Novel high-pressure airless spray exfoliation method for graphene nanoplatelets as a stable counter electrode in DSSC
| Autor: | Siva Bohm, Siva Sankar Nemala, Parag Bhargava, Sudhanshu Mallick, Karanveer S. Aneja, H. L. Mallika Bohm |
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| Rok vydání: | 2018 |
| Předmět: |
Auxiliary electrode
Materials science DYE General Chemical Engineering Efficiency 02 engineering and technology FILMS 010402 general chemistry 01 natural sciences law.invention chemistry.chemical_compound law Electrochemistry DSSC Graphite Triiodide PLATINUM Stable counter electrode Graphene Liquid phase exfoliation NANOSHEETS 021001 nanoscience & nanotechnology Cathode 0104 chemical sciences Graphene nanoplatelets Dye-sensitized solar cell Chemical engineering chemistry Electrode FUNCTIONALIZED GRAPHENE SENSITIZED SOLAR-CELLS Cyclic voltammetry 0210 nano-technology |
| Zdroj: | Electrochimica Acta. 285:86-93 |
| ISSN: | 0013-4686 |
| DOI: | 10.1016/j.electacta.2018.07.229 |
| Popis: | We demonstrate a novel, simple and low-cost exfoliation technique for large-scale production of graphene nanoplatelets (GNPs) directly from natural pristine graphite using high-pressure airless spray. These GNPs were utilized as a back cathode (counter electrode) in dye-sensitized solar cells (DSSCs). Structural analysis of these GNPs was investigated by X-ray diffraction studies and Raman spectroscopy. Cyclic voltammetry (CV) readings indicated that electro-catalytic behavior for triiodide reduction is comparable to that of Pt electrodes. The photo-conversion efficiency DSSCs fabricated using GNPs based counter electrode is found to be 6.72% under standard illumination (1 sun, 100 mW cm(-2), AM 1.5). The GNPs based counter electrode exhibits good stability over 3000 h under constant illumination with no significant efficiency drop. It is found that the DSSCs fabricated with GNPs based CE shows improved performance in efficiency as compared to other reports where graphene produced by various methods and is used as CE materials. (C) 2018 Elsevier Ltd. All rights reserved. |
| Databáze: | OpenAIRE |
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