https://scholars.lib.ntu.edu.tw/handle/123456789/408693
標題: | Hierarchical TiO1.1Se0.9-wrapped carbon cloth as the TCO-free and Pt-free counter electrode for iodide-based and cobalt-based dye-sensitized solar cells | 作者: | Li C.-T. Lee C.-P. Chiu I.-T. Vittal R. Huang Y.-J. Chen T.-Y. Pang H.-W. Lin J.T. Ho K.-C. |
公開日期: | 2017 | 卷: | 5 | 期: | 27 | 起(迄)頁: | 14079-14091 | 來源出版物: | Journal of Materials Chemistry A | 摘要: | A titanium oxide-selenide (TiO1.1Se0.9) composite material was successfully obtained on a flexible substrate of carbon cloth (CC); this TiO1.1Se0.9/CC electrode was used as the counter electrode (CE) in a dye-sensitized solar cell (DSSC). Each carbon fiber in the CC was wrapped with a composite layer of TiO1.1Se0.9, and the composite layer contained TiO1.1Se0.9 nanospheres and one-dimensional (1D) nanorods. Thus, each carbon fiber with its TiO1.1Se0.9 layer has a hierarchical core-shell structure, in which the carbon fiber acts as a one-dimensional conductive core for electron transfer and the TiO1.1Se0.9 layer around the fiber functions as an electro-catalytic shell. In iodide-based electrolyte, the DSSC with the TiO1.1Se0.9/CC exhibits a power conversion efficiency (£b) of 9.47%, which is higher than cells with CEs of Pt/CC (7.75%) and pristine TiO2/CC (4.90%). Under dim light conditions, the best TiO1.1Se0.9/CC electrode rendered its cell an £b of 10.00% at 0.5 sun and the best £b of 10.39% at 0.1 sun. In cobalt-based electrolytes, a DSSC with the TiO1.1Se0.9/CC shows an attractive £b of 10.32% at 1.0 sun, the best £b of 10.47% at 0.5 sun, and an impressive £b of 10.20% at 0.1 sun. The earth abundant and low-cost TiO1.1Se0.9 is a promising alternative to Pt for the CE of a DSSC in both iodide and cobalt electrolytes. ? 2017 The Royal Society of Chemistry. |
URI: | https://scholars.lib.ntu.edu.tw/handle/123456789/408693 | ISSN: | 20507488 | DOI: | 10.1039/c7ta02474f |
顯示於: | 化學工程學系 |
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