An Insight into the Role of Oxygen Vacancy in Hydrogenated TiO2 Nanocrystals in the Performance of Dye-Sensitized Solar Cells

Hydrogenated titanium dioxide nanocrystals were successfully prepared via annealing TiO2 in H2/N2 mixed gas flow at elevated temperatures ranging from 300 to 600 °C

Ting Su; Yulin Yang; Yong Na; Ruiqing Fan; Liang Li; Liguo Wei; Bin Yang; Wenwu Cao

2015

Scholarcy highlights

  • Hydrogenated titanium dioxide nanocrystals were successfully prepared via annealing TiO2 in H2/N2 mixed gas flow at elevated temperatures ranging from 300 to 600 °C
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  • The H-TiO2 nanocrystals prepared at different temperatures were employed into photoanodes sensitized by N719 dye and found to have exceptional effect on the solar-to-electric energy conversion efficiency
  • SEM images of TiO2 samples and hydrogenated TiO2; Tauc plots of TiO2 and hydrogenated TiO2; XPS spectra and atom percentages of the O 1s and Ti 2p peaks determined by the XPS analysis; photoelectric properties of DSSC with different treatment; equivalent circuit used to represent interface in DSSCs consisting of FTO glass substrate/TiO2/dye/I3–/I–∥Pt/FTO glass substrate; parameters obtained by the equivalent circuit
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