Abstract
In this study, high order crystalline tungsten disulfide (WS2) nanoparticles/graphene sheets (WS2/Gs) were prepared via facile hydrothermal technique. Hexagonal crystalline structure of WS2 with individual spherical shaped nanoparticles within the average sizes of 35–40 nm were found through XRD, SEM and TEM analysis. Further the structure of the WS2/Gs was found with the presence of D and G bands along with WS2 based Raman modes in the Raman spectra analysis. The incorporated WS2 into Gs will significantly increasing the absorption property, tuning the band gap (2.87–2.21 eV) and rapid electron charge transfer process, which is identified through UV-DRS and PL analysis. The fabricated dye-sensitized solar cells device with WS2/graphene photo-electrode showed an open circuit voltage (Jsc) of 0.79 mV, short circuit current (Voc) of 18.6 mA cm−2, fill factor of 0.66, and power conversion efficiency of 9.6%. This could be due to the high surface area (98.45) and mesoporous nature (10.25 nm) of the WS2/Gs composite hybrid photo-anodes. The detailed mechanism of WS2 improved by Gs is also discussed in detail. The strategy could provide new ideas for obtaining novel hybrid photo-anodes with excellent photovoltaic performance.
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Krishnamoorthy, D., Prakasam, A. Graphene Hybridized with Tungsten disulfide (WS2) Based Heterojunctions Photoanode Materials for High Performance Dye Sensitized Solar Cell Device (DSSCs) Applications. J Clust Sci 32, 621–630 (2021). https://doi.org/10.1007/s10876-020-01828-1
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DOI: https://doi.org/10.1007/s10876-020-01828-1