Effect of Copper and Cobalt Metal Complex Redox Mediator Based Xanthan Gum Gel Electrolyte Materials on Performance of Dye Sensitized Solar Cells. Issue 43 (16th November 2022)

• Record Type: Journal Article
• Authors: Selvaraj, Balamurugan; Shanmugam, Ganesan; Kamaraj, Santhosh; Thirugnanasambandam, Eswaramoorthi; Peters, Silda; Gunasekeran, Ahalya; Sambandam, Anandan; Pillai, Renjith S.
• Is Part Of: ChemistrySelect. Volume 7:Issue 43(2022)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2022-11-16
• Subjects: Aqueous gel electrolytes -- DFT Studies -- Dye-sensitized solar cells -- Organic ligands -- Redox mediators; Chemistry -- Periodicals; 540.5
• DOI: 10.1002/slct.202203197
• Languages: English
• ISSNs: 2365-6549

Abstract

Abstract: In this study, we report the first application of (4‐(tert‐butyl) benzyl or 4‐methyl benzyl)‐substituted 2‐(pyridin‐2‐yl)‐1H‐benzo[ d ]‐imidazole coordinated copper and cobalt redox shuttles Cu [((tbb) pbi)2 ] +1/+2, Cu [(mbpbi)2 ] +1/+2, Co [((tbb) pbi)3 ] +2/+3 and Co [(mbpbi)3 ] +2/+3 based xanthan gum gel electrolytes (XGE‐1, XGE‐2, XGE‐3 and XGE‐4) in fabrication of Dye sensitized solar cells. Interestingly, XGE‐1 and XGE‐2 obtained higher efficiency of 4.08 and 3.04 % under 1sun illumination. Specifically, highly donor moiety 4‐(tert‐butyl)benzyl)‐substituted (on N−H position) 2‐(pyridin‐2‐yl)‐1H‐benzo[ d ]‐imidazole ligands coordinated, Cu [((tbb) pbi)2 ] +1/+2 gel electrolyte achieved best performance due to its appropriate redox potential of 0.80 V versus Normal Hydrogen Electrode. This high performance also confirmed with the interfacial studies of the devices. As per the computational results, the copper redox mediators conquered lower reorganization energy and free energy about (0.11‐0.20 & 0.18–0.27 eV) due to the effect of ligands structure. Overall, Cu [((tbb) pbi)2 ] +1/+2 act as redox shuttle for highly proficient DSSCs. Abstract : 4‐(tert‐butyl)benzyl)‐substituted (on N−H position) 2‐(pyridin‐2‐yl)‐1H‐benzo[ d ]‐imidazole ligands coordinated, Cu [((tbb) pbi)2 ] +1/+2 Xanthan gum aqueous gel electrolyte achieved higher efficiency under 1 sun illumination.