Paste Aging Spontaneously Tunes TiO2 Nanoparticles into Reproducible Electrosprayed Photoelectrodes
| Autor: | Md. Akhtaruzzaman, Jean-Michel Nunzi, Satoru Iwamori, Md. Shahiduzzaman, Shinjiro Umezu, Boyang Chen, Tetsuya Taima, Koji Tomita, LiangLe Wang, Hiroki Fukuhara |
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| Rok vydání: | 2021 |
| Předmět: |
Spontaneous microstructure tuning
Aging Materials science Energy conversion efficiency Oxides Particle size Dye-sensitized solar cells Microstructure Amorphous solid Dye-sensitized solar cell Crystallinity Chemical engineering Dynamic light scattering Electrode TiO2 Reproducible Nanoparticles General Materials Science Microstructures Electrospray technique Electrodes N719 dye |
| Zdroj: | ACS Applied Materials & Interfaces. 13:53758-53766 |
| ISSN: | 1944-8252 1944-8244 |
| DOI: | 10.1021/acsami.1c13793 |
| Popis: | In this study, the spontaneous microstructure tuning of TiO2 was observed by aging the ethanol/water TiO2 paste for up to 20 days at ambient conditions. A dynamic light scattering study reveals that it formed the outstanding reproducible TiO2 microstructure with a ∼200 nm average particle size and stabilizes in 6 to 20 days under an ambient atmosphere. Interestingly, the as- deposited day 15 sample spontaneously changed its crystallinity upon keeping the paste at ambient conditions; meanwhile the day 0 sample showed an amorphous structure. A dense, uniform, and stable TiO2 electrode was cast on a fluorine doped-tin oxide substrate using the electrospray technique. We exploit the spontaneous evolution of the TiO2 nanopowder to revisit the fabrication procedure of the TiO2 photoelectrode for dye-sensitized solar cells (DSSCs). The controlled microstructure TiO2 film was used in DSSCs, which, to the best of our knowledge, achieved the highest power conversion efficiency of 9.65% using N719 dye in sensitizing the TiO2 photoanode. |
| Databáze: | OpenAIRE |
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