https://scholars.lib.ntu.edu.tw/handle/123456789/408667
標題: | Electrospun membranes of imidazole-grafted PVDF-HFP polymeric ionic liquids for highly efficient quasi-solid-state dye-sensitized solar cells | 作者: | Pang H.-W. Yu H.-F. Huang Y.-J. Li C.-T. Ho K.-C. |
公開日期: | 2018 | 卷: | 6 | 期: | 29 | 起(迄)頁: | 14215-14223 | 來源出版物: | Journal of Materials Chemistry A | 摘要: | Three novel polymeric ionic liquids (PILs), denoted as PFII-F, PFII-E, and PFII-S, are successfully synthesized by grafting different molar ratios (one-fourth, one eighth, and one sixteenth, respectively) of 1-butylimidazolium iodide onto poly(vinylidene fluoride-co-hexafluoropropylene) (PVDF-HFP). These PFII PILs are fabricated as polymer membranes via a simple electrospinning technique, which are used as the electrolyte for quasi-solid-state (QSS) dye-sensitized solar cells (DSSCs). The PFII membranes have multiple functions including: (1) encapsulation of the liquid electrolyte with good charge transfer and ionic conductivity properties, (2) chelation of Li + through the lone pair electrons on their fluoride atoms, and (3) filling the dye-uncovered TiO 2 surface with their imidazolium segment. Function (1) endows DSSCs with prominent long-term stability, while functions (2) and (3) suppress the dark current. The best QSS-DSSC with the PFII-F membrane shows a larger open-circuit voltage (V OC ), comparable short-circuit current density (J SC ), better power conversion efficiency (£b) of 9.26%, and superior long-term stability (up to 97% of its initial £b) over 1500 h compared to the cell with standard liquid electrolyte (8.63%). ? 2018 The Royal Society of Chemistry. |
URI: | https://scholars.lib.ntu.edu.tw/handle/123456789/408667 | ISSN: | 20507488 | DOI: | 10.1039/c8ta01215f |
顯示於: | 化學工程學系 |
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