Fig 1.
Schematic of GO72–TiO2 nanocomposite-based photoanode in DSSCs.
Table 1.
Synthesis parameter of GO.
Fig 2.
XRD patterns of (a) GO20, (b) GO40, (c) GO60, (d) GO72, (e) GO80, and (f) graphite.
Table 2.
Peak position, d-spacing, FWHM, and crystallite size of GO and graphite.
Fig 3.
FESEM of (a) GO20, (b) GO40, (c) GO60, (d) GO72, (e) GO80, and (f) graphite.
Fig 4.
EDX of (a) GO20, (b) GO40, (c) GO60, (d) GO72, (e) GO80, and (f) graphite.
Table 3.
Summary of EDX analysis (atomic %) of GO and graphite.
Fig 5.
FTIR spectra of (a) GO20, (b) GO40, (c) GO60, (d) GO72, (e) GO80, and (f) graphite.
Fig 6.
Raman spectra of (a) GO20, (b) GO40, (c) GO60, (d) GO72, (e) GO80, and (f) graphite.
Table 4.
Raman analysis of GO and graphite.
Fig 7.
J–V curves of DSSCs under AM 1.5 condition (power density, Px = 100 mW/cm2) with photoanode based on (a) mesoporous TiO2 and (b) GO72–TiO2 nanocomposite.
Table 5.
Typical photovoltaic performance of DSSCs based on mesoporous TiO2 and TiO2 decorated with GO72.
Fig 8.
Nyquist plot and equivalent circuit of DSSCs (TiO2 and GO-decorated photoanode) from EIS measurements.
Table 6.
Summaries of electron lifetime of TiO2-based and GO-decorated photoanode.
Fig 9.
Working mechanism of DSSCs.
Fig 10.
Electron energy level diagram of DSSCs.