Effect of heterocyclic nitrogen ionic liquid additives on the rate of backreaction in DSSCS: An electrochemical characterization
| Autor: | Thiago Soares, Ingryd R.M. Araújo, Rhauane A. Galvão, Giovanna Machado, Larissa Agostinho de Santa-Cruz, Clarissa P. Frizzo, Marcos José Leite Santos, Fabiele C. Tavares, Brenno A. D. Neto |
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| Rok vydání: | 2021 |
| Předmět: |
Materials science
Passivation Materials Science (miscellaneous) IMVS/PS Nanoparticle 02 engineering and technology Electrolyte Ionic liquid additives 010402 general chemistry Electrochemistry 01 natural sciences Biomaterials chemistry.chemical_compound DSSC Materials of engineering and construction. Mechanics of materials Photocurrent Energy conversion efficiency Backreaction 021001 nanoscience & nanotechnology 0104 chemical sciences Electronic Optical and Magnetic Materials chemistry Chemical engineering Ionic liquid Charge extraction TA401-492 Ceramics and Composites Charge carrier 0210 nano-technology |
| Zdroj: | Journal of Science: Advanced Materials and Devices, Vol 6, Iss 3, Pp 483-487 (2021) |
| ISSN: | 2468-2179 |
| Popis: | The backreaction in dye-sensitized solar cells (DSSCs) was long ago recognized as one of the main causes of decreasing energy conversion efficiency. Hence, many different approaches have been attempted to reduce the backreaction. In the present work, we use nitrogen additives in the electrolyte to reduce the backreaction with TiO2 and I3−. Intensity-modulated photocurrent/photovoltage (IMPS/IMVS) and charge extraction (CE) techniques are used to obtain information on the dynamics of charge carriers in DSSCs assembled with and without nitrogen additives. The passivation process occurring on the nanoparticles, which is promoted by the additives, prevents recombination but does not change the electron transport time. Therefore, the description of transport and electron recombination kinetics in DSSCs is well established in this work with the emerging IMPS, IMVS, and CE techniques. |
| Databáze: | OpenAIRE |
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