Journal
OPTICAL MATERIALS
Volume 120, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.optmat.2021.111475
Keywords
Dye-sensitized solar cell; Recombination effect; Compact layer; Reduced graphene oxide; Titanium dioxide; Power conversion efficiency
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Funding
- Universiti Putra Malaysia Research Grant [UPM/800-3/3/1/GPB/2018/9659200]
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In this study, a compact layer of reduced graphene oxide-titanium dioxide (rGO-TiO2) was prepared by one-step electrodeposition, which effectively suppressed dark current and improved the performance of dye-sensitized solar cells. The incorporation of rGO-TiO2 compact layer increased the electron lifetime and charge collection efficiency, demonstrating its potential for enhancing DSSC performance.
Dye-sensitized solar cells (DSSCs) as one of the third generation of solar cells have gained great attention due to their inexpensive, easy to fabricate and environmental friendliness. In this study, a reduced graphene oxide-titanium dioxide (rGO-TiO2) compact layer (CL) was prepared by one-step electrodeposition. The presence of the rGO-TiO2 CL had successfully suppressed the dark current and shifted its onset potential to a higher forward bias, indicating a good blocking ability. The photoanode with the rGO-TiO2 CL displayed an improved power conversion efficiency by 96.60% compared to other photoanodes. The incorporation of the rGO-TiO2 CL also increased the electron lifetime and charge collection efficiency compared to the bare TiO2 photoanode. These results demonstrated that rGO-TiO2 CL is a promising material for the enhancement of DSSC performance.
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