研究目的
Investigating the integration of reduced graphene oxide (rGO) into the titanium dioxide (TiO2) photoanode in DSSC to overcome the low efficiency due to electron recombination occurrence and low transparency of photoanode.
研究成果
The integration of rGO into TiO2 photoanode in DSSC showed promising results, with the best efficiency obtained at 2 wt% rGO loading. However, higher rGO concentrations led to decreased efficiency, indicating the need for further optimization.
研究不足
The efficiency of DSSC decreased with higher loading of rGO, possibly due to ineffective electron transfer in the photoanode. The study suggests further optimization of rGO for improvement of DSSC performance.
1：Experimental Design and Method Selection:
The study used a simple Hummer’s method to synthesize graphene oxide flakes and integrated rGO into TiO2 photoanode in DSSC. The concentration of rGO in TiO2 matrix was varied as 0,1,2,4 and 5 wt%.
2：Sample Selection and Data Sources:
Graphite powder was used as the starting material for GO synthesis.
3：List of Experimental Equipment and Materials:
Equipment included a centrifuge, vacuum pump filter, hot plate, and solar simulator. Materials included graphite powder, H2SO4, NaNO3, KMnO4, H2O2, hydrazine, TiO2 nanopowder (P25 Degussa), ITO glass, ruthenium dyes, and Platisol.
4：Experimental Procedures and Operational Workflow:
GO was synthesized from graphite powder using Hummer’s method, then reduced to rGO. TiO2-rGO nanocomposites were fabricated by integrating rGO into TiO2 colloidal dispersion. DSSC devices were fabricated using the doctor blade method for photoanode deposition.
5：Data Analysis Methods:
The samples were characterized by FTIR, UV-Vis spectroscopies, XRD, and SEM. DSSC device performance was investigated by IV curve measurement using a solar simulator.
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