Fe1-xCoxS2 Solid Solutions with Tunable Energy Structures to Enhance the Performance of Triiodide Reduction in Dye-Sensitized Solar Cells

Dui Ma, Jiantao Zai, Yan Wang, Qiquan Qiao, Xuefeng Qian

Research output: Contribution to journalArticlepeer-review

Abstract

The electrocatalytic performances of semiconductors are closely correlated to their energy structures, and solid solutions can continuously tune the energy structures by controlling their composition. Herein, a series of Fe1-xCoxS2 (x=0–0.5) solid solutions have been synthesized and served as counter electrodes in dye-sensitized solar cells (DSSCs). The Fermi level of Fe1-xCoxS2 solid solutions shifted negatively as the x value changed from 0 to 0.5, and the electrocatalytic performance for I3 reduction gradually enhanced due to the facilitated electron transfer process from electrode to I3 . Benefitting from its negative Fermi level, Fe0.5Co0.5S2 exhibited the smallest charge transfer resistance (Rct) and remarkable electrocatalytic properties. The DSSCs using Fe0.5Co0.5S2 as a counter electrode achieve the lowest Rct (0.84 Ω cm2) and the highest power conversion efficiency (η=8.36%) of these solid solution materials.

Original languageEnglish (US)
Pages (from-to)1043-1047
Number of pages5
JournalChemNanoMat
Volume4
Issue number10
DOIs
StatePublished - Oct 2018
Externally publishedYes

Keywords

  • dye-sensitized solar cells
  • electrocatalysts
  • energy structures
  • iron pyrite
  • solid solutions

ASJC Scopus subject areas

  • Biomaterials
  • Renewable Energy, Sustainability and the Environment
  • Energy Engineering and Power Technology
  • Materials Chemistry

Fingerprint Dive into the research topics of 'Fe<sub>1-x</sub>Co<sub>x</sub>S<sub>2</sub> Solid Solutions with Tunable Energy Structures to Enhance the Performance of Triiodide Reduction in Dye-Sensitized Solar Cells'. Together they form a unique fingerprint.

Cite this