Effect of TiO2 surface treatment on electron transfer in dye-sensitized solar cells
| Autor: | Suping Jia, Tong Cheng, Huinian Zhang, Hao Wang, Caihong Hao |
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| Rok vydání: | 2022 |
| Předmět: | |
| Zdroj: | Functional Materials Letters. 15 |
| ISSN: | 1793-7213 1793-6047 |
| DOI: | 10.1142/s1793604722510122 |
| Popis: | Defect states in the TiO2 nanoparticles can cause severe charge recombination and poor electron-transport efficiency when used as a photoanode in dye-sensitized solar cells (DSSCs). Herein, we report a simple and practical way to passivate the surface defects of TiO2 through hydrothermal treating with acetic acid and H2SO4, introducing a high percentage of 101 facets and sulfonic acid functional groups on the TiO2 surface. A high efficiency of 8.12% has been achieved, which is 14% higher than that of untreated TiO2 under the same condition. EIS results prove that the multiacid-treated TiO2 can promote electron transport and reduce charge recombination at the interface of the TiO2 and electrolyte. This work provides an efficient approach to engineer the electron-transport pathway in DSSCs. |
| Databáze: | OpenAIRE |
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