Multifunctional Iodide-Free Polymeric Ionic Liquid for Quasi-Solid-State Dye-Sensitized Solar Cells with a High Open-Circuit Voltage

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题名:	Multifunctional Iodide-Free Polymeric Ionic Liquid for Quasi-Solid-State Dye-Sensitized Solar Cells with a High Open-Circuit Voltage
作者:	陳銘洲;Lin, Yi-Feng;Li, Chun-Ting;Lee, Chuan-Pei;Leu, Yow-An;Ezhumalai, Yamuna;Vittal, R;Chen, Ming-Chou;Lin, Jiang-Jen;Ho, Kuo-Chuan
贡献者:	理學院化學學系
关键词:	cations;chelates;electrons;gels;ionic liquids;oxygen;photovoltaic cells;potassium;redox potential;volatile organic compounds
日期:	2016-06-22
上传时间:	2026-04-21 14:46:54 (UTC+8)
出版者:	American Chemical Society;United States: American Chemical Society
摘要:	摘要： A polymeric ionic liquid, poly(oxyethylene)-imide-imidazolium selenocyanate (POEI-IS), was newly synthesized and used for a multifunctional gel electrolyte in a quasi-solid-state dye-sensitized solar cell (QSS-DSSC). POEI-IS has several functions: (a) acts as a gelling agent for the electrolyte of the DSSC, (b) possesses a redox mediator of SeCN–, which is aimed to form a SeCN–/(SeCN)3 – redox couple with a more positive redox potential than that of traditional I–/I3 –, (c) chelates the potassium cations through the lone pair electrons of the oxygen atoms of its poly(oxyethylene)-imide-imidazolium (POEI-I) segments, and (d) obstructs the recombination of photoinjected electrons with (SeCN)3 – ions in the electrolyte through its POEI-I segments. Thus, the POEI-IS renders a high open-circuit voltage (V OC) to the QSS-DSSC due to its functions of b–d and prolongs the stability of the cell due to its function of a. The QSS-DSSC with the gel electrolyte containing 30 wt % of the POEI-IS in liquid selenocyanate electrolyte exhibited a high V OC of 825.50 ± 3.51 mV and a high power conversion efficiency (η) of 8.18 ± 0.02%. The QSS-DSSC with 30 wt % POEI-IS retained up to 95% of its initial η after an at-rest stability test with the period of more than 1,000 h. 其他題名： ACS Appl. Mater. Interfaces 出版者： United States: American Chemical Society 出版日期： 2016-06-22 出處： ACS applied materials & interfaces, 2016-06, Vol.8 (24), p.15267-15278 資源來源： American Chemical Society Journals 版權： Copyright © 2016 American Chemical Society 識別號： ISSN: 1944-8244 識別號： ISSN: 1944-8252 識別號： EISSN: 1944-8252 識別號： DOI: 10.1021/acsami.6b02767 識別號： PMID: 27248206
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