Fabrication of Ag nanoparticles adhered on RGO based on both electrodes in dye-sensitized solar cells (DSSCs)

Abstract

The electrode plays an important role in dye-sensitized solar cells (DSSCs). Preparation of the electrode should be simple and should result in high performance of its DSSC. We herein demonstrated high-performance and easily prepared Silver nanoparticles adhered on Reduced graphene oxide-Platinum composites (Ag-RGO/Pt) as counter electrodes (CEs) and TiO 2 on RGO sheets with Ag (TiO 2-RGO/Ag) as photoanode (PE) in DSSCs. The 1:2 Ag-RGO/Pt CE and 0.5% TiO 2-RGO/Ag PE showed an overall highest power conversion efficiency of 9.15% under (1.5 AM) solar irradiation. The optimal weight ratio of Ag:RGO:Pt materials was also examined. Moreover, we showed that incorporation of Ag nanoparticles into the counter electrode successfully improved interfacial charge transfer resulting in high electrocatalytic activity for the reduction of triiodide to iodide redox, which in turn could enhance the performance of the DSSCs.

Methylphenidate adsorption onto graphene derivatives: theory and experiment

“…In some places, graphene oxide exhibits a smooth surface, while in others, the formation of agglomerates is verified. 45,46…”

Green and Sustainable Ultrasound-Assisted Anodic Electrochemical Preparation of Graphene Oxide Dispersions and Their Antioxidant Properties

“…The graphene oxide sheet size and the prepared EGO morphology were determined using SEM ( Figure 6 a,b) and HRTEM ( Figure 6 c,d). According to these images, the morphology is uncharacteristic of graphene oxide [ 57 ]. This may be due to particle coagulation during evaporation from the solution to prepare the sample for measurements [ 58 ].…”

Recent advances in graphene-based materials for dye-sensitized solar cell fabrication

“…86 In this respect, rGO has been employed to modify the TiO 2 semiconducting layer, resulting in DSSCs with PCEs, such as 7.20, 87 7.48, 88 7.68, 89 8.51, 90 4.43 76 and 6.90%, 91 which generally outperformed their pristine TiO 2 , rGO and GO/TiO 2 counterparts. In addition, rGO-based ternary nanocomposites, such as TiO 2 / cadmium sulde (CdS)/rGO, 92 rGO/graphene/TiO 2 , 18 and Ag/ rGO/TiO 2 , 93,94 have also been used as semiconducting layers in DSSCs, which helped to increase the electron transfer rate and mobility. This resulted in devices with PCEs of 6.50, 11.80, 6.87 and 9.15%, respectively, which outperformed the corresponding TiO 2 reference device, thereby, revealing the importance of employing graphene-based nanocomposites in future research to enhance device performance.…”