Synthesis of double-shelled copper chalcogenide hollow nanocages as efficient counter electrodes for quantum dot-sensitized solar cells

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journal

10 Scopus Citations
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  • Zhengqiao Hu
  • Ru Zhou
  • Weijun Sun
  • Junjun Zhang
  • Jun Xu


Original languageEnglish
Pages (from-to)331-337
Journal / PublicationMaterials Today Energy
Online published2 Aug 2017
Publication statusPublished - Sep 2017


Double-shelled copper chalcogenide (Cu2−xSe and Cu7S4) nanocages of about 250 nm sizes are synthesized respectively by using Cu2O nanocubes as sacrificial precursor via Kirkendall diffusion and etching. Both the double-shelled Cu2−xSe and Cu7S4 nanocages are demonstrated to be excellent counter electrode (CE) materials in quantum dot-sensitized solar cells (QDSSCs) and exhibit high electrocatalytic activities for polysulfide electrolyte regeneration. The QDSSCs using the double-shelled Cu2−xSe and Cu7S4 nanocages as CEs show power conversion efficiencies (PECs) of 4.76 and 4.53%, respectively, which are 19.6% and 15.3% higher than the corresponding devices using the single-shelled Cu2−xSe and Cu7S4 nanocages as CEs. The overall enhancement of photovoltaic performance including the fill factor, short-circuit current density and PEC is attributed to the larger CE-electrolyte interface provided by the double-shelled nanocages facilitating fast electron transfer in the QDSSCs.

Research Area(s)

  • Copper chalcogenides, Counter electrode, Interface, Nanocages, Solar cells

Citation Format(s)