A Ternary-Mixture-Based Counter Electrode for Quantum-Dot-Sensitized Solar Cells

Dan Li, Zhiqiang Fu, Qiuchen Han, Chen Hsueh Lin, Shufang Gao, Yan Xiong, Ten Chin Wen

Research output: Contribution to journalArticle

Abstract

A ternary mixture of carbon, copper sulfide, and cobalt sulfide was used to fabricate the counter electrode (CE) in quantum-dot-sensitized solar cells (QDSSCs). The ternary-mixture-based CE achieved much higher energy conversion efficiency than any CE based on the individual material. The mixture and the CE were investigated by photocurrent density-voltage characteristics, X-ray diffraction patterns, electrochemical impedance spectroscopy, and contour line plots. A balanced mix results in enhanced photocurrent and reduced charge transfer resistance at the interface, and this leads to optimized device performance. The highest photoelectric conversion efficiency was 3.73% at a 1:1:1 mass ratio. The efficiency was as high as 3.09% via a corresponding flexible CE.

Original languageEnglish
Pages (from-to)7121-7128
Number of pages8
JournalACS Applied Energy Materials
Volume3
Issue number7
DOIs
Publication statusPublished - 2020 Jul 27

All Science Journal Classification (ASJC) codes

  • Chemical Engineering (miscellaneous)
  • Energy Engineering and Power Technology
  • Electrochemistry
  • Materials Chemistry
  • Electrical and Electronic Engineering

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