Sodium carboxymethyl starch-based highly conductive gel electrolyte for quasi-solid-state quantum dot-sensitized solar cells
| Autor: | Wenliang Feng, Wei Wang, Xiaoyan Wang, Lianjing Zhao, Yan Li, Wenran Wang |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
chemistry.chemical_classification
Materials science Aqueous solution Passivation Metal ions in aqueous solution Inorganic chemistry 02 engineering and technology General Chemistry Electrolyte Polymer 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences chemistry.chemical_compound chemistry Quantum dot 0210 nano-technology Quasi-solid Polysulfide |
| Zdroj: | Research on Chemical Intermediates. 44:1161-1172 |
| ISSN: | 1568-5675 0922-6168 |
| DOI: | 10.1007/s11164-017-3159-1 |
| Popis: | Liquid-junction quantum dot sensitized solar cells (QDSCs) have been facing a long stability issue due to the volatilization and leakage of liquid electrolytes. Solidification of liquid electrolytes was expected to solve the main challenge for the application of QDSCs. Herein, a novel gel electrolyte was developed by solidifying conventional polysulfide aqueous solution with CMS-Na (Sodium Carboxymethyl Starch) as gelator. Due to its superior water absorbing and holding capacity as well as dimensional porous networks, the obtained CMS-Na gel electrolyte exhibits high conductivity and beneficial ion transport. Meanwhile, CMS-Na gel electrolyte could form a passivation layer coated on the surface of QDs/TiO2 via its strong coordination of carboxylate groups on CMS-Na polymer chains with metal ions, sequentially suppressing the charge recombination between photoanode and electrolyte. As expected, the constructed quasi-solid-state QDSCs exhibited a photoelectric conversion efficiency of 6.32%, which is comparable to that of liquid-junction QDSCs. Notably, light-soaking stability of the resultant QDSCs is significantly improved. |
| Databáze: | OpenAIRE |
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