Low Molecular Mass Organogelator Based Gel Electrolyte with Effective Charge Transport Property for Long-Term Stable Quasi-Solid-State Dye-Sensitized Solar Cells

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• 作者：Zhipeng Huo ; Songyuan Dai ; Changneng Zhang ; Fantai Kong ; Xiaqin Fang ; Lei Guo ; Weiqing Liu ; Linhua Hu ; Xu Pan ; Kongjia Wang
• 刊名：Journal of Physical Chemistry B
• 出版年：2008
• 出版时间：October 16, 2008
• 年：2008
• 卷：112
• 期：41
• 页码：12927-12933
• 全文大小：362K
• 年卷期：v.112,no.41(October 16, 2008)
• ISSN：1520-5207

文摘

Stable quasi-solid-state dye-sensitized solar cells (DSC) were fabricated using 12-hydroxystearic acid as a low molecular mass organogelator (LMOG) to form gel electrolyte. TEM image of the gel exhibited the self-assembled network constructed by the LMOG, which hindered flow and volatilization of the liquid. The formation of less-mobile polyiodide ions such as I₃⁻ and I₅⁻ confirmed by Raman spectroscopy increased the conductivity of the gel electrolytes by electronic conduction process, which should be rationalized by the Grotthuss-type electron exchange mechanism caused by rather packed polyiodide species in the electrolytes. The results of the accelerated aging tests showed that the gel electrolyte based dye-sensitized solar cell could retain over 97% of its initial photoelectric conversion efficiency value after successive heating at 60 °C for 1000 h and device degradation was also negligible after one sun light soaking with UV cutoff filter for 1000 h.