Synergistic combination of TiO2-sol interconnecting-modified photoanode with alginate hydrogel-assisted electrolyte for quantum dots sensitized solar cells
| Autor: | Jianguo Tang, Jiuxing Wang, Feifei Yin, Ming Chen, Haoyang Jiang, Zhonglin Du |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Materials science
Renewable Energy Sustainability and the Environment 020209 energy Energy conversion efficiency 02 engineering and technology Surface finish Electrolyte Synergistic combination 021001 nanoscience & nanotechnology Redox chemistry.chemical_compound chemistry Chemical engineering Quantum dot 0202 electrical engineering electronic engineering information engineering General Materials Science Alginate hydrogel 0210 nano-technology Polysulfide |
| Zdroj: | Solar Energy. 215:189-197 |
| ISSN: | 0038-092X |
| Popis: | Constructing the highly efficient and stable quasi-solid-state even solid-state devices is one of the most significant tendency in the field of quantum dots sensitized solar cells (QDSCs). Herein, highly efficient and stable quasi-solid-state (QS)-QDSCs devices were fabricated via synergistically combining the TiO2-sol interconnecting-modified photoanodes with alginate hydrogel (AH)-assisted electrolyte films. TiO2-sol binding agent could incorporate into the surface and voids of TiO2 particles, which increased the surface area and roughness for QDs loading and induced better connection between the neighboring particles. Meanwhile, the AH-assisted QS-electrolyte films possessed the crosslinking hydrogel network structure and exhibited the perfect interfacial contact with the modified TiO2 surface, thus enhancing the ion transport and redox reaction of polysulfide couple. Benefited from the synergistic effect of TiO2-sol modified photoanodes and alginate hydrogel (AH)-assisted electrolytes, a champion power conversion efficiency (PCE) of 8.87% for model ZnCuInSe (ZCISe) based QS-QDSCs was achieved with an enhancement of near 10% related to that of the devices based the pristine devices (8.01%), and very close to that of liquid-junction QDSCs (9.06%). Moreover, the constructed QS-QDSCs devices exhibit the excellent stability. This work thus provides a facile and effective strategy to achieve the QS-QDSCs devices with both of high efficiency and good stability. |
| Databáze: | OpenAIRE |
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