • counter electrode
  • dye-sensitized solar cells
  • nanocrystal ink
  • silver

ASJC Scopus subject areas

  • Catalysis
  • Organic Chemistry

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