Efficient Ternary CdSSe Quantum-Dot-Sensitized Solar Cells based on MgO-coated TiO2 Nanoparticles

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

10 Scopus Citations
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  • Hui Li
  • Haidong Bian
  • Biao Nie
  • Zhenhua Chen


Original languageEnglish
Pages (from-to)526-530
Journal / PublicationEnergy Technology
Issue number6
Online published20 May 2014
Publication statusPublished - Jun 2014


The high rate of charge recombination in quantum‐dot‐sensitized solar cells (QDSCs) limits their power conversion efficiency. Here we address a facile way to reduce back electron transfer of QDSCs by introducing a thin MgO bridge layer between the TiO2 film and quantum dots. The ternary CdSSe QDs were used as our model system, and the MgO‐coated TiO2‐based ternary QDSCs showed a fill factor 41 % larger and efficiency 29 % higher than non‐coated ones. The enhanced performance is owing to the reduced recombination induced by the MgO bridge layer, which has been confirmed by electrochemical impedance spectroscopy (EIS) and intensity‐modulated photovoltage spectroscopy (IMVS) analysis.

Research Area(s)

  • charge recombination, impedance analysis, magnesium oxide, quantum dots, solar cells, SEMICONDUCTOR, TRANSPORT, CDS/CDSE, CIRCUIT, SIZE